./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix021.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix021.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix021.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix021.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 03:09:14,015 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 03:09:14,073 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 03:09:14,078 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 03:09:14,078 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 03:09:14,105 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 03:09:14,105 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 03:09:14,105 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 03:09:14,106 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 03:09:14,106 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 03:09:14,106 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 03:09:14,106 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 03:09:14,107 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 03:09:14,107 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 03:09:14,107 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 03:09:14,107 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 03:09:14,108 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 03:09:14,108 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 03:09:14,108 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 03:09:14,108 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 03:09:14,108 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 03:09:14,115 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 03:09:14,115 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 03:09:14,116 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 03:09:14,118 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 03:09:14,119 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 03:09:14,119 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 03:09:14,119 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 03:09:14,120 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 03:09:14,120 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 03:09:14,121 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 03:09:14,121 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 03:09:14,121 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 03:09:14,121 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 03:09:14,121 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 03:09:14,121 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 03:09:14,121 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 03:09:14,122 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 03:09:14,122 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 03:09:14,122 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 03:09:14,122 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 03:09:14,122 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 03:09:14,122 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 03:09:14,122 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 03:09:14,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 03:09:14,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 03:09:14,376 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 03:09:14,377 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 03:09:14,377 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 03:09:14,378 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix021.opt.i [2024-06-28 03:09:15,365 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 03:09:15,583 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 03:09:15,587 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix021.opt.i [2024-06-28 03:09:15,608 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddfea8345/e2980336de3b416db6ad5bf43ee3e122/FLAG156074ee4 [2024-06-28 03:09:15,621 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddfea8345/e2980336de3b416db6ad5bf43ee3e122 [2024-06-28 03:09:15,623 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 03:09:15,624 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 03:09:15,626 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix021.opt.yml/witness.yml [2024-06-28 03:09:15,779 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 03:09:15,781 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 03:09:15,782 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 03:09:15,782 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 03:09:15,786 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 03:09:15,787 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 03:09:15" (1/2) ... [2024-06-28 03:09:15,788 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@784f0617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:09:15, skipping insertion in model container [2024-06-28 03:09:15,788 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 03:09:15" (1/2) ... [2024-06-28 03:09:15,789 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5d773476 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:09:15, skipping insertion in model container [2024-06-28 03:09:15,789 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:09:15" (2/2) ... [2024-06-28 03:09:15,790 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@784f0617 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:09:15, skipping insertion in model container [2024-06-28 03:09:15,790 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:09:15" (2/2) ... [2024-06-28 03:09:15,791 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 03:09:15,886 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 03:09:15,890 INFO L97 edCorrectnessWitness]: Location invariant before [L865-L865] (((((((((((((((((((((! multithreaded || z$r_buff0_thd0 == (_Bool)0) && (! multithreaded || (((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0) [2024-06-28 03:09:15,890 INFO L97 edCorrectnessWitness]: Location invariant before [L869-L869] (((((((((((((((((((((! multithreaded || z$r_buff0_thd0 == (_Bool)0) && (! multithreaded || (((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0) [2024-06-28 03:09:15,890 INFO L97 edCorrectnessWitness]: Location invariant before [L867-L867] (((((((((((((((((((((! multithreaded || z$r_buff0_thd0 == (_Bool)0) && (! multithreaded || (((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0) [2024-06-28 03:09:15,891 INFO L97 edCorrectnessWitness]: Location invariant before [L870-L870] (((((((((((((((((((((! multithreaded || z$r_buff0_thd0 == (_Bool)0) && (! multithreaded || (((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0) [2024-06-28 03:09:15,891 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 03:09:15,892 INFO L106 edCorrectnessWitness]: ghost_update [L863-L863] multithreaded = 1; [2024-06-28 03:09:15,931 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 03:09:16,217 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 03:09:16,224 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 03:09:16,318 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 03:09:16,347 INFO L206 MainTranslator]: Completed translation [2024-06-28 03:09:16,347 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:09:16 WrapperNode [2024-06-28 03:09:16,347 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 03:09:16,348 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 03:09:16,348 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 03:09:16,348 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 03:09:16,353 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 28.06 03:09:16" (1/1) ... [2024-06-28 03:09:16,365 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 28.06 03:09:16" (1/1) ... [2024-06-28 03:09:16,399 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 160 [2024-06-28 03:09:16,400 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 03:09:16,401 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 03:09:16,401 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 03:09:16,401 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 03:09:16,409 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:09:16" (1/1) ... [2024-06-28 03:09:16,409 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:09:16" (1/1) ... [2024-06-28 03:09:16,412 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:09:16" (1/1) ... [2024-06-28 03:09:16,425 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]. [2024-06-28 03:09:16,425 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:09:16" (1/1) ... [2024-06-28 03:09:16,425 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:09:16" (1/1) ... [2024-06-28 03:09:16,434 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:09:16" (1/1) ... [2024-06-28 03:09:16,449 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:09:16" (1/1) ... [2024-06-28 03:09:16,451 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:09:16" (1/1) ... [2024-06-28 03:09:16,452 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:09:16" (1/1) ... [2024-06-28 03:09:16,455 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 03:09:16,456 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 03:09:16,456 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 03:09:16,456 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 03:09:16,457 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:09:16" (1/1) ... [2024-06-28 03:09:16,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 03:09:16,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 03:09:16,496 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) [2024-06-28 03:09:16,506 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 [2024-06-28 03:09:16,578 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 03:09:16,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 03:09:16,579 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 03:09:16,579 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 03:09:16,579 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 03:09:16,579 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 03:09:16,579 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 03:09:16,579 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 03:09:16,579 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-28 03:09:16,580 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-28 03:09:16,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 03:09:16,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 03:09:16,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 03:09:16,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 03:09:16,582 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 03:09:16,721 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 03:09:16,723 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 03:09:17,026 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 03:09:17,026 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 03:09:17,131 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 03:09:17,131 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 03:09:17,132 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 03:09:17 BoogieIcfgContainer [2024-06-28 03:09:17,132 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 03:09:17,133 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 03:09:17,133 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 03:09:17,135 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 03:09:17,136 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 03:09:15" (1/4) ... [2024-06-28 03:09:17,136 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13301a0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 03:09:17, skipping insertion in model container [2024-06-28 03:09:17,136 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:09:15" (2/4) ... [2024-06-28 03:09:17,136 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13301a0d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 03:09:17, skipping insertion in model container [2024-06-28 03:09:17,137 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:09:16" (3/4) ... [2024-06-28 03:09:17,137 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13301a0d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 03:09:17, skipping insertion in model container [2024-06-28 03:09:17,137 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 03:09:17" (4/4) ... [2024-06-28 03:09:17,138 INFO L112 eAbstractionObserver]: Analyzing ICFG mix021.opt.i [2024-06-28 03:09:17,152 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 03:09:17,152 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-28 03:09:17,152 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 03:09:17,205 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 03:09:17,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-28 03:09:17,249 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-28 03:09:17,249 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 03:09:17,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 88 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 03:09:17,251 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-28 03:09:17,253 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-28 03:09:17,259 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 03:09:17,264 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;@d5dbd2a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 03:09:17,264 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-28 03:09:17,266 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 03:09:17,266 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 03:09:17,266 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 03:09:17,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:17,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 03:09:17,267 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)] === [2024-06-28 03:09:17,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:17,271 INFO L85 PathProgramCache]: Analyzing trace with hash 413024472, now seen corresponding path program 1 times [2024-06-28 03:09:17,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:17,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962032444] [2024-06-28 03:09:17,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:17,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:17,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:18,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:18,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:18,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962032444] [2024-06-28 03:09:18,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962032444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:18,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:18,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 03:09:18,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859230824] [2024-06-28 03:09:18,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:18,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 03:09:18,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:18,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 03:09:18,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 03:09:18,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-28 03:09:18,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:18,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:18,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-28 03:09:18,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:19,346 INFO L124 PetriNetUnfolderBase]: 7892/11107 cut-off events. [2024-06-28 03:09:19,346 INFO L125 PetriNetUnfolderBase]: For 153/153 co-relation queries the response was YES. [2024-06-28 03:09:19,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22184 conditions, 11107 events. 7892/11107 cut-off events. For 153/153 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 61593 event pairs, 6010 based on Foata normal form. 1/10744 useless extension candidates. Maximal degree in co-relation 22171. Up to 10748 conditions per place. [2024-06-28 03:09:19,409 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 42 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-06-28 03:09:19,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 227 flow [2024-06-28 03:09:19,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 03:09:19,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 03:09:19,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2024-06-28 03:09:19,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-06-28 03:09:19,420 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 99 transitions. [2024-06-28 03:09:19,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 227 flow [2024-06-28 03:09:19,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 220 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-28 03:09:19,428 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-28 03:09:19,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-28 03:09:19,432 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-28 03:09:19,432 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-28 03:09:19,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:19,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:19,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:09:19,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 03:09:19,433 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)] === [2024-06-28 03:09:19,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:19,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1779562167, now seen corresponding path program 1 times [2024-06-28 03:09:19,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:19,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012852336] [2024-06-28 03:09:19,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:19,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:19,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:20,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:20,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:20,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012852336] [2024-06-28 03:09:20,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012852336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:20,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:20,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 03:09:20,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549480891] [2024-06-28 03:09:20,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:20,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 03:09:20,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:20,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 03:09:20,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 03:09:20,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-28 03:09:20,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:20,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:20,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-28 03:09:20,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:21,164 INFO L124 PetriNetUnfolderBase]: 9032/12426 cut-off events. [2024-06-28 03:09:21,165 INFO L125 PetriNetUnfolderBase]: For 2463/2463 co-relation queries the response was YES. [2024-06-28 03:09:21,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28339 conditions, 12426 events. 9032/12426 cut-off events. For 2463/2463 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 66993 event pairs, 6162 based on Foata normal form. 4/12376 useless extension candidates. Maximal degree in co-relation 28327. Up to 12238 conditions per place. [2024-06-28 03:09:21,221 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 53 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2024-06-28 03:09:21,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 70 transitions, 321 flow [2024-06-28 03:09:21,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 03:09:21,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 03:09:21,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-06-28 03:09:21,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6057692307692307 [2024-06-28 03:09:21,223 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 126 transitions. [2024-06-28 03:09:21,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 70 transitions, 321 flow [2024-06-28 03:09:21,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 70 transitions, 316 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 03:09:21,225 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-28 03:09:21,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-28 03:09:21,226 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-28 03:09:21,226 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-28 03:09:21,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:21,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:21,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:09:21,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 03:09:21,227 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)] === [2024-06-28 03:09:21,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:21,227 INFO L85 PathProgramCache]: Analyzing trace with hash -668146491, now seen corresponding path program 1 times [2024-06-28 03:09:21,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:21,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073868495] [2024-06-28 03:09:21,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:21,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:21,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:21,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:21,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:21,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073868495] [2024-06-28 03:09:21,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073868495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:21,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:21,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 03:09:21,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195193659] [2024-06-28 03:09:21,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:21,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 03:09:21,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:21,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 03:09:21,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 03:09:21,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-28 03:09:21,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:21,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:21,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-28 03:09:21,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:23,103 INFO L124 PetriNetUnfolderBase]: 9050/12517 cut-off events. [2024-06-28 03:09:23,103 INFO L125 PetriNetUnfolderBase]: For 7147/7147 co-relation queries the response was YES. [2024-06-28 03:09:23,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31772 conditions, 12517 events. 9050/12517 cut-off events. For 7147/7147 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 68167 event pairs, 4826 based on Foata normal form. 7/12503 useless extension candidates. Maximal degree in co-relation 31758. Up to 12159 conditions per place. [2024-06-28 03:09:23,153 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 71 selfloop transitions, 21 changer transitions 0/100 dead transitions. [2024-06-28 03:09:23,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 100 transitions, 537 flow [2024-06-28 03:09:23,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:09:23,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:09:23,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 165 transitions. [2024-06-28 03:09:23,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-06-28 03:09:23,156 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 5 states and 165 transitions. [2024-06-28 03:09:23,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 100 transitions, 537 flow [2024-06-28 03:09:23,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 100 transitions, 518 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-28 03:09:23,159 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 310 flow [2024-06-28 03:09:23,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=310, PETRI_PLACES=62, PETRI_TRANSITIONS=64} [2024-06-28 03:09:23,160 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2024-06-28 03:09:23,160 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 310 flow [2024-06-28 03:09:23,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:23,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:23,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:09:23,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 03:09:23,161 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)] === [2024-06-28 03:09:23,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:23,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1293318280, now seen corresponding path program 1 times [2024-06-28 03:09:23,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:23,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873584948] [2024-06-28 03:09:23,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:23,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:23,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:23,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:23,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:23,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873584948] [2024-06-28 03:09:23,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873584948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:23,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:23,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:09:23,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111109544] [2024-06-28 03:09:23,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:23,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:09:23,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:23,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:09:23,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:09:23,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-28 03:09:23,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 310 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:23,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:23,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-28 03:09:23,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:25,028 INFO L124 PetriNetUnfolderBase]: 9079/12561 cut-off events. [2024-06-28 03:09:25,028 INFO L125 PetriNetUnfolderBase]: For 16942/16948 co-relation queries the response was YES. [2024-06-28 03:09:25,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37267 conditions, 12561 events. 9079/12561 cut-off events. For 16942/16948 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 68384 event pairs, 3910 based on Foata normal form. 18/12558 useless extension candidates. Maximal degree in co-relation 37250. Up to 12124 conditions per place. [2024-06-28 03:09:25,100 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 78 selfloop transitions, 25 changer transitions 0/111 dead transitions. [2024-06-28 03:09:25,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 111 transitions, 682 flow [2024-06-28 03:09:25,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:09:25,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:09:25,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2024-06-28 03:09:25,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6121794871794872 [2024-06-28 03:09:25,102 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 310 flow. Second operand 6 states and 191 transitions. [2024-06-28 03:09:25,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 111 transitions, 682 flow [2024-06-28 03:09:25,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 111 transitions, 670 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-28 03:09:25,109 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 387 flow [2024-06-28 03:09:25,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=290, 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=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=387, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2024-06-28 03:09:25,110 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 12 predicate places. [2024-06-28 03:09:25,110 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 387 flow [2024-06-28 03:09:25,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:25,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:25,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:09:25,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 03:09:25,111 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 03:09:25,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:25,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1553418920, now seen corresponding path program 1 times [2024-06-28 03:09:25,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:25,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213925606] [2024-06-28 03:09:25,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:25,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:25,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:25,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:25,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:25,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213925606] [2024-06-28 03:09:25,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213925606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:25,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:25,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:09:25,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793480238] [2024-06-28 03:09:25,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:25,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:09:25,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:25,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:09:25,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:09:25,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-28 03:09:25,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 387 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:25,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:25,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-28 03:09:25,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:26,976 INFO L124 PetriNetUnfolderBase]: 7920/11223 cut-off events. [2024-06-28 03:09:26,976 INFO L125 PetriNetUnfolderBase]: For 21720/21720 co-relation queries the response was YES. [2024-06-28 03:09:26,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36139 conditions, 11223 events. 7920/11223 cut-off events. For 21720/21720 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 63094 event pairs, 4036 based on Foata normal form. 3/11061 useless extension candidates. Maximal degree in co-relation 36118. Up to 10775 conditions per place. [2024-06-28 03:09:27,039 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 66 selfloop transitions, 10 changer transitions 0/84 dead transitions. [2024-06-28 03:09:27,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 84 transitions, 583 flow [2024-06-28 03:09:27,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:09:27,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:09:27,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-28 03:09:27,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5038461538461538 [2024-06-28 03:09:27,041 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 387 flow. Second operand 5 states and 131 transitions. [2024-06-28 03:09:27,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 84 transitions, 583 flow [2024-06-28 03:09:27,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 84 transitions, 514 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-28 03:09:27,051 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 349 flow [2024-06-28 03:09:27,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=349, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2024-06-28 03:09:27,052 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 13 predicate places. [2024-06-28 03:09:27,052 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 349 flow [2024-06-28 03:09:27,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:27,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:27,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:09:27,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 03:09:27,053 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)] === [2024-06-28 03:09:27,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:27,053 INFO L85 PathProgramCache]: Analyzing trace with hash 903015460, now seen corresponding path program 1 times [2024-06-28 03:09:27,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:27,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869567116] [2024-06-28 03:09:27,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:27,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:27,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:27,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:27,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:27,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869567116] [2024-06-28 03:09:27,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869567116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:27,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:27,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:09:27,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800738223] [2024-06-28 03:09:27,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:27,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:09:27,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:27,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:09:27,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:09:27,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-28 03:09:27,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 349 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:27,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:27,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-28 03:09:27,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:29,174 INFO L124 PetriNetUnfolderBase]: 7953/11429 cut-off events. [2024-06-28 03:09:29,174 INFO L125 PetriNetUnfolderBase]: For 25760/25760 co-relation queries the response was YES. [2024-06-28 03:09:29,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36958 conditions, 11429 events. 7953/11429 cut-off events. For 25760/25760 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 65298 event pairs, 3830 based on Foata normal form. 7/11411 useless extension candidates. Maximal degree in co-relation 36935. Up to 10689 conditions per place. [2024-06-28 03:09:29,230 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 82 selfloop transitions, 22 changer transitions 0/112 dead transitions. [2024-06-28 03:09:29,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 112 transitions, 757 flow [2024-06-28 03:09:29,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:09:29,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:09:29,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-28 03:09:29,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5352564102564102 [2024-06-28 03:09:29,232 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 349 flow. Second operand 6 states and 167 transitions. [2024-06-28 03:09:29,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 112 transitions, 757 flow [2024-06-28 03:09:29,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 112 transitions, 728 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-28 03:09:29,242 INFO L231 Difference]: Finished difference. Result has 72 places, 81 transitions, 494 flow [2024-06-28 03:09:29,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=494, PETRI_PLACES=72, PETRI_TRANSITIONS=81} [2024-06-28 03:09:29,243 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 17 predicate places. [2024-06-28 03:09:29,243 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 81 transitions, 494 flow [2024-06-28 03:09:29,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:29,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:29,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:09:29,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 03:09:29,244 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)] === [2024-06-28 03:09:29,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:29,245 INFO L85 PathProgramCache]: Analyzing trace with hash -803369445, now seen corresponding path program 1 times [2024-06-28 03:09:29,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:29,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815831090] [2024-06-28 03:09:29,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:29,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:29,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:29,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:29,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815831090] [2024-06-28 03:09:29,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815831090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:29,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:29,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:09:29,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189100805] [2024-06-28 03:09:29,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:29,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:09:29,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:29,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:09:29,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:09:30,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-28 03:09:30,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 81 transitions, 494 flow. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:30,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:30,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-28 03:09:30,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:31,424 INFO L124 PetriNetUnfolderBase]: 9116/12616 cut-off events. [2024-06-28 03:09:31,425 INFO L125 PetriNetUnfolderBase]: For 45375/45387 co-relation queries the response was YES. [2024-06-28 03:09:31,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46730 conditions, 12616 events. 9116/12616 cut-off events. For 45375/45387 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 68179 event pairs, 4510 based on Foata normal form. 14/12615 useless extension candidates. Maximal degree in co-relation 46705. Up to 12246 conditions per place. [2024-06-28 03:09:31,492 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 83 selfloop transitions, 25 changer transitions 0/115 dead transitions. [2024-06-28 03:09:31,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 115 transitions, 853 flow [2024-06-28 03:09:31,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:09:31,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:09:31,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-28 03:09:31,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5160256410256411 [2024-06-28 03:09:31,494 INFO L175 Difference]: Start difference. First operand has 72 places, 81 transitions, 494 flow. Second operand 6 states and 161 transitions. [2024-06-28 03:09:31,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 115 transitions, 853 flow [2024-06-28 03:09:31,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 115 transitions, 829 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-28 03:09:31,518 INFO L231 Difference]: Finished difference. Result has 77 places, 85 transitions, 566 flow [2024-06-28 03:09:31,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=566, PETRI_PLACES=77, PETRI_TRANSITIONS=85} [2024-06-28 03:09:31,520 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 22 predicate places. [2024-06-28 03:09:31,520 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 85 transitions, 566 flow [2024-06-28 03:09:31,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:31,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:31,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:09:31,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 03:09:31,521 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)] === [2024-06-28 03:09:31,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:31,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1813010681, now seen corresponding path program 2 times [2024-06-28 03:09:31,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:31,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971703012] [2024-06-28 03:09:31,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:31,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:32,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:32,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:32,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971703012] [2024-06-28 03:09:32,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971703012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:32,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:32,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:09:32,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263039416] [2024-06-28 03:09:32,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:32,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:09:32,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:32,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:09:32,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:09:32,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-28 03:09:32,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 85 transitions, 566 flow. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:32,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:32,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-28 03:09:32,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:33,633 INFO L124 PetriNetUnfolderBase]: 9092/12568 cut-off events. [2024-06-28 03:09:33,634 INFO L125 PetriNetUnfolderBase]: For 50462/50468 co-relation queries the response was YES. [2024-06-28 03:09:33,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47123 conditions, 12568 events. 9092/12568 cut-off events. For 50462/50468 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 68090 event pairs, 4530 based on Foata normal form. 4/12550 useless extension candidates. Maximal degree in co-relation 47095. Up to 12216 conditions per place. [2024-06-28 03:09:33,709 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 76 selfloop transitions, 26 changer transitions 0/109 dead transitions. [2024-06-28 03:09:33,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 109 transitions, 832 flow [2024-06-28 03:09:33,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:09:33,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:09:33,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-28 03:09:33,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 03:09:33,711 INFO L175 Difference]: Start difference. First operand has 77 places, 85 transitions, 566 flow. Second operand 6 states and 156 transitions. [2024-06-28 03:09:33,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 109 transitions, 832 flow [2024-06-28 03:09:33,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 109 transitions, 789 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-28 03:09:33,733 INFO L231 Difference]: Finished difference. Result has 80 places, 85 transitions, 586 flow [2024-06-28 03:09:33,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=586, PETRI_PLACES=80, PETRI_TRANSITIONS=85} [2024-06-28 03:09:33,734 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 25 predicate places. [2024-06-28 03:09:33,734 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 85 transitions, 586 flow [2024-06-28 03:09:33,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:33,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:33,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:09:33,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 03:09:33,735 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)] === [2024-06-28 03:09:33,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:33,735 INFO L85 PathProgramCache]: Analyzing trace with hash 330617189, now seen corresponding path program 1 times [2024-06-28 03:09:33,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:33,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971381246] [2024-06-28 03:09:33,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:33,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:33,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:34,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:34,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:34,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971381246] [2024-06-28 03:09:34,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971381246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:34,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:34,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:09:34,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908398429] [2024-06-28 03:09:34,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:34,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:09:34,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:34,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:09:34,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:09:34,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-28 03:09:34,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 85 transitions, 586 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:34,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:34,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-28 03:09:34,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:36,356 INFO L124 PetriNetUnfolderBase]: 9902/13740 cut-off events. [2024-06-28 03:09:36,356 INFO L125 PetriNetUnfolderBase]: For 64016/64022 co-relation queries the response was YES. [2024-06-28 03:09:36,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52889 conditions, 13740 events. 9902/13740 cut-off events. For 64016/64022 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 74875 event pairs, 3695 based on Foata normal form. 15/13737 useless extension candidates. Maximal degree in co-relation 52860. Up to 12138 conditions per place. [2024-06-28 03:09:36,459 INFO L140 encePairwiseOnDemand]: 35/52 looper letters, 127 selfloop transitions, 59 changer transitions 0/193 dead transitions. [2024-06-28 03:09:36,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 193 transitions, 1682 flow [2024-06-28 03:09:36,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:09:36,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:09:36,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-06-28 03:09:36,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-28 03:09:36,461 INFO L175 Difference]: Start difference. First operand has 80 places, 85 transitions, 586 flow. Second operand 8 states and 234 transitions. [2024-06-28 03:09:36,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 193 transitions, 1682 flow [2024-06-28 03:09:36,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 193 transitions, 1519 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 03:09:36,506 INFO L231 Difference]: Finished difference. Result has 85 places, 121 transitions, 937 flow [2024-06-28 03:09:36,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=937, PETRI_PLACES=85, PETRI_TRANSITIONS=121} [2024-06-28 03:09:36,507 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 30 predicate places. [2024-06-28 03:09:36,507 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 121 transitions, 937 flow [2024-06-28 03:09:36,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:36,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:36,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:09:36,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 03:09:36,508 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)] === [2024-06-28 03:09:36,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:36,509 INFO L85 PathProgramCache]: Analyzing trace with hash 37120805, now seen corresponding path program 2 times [2024-06-28 03:09:36,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:36,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352443697] [2024-06-28 03:09:36,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:36,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:36,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:37,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:37,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:37,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352443697] [2024-06-28 03:09:37,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352443697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:37,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:37,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:09:37,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342885320] [2024-06-28 03:09:37,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:37,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:09:37,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:37,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:09:37,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:09:37,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-28 03:09:37,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 121 transitions, 937 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:37,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:37,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-28 03:09:37,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:39,325 INFO L124 PetriNetUnfolderBase]: 10518/14713 cut-off events. [2024-06-28 03:09:39,325 INFO L125 PetriNetUnfolderBase]: For 95106/95118 co-relation queries the response was YES. [2024-06-28 03:09:39,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65157 conditions, 14713 events. 10518/14713 cut-off events. For 95106/95118 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 82033 event pairs, 4002 based on Foata normal form. 31/14726 useless extension candidates. Maximal degree in co-relation 65124. Up to 12540 conditions per place. [2024-06-28 03:09:39,424 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 105 selfloop transitions, 81 changer transitions 0/193 dead transitions. [2024-06-28 03:09:39,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 193 transitions, 1821 flow [2024-06-28 03:09:39,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:09:39,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:09:39,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-28 03:09:39,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5521978021978022 [2024-06-28 03:09:39,425 INFO L175 Difference]: Start difference. First operand has 85 places, 121 transitions, 937 flow. Second operand 7 states and 201 transitions. [2024-06-28 03:09:39,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 193 transitions, 1821 flow [2024-06-28 03:09:39,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 193 transitions, 1727 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-28 03:09:39,514 INFO L231 Difference]: Finished difference. Result has 92 places, 142 transitions, 1310 flow [2024-06-28 03:09:39,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=867, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1310, PETRI_PLACES=92, PETRI_TRANSITIONS=142} [2024-06-28 03:09:39,515 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 37 predicate places. [2024-06-28 03:09:39,515 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 142 transitions, 1310 flow [2024-06-28 03:09:39,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:39,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:39,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:09:39,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 03:09:39,515 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)] === [2024-06-28 03:09:39,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:39,516 INFO L85 PathProgramCache]: Analyzing trace with hash -368755197, now seen corresponding path program 3 times [2024-06-28 03:09:39,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:39,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731655243] [2024-06-28 03:09:39,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:39,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:39,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:40,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:40,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:40,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731655243] [2024-06-28 03:09:40,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731655243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:40,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:40,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:09:40,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467462622] [2024-06-28 03:09:40,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:40,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:09:40,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:40,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:09:40,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:09:40,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-28 03:09:40,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 142 transitions, 1310 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:40,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:40,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-28 03:09:40,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:42,214 INFO L124 PetriNetUnfolderBase]: 10642/14901 cut-off events. [2024-06-28 03:09:42,214 INFO L125 PetriNetUnfolderBase]: For 125563/125579 co-relation queries the response was YES. [2024-06-28 03:09:42,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72563 conditions, 14901 events. 10642/14901 cut-off events. For 125563/125579 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 83061 event pairs, 4078 based on Foata normal form. 16/14878 useless extension candidates. Maximal degree in co-relation 72526. Up to 12612 conditions per place. [2024-06-28 03:09:42,333 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 109 selfloop transitions, 93 changer transitions 0/209 dead transitions. [2024-06-28 03:09:42,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 209 transitions, 2266 flow [2024-06-28 03:09:42,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:09:42,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:09:42,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-28 03:09:42,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5467032967032966 [2024-06-28 03:09:42,334 INFO L175 Difference]: Start difference. First operand has 92 places, 142 transitions, 1310 flow. Second operand 7 states and 199 transitions. [2024-06-28 03:09:42,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 209 transitions, 2266 flow [2024-06-28 03:09:42,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 209 transitions, 2139 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-28 03:09:42,476 INFO L231 Difference]: Finished difference. Result has 97 places, 158 transitions, 1593 flow [2024-06-28 03:09:42,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1195, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1593, PETRI_PLACES=97, PETRI_TRANSITIONS=158} [2024-06-28 03:09:42,476 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 42 predicate places. [2024-06-28 03:09:42,476 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 158 transitions, 1593 flow [2024-06-28 03:09:42,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:42,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:42,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:09:42,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 03:09:42,477 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)] === [2024-06-28 03:09:42,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:42,478 INFO L85 PathProgramCache]: Analyzing trace with hash 214489475, now seen corresponding path program 4 times [2024-06-28 03:09:42,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:42,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256577281] [2024-06-28 03:09:42,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:42,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:42,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:43,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:43,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:43,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256577281] [2024-06-28 03:09:43,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256577281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:43,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:43,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:09:43,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566284087] [2024-06-28 03:09:43,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:43,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:09:43,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:43,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:09:43,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:09:43,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-28 03:09:43,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 158 transitions, 1593 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:43,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:43,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-28 03:09:43,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:45,131 INFO L124 PetriNetUnfolderBase]: 10688/14966 cut-off events. [2024-06-28 03:09:45,131 INFO L125 PetriNetUnfolderBase]: For 156952/156978 co-relation queries the response was YES. [2024-06-28 03:09:45,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76783 conditions, 14966 events. 10688/14966 cut-off events. For 156952/156978 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 83356 event pairs, 3993 based on Foata normal form. 24/14951 useless extension candidates. Maximal degree in co-relation 76744. Up to 12645 conditions per place. [2024-06-28 03:09:45,264 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 99 selfloop transitions, 108 changer transitions 0/214 dead transitions. [2024-06-28 03:09:45,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 214 transitions, 2426 flow [2024-06-28 03:09:45,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:09:45,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:09:45,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-28 03:09:45,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5412087912087912 [2024-06-28 03:09:45,268 INFO L175 Difference]: Start difference. First operand has 97 places, 158 transitions, 1593 flow. Second operand 7 states and 197 transitions. [2024-06-28 03:09:45,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 214 transitions, 2426 flow [2024-06-28 03:09:45,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 214 transitions, 2231 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-28 03:09:45,451 INFO L231 Difference]: Finished difference. Result has 101 places, 166 transitions, 1746 flow [2024-06-28 03:09:45,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1412, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1746, PETRI_PLACES=101, PETRI_TRANSITIONS=166} [2024-06-28 03:09:45,452 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 46 predicate places. [2024-06-28 03:09:45,452 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 166 transitions, 1746 flow [2024-06-28 03:09:45,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:45,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:45,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:09:45,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 03:09:45,453 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)] === [2024-06-28 03:09:45,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:45,453 INFO L85 PathProgramCache]: Analyzing trace with hash 214498403, now seen corresponding path program 1 times [2024-06-28 03:09:45,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:45,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064680374] [2024-06-28 03:09:45,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:45,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:45,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:46,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:46,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:46,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064680374] [2024-06-28 03:09:46,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064680374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:46,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:46,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:09:46,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298943676] [2024-06-28 03:09:46,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:46,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:09:46,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:46,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:09:46,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:09:46,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-28 03:09:46,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 166 transitions, 1746 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:46,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:46,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-28 03:09:46,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:48,039 INFO L124 PetriNetUnfolderBase]: 9684/13992 cut-off events. [2024-06-28 03:09:48,039 INFO L125 PetriNetUnfolderBase]: For 147406/147408 co-relation queries the response was YES. [2024-06-28 03:09:48,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71043 conditions, 13992 events. 9684/13992 cut-off events. For 147406/147408 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 81462 event pairs, 3652 based on Foata normal form. 26/13987 useless extension candidates. Maximal degree in co-relation 71002. Up to 12811 conditions per place. [2024-06-28 03:09:48,134 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 179 selfloop transitions, 25 changer transitions 0/212 dead transitions. [2024-06-28 03:09:48,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 212 transitions, 2420 flow [2024-06-28 03:09:48,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:09:48,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:09:48,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-28 03:09:48,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-06-28 03:09:48,136 INFO L175 Difference]: Start difference. First operand has 101 places, 166 transitions, 1746 flow. Second operand 7 states and 196 transitions. [2024-06-28 03:09:48,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 212 transitions, 2420 flow [2024-06-28 03:09:48,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 212 transitions, 2230 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-28 03:09:48,277 INFO L231 Difference]: Finished difference. Result has 104 places, 169 transitions, 1663 flow [2024-06-28 03:09:48,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1556, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1663, PETRI_PLACES=104, PETRI_TRANSITIONS=169} [2024-06-28 03:09:48,277 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 49 predicate places. [2024-06-28 03:09:48,277 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 169 transitions, 1663 flow [2024-06-28 03:09:48,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:48,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:48,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:09:48,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 03:09:48,278 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)] === [2024-06-28 03:09:48,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:48,278 INFO L85 PathProgramCache]: Analyzing trace with hash -281310508, now seen corresponding path program 1 times [2024-06-28 03:09:48,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:48,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777014837] [2024-06-28 03:09:48,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:48,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:48,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:48,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:48,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:48,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777014837] [2024-06-28 03:09:48,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777014837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:48,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:48,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:09:48,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708070407] [2024-06-28 03:09:48,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:48,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:09:48,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:48,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:09:48,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:09:48,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-28 03:09:48,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 169 transitions, 1663 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:48,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:48,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-28 03:09:48,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:50,351 INFO L124 PetriNetUnfolderBase]: 9670/13972 cut-off events. [2024-06-28 03:09:50,352 INFO L125 PetriNetUnfolderBase]: For 157964/157966 co-relation queries the response was YES. [2024-06-28 03:09:50,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71481 conditions, 13972 events. 9670/13972 cut-off events. For 157964/157966 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 81342 event pairs, 3787 based on Foata normal form. 4/13957 useless extension candidates. Maximal degree in co-relation 71439. Up to 13102 conditions per place. [2024-06-28 03:09:50,463 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 166 selfloop transitions, 10 changer transitions 0/184 dead transitions. [2024-06-28 03:09:50,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 184 transitions, 2061 flow [2024-06-28 03:09:50,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:09:50,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:09:50,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-28 03:09:50,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49230769230769234 [2024-06-28 03:09:50,464 INFO L175 Difference]: Start difference. First operand has 104 places, 169 transitions, 1663 flow. Second operand 5 states and 128 transitions. [2024-06-28 03:09:50,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 184 transitions, 2061 flow [2024-06-28 03:09:50,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 184 transitions, 1978 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-28 03:09:50,626 INFO L231 Difference]: Finished difference. Result has 104 places, 169 transitions, 1609 flow [2024-06-28 03:09:50,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1580, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1609, PETRI_PLACES=104, PETRI_TRANSITIONS=169} [2024-06-28 03:09:50,627 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 49 predicate places. [2024-06-28 03:09:50,627 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 169 transitions, 1609 flow [2024-06-28 03:09:50,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:50,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:50,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:09:50,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 03:09:50,628 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)] === [2024-06-28 03:09:50,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:50,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1150745835, now seen corresponding path program 1 times [2024-06-28 03:09:50,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:50,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926317461] [2024-06-28 03:09:50,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:50,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:50,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:51,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:51,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:51,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926317461] [2024-06-28 03:09:51,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926317461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:51,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:51,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:09:51,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235077994] [2024-06-28 03:09:51,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:51,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:09:51,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:51,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:09:51,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:09:51,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-28 03:09:51,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 169 transitions, 1609 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:51,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:51,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-28 03:09:51,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:53,244 INFO L124 PetriNetUnfolderBase]: 11096/15623 cut-off events. [2024-06-28 03:09:53,245 INFO L125 PetriNetUnfolderBase]: For 199957/199987 co-relation queries the response was YES. [2024-06-28 03:09:53,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81400 conditions, 15623 events. 11096/15623 cut-off events. For 199957/199987 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 88421 event pairs, 4066 based on Foata normal form. 37/15645 useless extension candidates. Maximal degree in co-relation 81357. Up to 13095 conditions per place. [2024-06-28 03:09:53,380 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 119 selfloop transitions, 113 changer transitions 0/239 dead transitions. [2024-06-28 03:09:53,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 239 transitions, 2707 flow [2024-06-28 03:09:53,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:09:53,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:09:53,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-28 03:09:53,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5494505494505495 [2024-06-28 03:09:53,382 INFO L175 Difference]: Start difference. First operand has 104 places, 169 transitions, 1609 flow. Second operand 7 states and 200 transitions. [2024-06-28 03:09:53,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 239 transitions, 2707 flow [2024-06-28 03:09:53,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 239 transitions, 2674 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-28 03:09:53,574 INFO L231 Difference]: Finished difference. Result has 109 places, 188 transitions, 2155 flow [2024-06-28 03:09:53,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1576, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2155, PETRI_PLACES=109, PETRI_TRANSITIONS=188} [2024-06-28 03:09:53,575 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 54 predicate places. [2024-06-28 03:09:53,575 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 188 transitions, 2155 flow [2024-06-28 03:09:53,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:53,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:53,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:09:53,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 03:09:53,575 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)] === [2024-06-28 03:09:53,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:53,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1150740255, now seen corresponding path program 2 times [2024-06-28 03:09:53,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:53,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917901866] [2024-06-28 03:09:53,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:53,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:53,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:54,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:54,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:54,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917901866] [2024-06-28 03:09:54,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917901866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:54,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:54,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:09:54,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595754908] [2024-06-28 03:09:54,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:54,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:09:54,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:54,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:09:54,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:09:54,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-28 03:09:54,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 188 transitions, 2155 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:54,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:54,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-28 03:09:54,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:56,268 INFO L124 PetriNetUnfolderBase]: 11070/15586 cut-off events. [2024-06-28 03:09:56,268 INFO L125 PetriNetUnfolderBase]: For 235406/235428 co-relation queries the response was YES. [2024-06-28 03:09:56,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87405 conditions, 15586 events. 11070/15586 cut-off events. For 235406/235428 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 88040 event pairs, 4140 based on Foata normal form. 31/15602 useless extension candidates. Maximal degree in co-relation 87360. Up to 13081 conditions per place. [2024-06-28 03:09:56,382 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 120 selfloop transitions, 120 changer transitions 0/247 dead transitions. [2024-06-28 03:09:56,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 247 transitions, 3145 flow [2024-06-28 03:09:56,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:09:56,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:09:56,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-06-28 03:09:56,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5576923076923077 [2024-06-28 03:09:56,383 INFO L175 Difference]: Start difference. First operand has 109 places, 188 transitions, 2155 flow. Second operand 7 states and 203 transitions. [2024-06-28 03:09:56,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 247 transitions, 3145 flow [2024-06-28 03:09:56,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 247 transitions, 2956 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-28 03:09:56,714 INFO L231 Difference]: Finished difference. Result has 115 places, 195 transitions, 2459 flow [2024-06-28 03:09:56,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1970, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2459, PETRI_PLACES=115, PETRI_TRANSITIONS=195} [2024-06-28 03:09:56,715 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 60 predicate places. [2024-06-28 03:09:56,715 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 195 transitions, 2459 flow [2024-06-28 03:09:56,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:56,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:56,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:09:56,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 03:09:56,715 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)] === [2024-06-28 03:09:56,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:56,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1460843311, now seen corresponding path program 3 times [2024-06-28 03:09:56,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:56,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988043234] [2024-06-28 03:09:56,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:56,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:56,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:57,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:57,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:57,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988043234] [2024-06-28 03:09:57,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988043234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:57,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:57,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:09:57,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937827703] [2024-06-28 03:09:57,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:57,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:09:57,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:57,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:09:57,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:09:57,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-28 03:09:57,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 195 transitions, 2459 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:57,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:57,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-28 03:09:57,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:59,427 INFO L124 PetriNetUnfolderBase]: 11116/15646 cut-off events. [2024-06-28 03:09:59,427 INFO L125 PetriNetUnfolderBase]: For 267136/267243 co-relation queries the response was YES. [2024-06-28 03:09:59,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91393 conditions, 15646 events. 11116/15646 cut-off events. For 267136/267243 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 88469 event pairs, 4056 based on Foata normal form. 73/15648 useless extension candidates. Maximal degree in co-relation 91345. Up to 13129 conditions per place. [2024-06-28 03:09:59,568 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 114 selfloop transitions, 124 changer transitions 0/245 dead transitions. [2024-06-28 03:09:59,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 245 transitions, 3287 flow [2024-06-28 03:09:59,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:09:59,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:09:59,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-06-28 03:09:59,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5247252747252747 [2024-06-28 03:09:59,570 INFO L175 Difference]: Start difference. First operand has 115 places, 195 transitions, 2459 flow. Second operand 7 states and 191 transitions. [2024-06-28 03:09:59,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 245 transitions, 3287 flow [2024-06-28 03:09:59,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 245 transitions, 3113 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-28 03:09:59,931 INFO L231 Difference]: Finished difference. Result has 118 places, 204 transitions, 2701 flow [2024-06-28 03:09:59,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2293, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2701, PETRI_PLACES=118, PETRI_TRANSITIONS=204} [2024-06-28 03:09:59,931 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 63 predicate places. [2024-06-28 03:09:59,932 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 204 transitions, 2701 flow [2024-06-28 03:09:59,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:59,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:59,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:09:59,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 03:09:59,932 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)] === [2024-06-28 03:09:59,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:59,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1349705266, now seen corresponding path program 1 times [2024-06-28 03:09:59,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:59,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243861959] [2024-06-28 03:09:59,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:59,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:59,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:10:00,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:10:00,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:10:00,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243861959] [2024-06-28 03:10:00,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243861959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:10:00,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:10:00,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:10:00,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981114026] [2024-06-28 03:10:00,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:10:00,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:10:00,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:10:00,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:10:00,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:10:00,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-28 03:10:00,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 204 transitions, 2701 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:00,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:10:00,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-28 03:10:00,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:10:02,454 INFO L124 PetriNetUnfolderBase]: 11152/15705 cut-off events. [2024-06-28 03:10:02,454 INFO L125 PetriNetUnfolderBase]: For 288900/288938 co-relation queries the response was YES. [2024-06-28 03:10:02,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92968 conditions, 15705 events. 11152/15705 cut-off events. For 288900/288938 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 88644 event pairs, 3346 based on Foata normal form. 38/15737 useless extension candidates. Maximal degree in co-relation 92919. Up to 14691 conditions per place. [2024-06-28 03:10:02,615 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 202 selfloop transitions, 41 changer transitions 0/250 dead transitions. [2024-06-28 03:10:02,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 250 transitions, 3529 flow [2024-06-28 03:10:02,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:10:02,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:10:02,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-28 03:10:02,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5082417582417582 [2024-06-28 03:10:02,617 INFO L175 Difference]: Start difference. First operand has 118 places, 204 transitions, 2701 flow. Second operand 7 states and 185 transitions. [2024-06-28 03:10:02,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 250 transitions, 3529 flow [2024-06-28 03:10:03,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 250 transitions, 3317 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-28 03:10:03,015 INFO L231 Difference]: Finished difference. Result has 121 places, 210 transitions, 2703 flow [2024-06-28 03:10:03,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2489, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2703, PETRI_PLACES=121, PETRI_TRANSITIONS=210} [2024-06-28 03:10:03,016 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 66 predicate places. [2024-06-28 03:10:03,016 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 210 transitions, 2703 flow [2024-06-28 03:10:03,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:03,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:10:03,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:10:03,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 03:10:03,016 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)] === [2024-06-28 03:10:03,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:10:03,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1197914504, now seen corresponding path program 2 times [2024-06-28 03:10:03,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:10:03,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586269560] [2024-06-28 03:10:03,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:10:03,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:10:03,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:10:03,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:10:03,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:10:03,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586269560] [2024-06-28 03:10:03,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586269560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:10:03,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:10:03,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:10:03,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650488864] [2024-06-28 03:10:03,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:10:03,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:10:03,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:10:03,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:10:03,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:10:03,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-28 03:10:03,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 210 transitions, 2703 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:03,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:10:03,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-28 03:10:03,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:10:05,685 INFO L124 PetriNetUnfolderBase]: 11137/15671 cut-off events. [2024-06-28 03:10:05,685 INFO L125 PetriNetUnfolderBase]: For 314927/314949 co-relation queries the response was YES. [2024-06-28 03:10:05,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93522 conditions, 15671 events. 11137/15671 cut-off events. For 314927/314949 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 88321 event pairs, 3998 based on Foata normal form. 22/15687 useless extension candidates. Maximal degree in co-relation 93471. Up to 14806 conditions per place. [2024-06-28 03:10:05,830 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 201 selfloop transitions, 40 changer transitions 0/248 dead transitions. [2024-06-28 03:10:05,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 248 transitions, 3315 flow [2024-06-28 03:10:05,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:10:05,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:10:05,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-28 03:10:05,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 03:10:05,845 INFO L175 Difference]: Start difference. First operand has 121 places, 210 transitions, 2703 flow. Second operand 7 states and 182 transitions. [2024-06-28 03:10:05,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 248 transitions, 3315 flow [2024-06-28 03:10:06,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 248 transitions, 3183 flow, removed 49 selfloop flow, removed 3 redundant places. [2024-06-28 03:10:06,372 INFO L231 Difference]: Finished difference. Result has 125 places, 210 transitions, 2663 flow [2024-06-28 03:10:06,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2571, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2663, PETRI_PLACES=125, PETRI_TRANSITIONS=210} [2024-06-28 03:10:06,373 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 70 predicate places. [2024-06-28 03:10:06,373 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 210 transitions, 2663 flow [2024-06-28 03:10:06,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:06,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:10:06,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:10:06,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 03:10:06,373 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)] === [2024-06-28 03:10:06,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:10:06,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1313390372, now seen corresponding path program 1 times [2024-06-28 03:10:06,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:10:06,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515653125] [2024-06-28 03:10:06,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:10:06,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:10:06,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:10:07,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:10:07,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:10:07,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515653125] [2024-06-28 03:10:07,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515653125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:10:07,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:10:07,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:10:07,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596056463] [2024-06-28 03:10:07,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:10:07,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:10:07,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:10:07,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:10:07,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:10:07,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-28 03:10:07,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 210 transitions, 2663 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:07,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:10:07,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-28 03:10:07,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:10:09,653 INFO L124 PetriNetUnfolderBase]: 11945/16930 cut-off events. [2024-06-28 03:10:09,653 INFO L125 PetriNetUnfolderBase]: For 370532/370548 co-relation queries the response was YES. [2024-06-28 03:10:09,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100137 conditions, 16930 events. 11945/16930 cut-off events. For 370532/370548 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 98124 event pairs, 3919 based on Foata normal form. 127/17042 useless extension candidates. Maximal degree in co-relation 100084. Up to 13214 conditions per place. [2024-06-28 03:10:09,807 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 135 selfloop transitions, 132 changer transitions 0/274 dead transitions. [2024-06-28 03:10:09,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 274 transitions, 3685 flow [2024-06-28 03:10:09,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:10:09,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:10:09,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-06-28 03:10:09,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528846153846154 [2024-06-28 03:10:09,808 INFO L175 Difference]: Start difference. First operand has 125 places, 210 transitions, 2663 flow. Second operand 8 states and 230 transitions. [2024-06-28 03:10:09,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 274 transitions, 3685 flow [2024-06-28 03:10:10,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 274 transitions, 3593 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 03:10:10,216 INFO L231 Difference]: Finished difference. Result has 127 places, 213 transitions, 2923 flow [2024-06-28 03:10:10,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2571, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2923, PETRI_PLACES=127, PETRI_TRANSITIONS=213} [2024-06-28 03:10:10,217 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 72 predicate places. [2024-06-28 03:10:10,217 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 213 transitions, 2923 flow [2024-06-28 03:10:10,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:10,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:10:10,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:10:10,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 03:10:10,217 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 03:10:10,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:10:10,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1585235203, now seen corresponding path program 1 times [2024-06-28 03:10:10,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:10:10,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355195683] [2024-06-28 03:10:10,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:10:10,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:10:10,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:10:10,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:10:10,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:10:10,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355195683] [2024-06-28 03:10:10,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355195683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:10:10,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:10:10,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:10:10,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184585919] [2024-06-28 03:10:10,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:10:10,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:10:10,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:10:10,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:10:10,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:10:10,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-28 03:10:10,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 213 transitions, 2923 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:10,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:10:10,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-28 03:10:10,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:10:13,315 INFO L124 PetriNetUnfolderBase]: 11991/16930 cut-off events. [2024-06-28 03:10:13,315 INFO L125 PetriNetUnfolderBase]: For 389090/389100 co-relation queries the response was YES. [2024-06-28 03:10:13,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105162 conditions, 16930 events. 11991/16930 cut-off events. For 389090/389100 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 97064 event pairs, 4225 based on Foata normal form. 18/16941 useless extension candidates. Maximal degree in co-relation 105108. Up to 16206 conditions per place. [2024-06-28 03:10:13,460 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 216 selfloop transitions, 29 changer transitions 0/252 dead transitions. [2024-06-28 03:10:13,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 252 transitions, 3741 flow [2024-06-28 03:10:13,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:10:13,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:10:13,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-28 03:10:13,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5032051282051282 [2024-06-28 03:10:13,461 INFO L175 Difference]: Start difference. First operand has 127 places, 213 transitions, 2923 flow. Second operand 6 states and 157 transitions. [2024-06-28 03:10:13,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 252 transitions, 3741 flow [2024-06-28 03:10:14,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 252 transitions, 3427 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-28 03:10:14,081 INFO L231 Difference]: Finished difference. Result has 127 places, 220 transitions, 2821 flow [2024-06-28 03:10:14,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2621, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2821, PETRI_PLACES=127, PETRI_TRANSITIONS=220} [2024-06-28 03:10:14,082 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 72 predicate places. [2024-06-28 03:10:14,082 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 220 transitions, 2821 flow [2024-06-28 03:10:14,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:14,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:10:14,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:10:14,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 03:10:14,083 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)] === [2024-06-28 03:10:14,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:10:14,083 INFO L85 PathProgramCache]: Analyzing trace with hash -261910748, now seen corresponding path program 2 times [2024-06-28 03:10:14,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:10:14,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118320043] [2024-06-28 03:10:14,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:10:14,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:10:14,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:10:14,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:10:14,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:10:14,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118320043] [2024-06-28 03:10:14,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118320043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:10:14,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:10:14,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:10:14,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512169337] [2024-06-28 03:10:14,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:10:14,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:10:14,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:10:14,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:10:14,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:10:15,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-28 03:10:15,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 220 transitions, 2821 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:15,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:10:15,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-28 03:10:15,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:10:17,732 INFO L124 PetriNetUnfolderBase]: 12188/17247 cut-off events. [2024-06-28 03:10:17,732 INFO L125 PetriNetUnfolderBase]: For 404789/404812 co-relation queries the response was YES. [2024-06-28 03:10:17,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104198 conditions, 17247 events. 12188/17247 cut-off events. For 404789/404812 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 99796 event pairs, 4029 based on Foata normal form. 32/17226 useless extension candidates. Maximal degree in co-relation 104143. Up to 14445 conditions per place. [2024-06-28 03:10:17,871 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 134 selfloop transitions, 139 changer transitions 0/280 dead transitions. [2024-06-28 03:10:17,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 280 transitions, 3875 flow [2024-06-28 03:10:17,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:10:17,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:10:17,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-06-28 03:10:17,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5408653846153846 [2024-06-28 03:10:17,873 INFO L175 Difference]: Start difference. First operand has 127 places, 220 transitions, 2821 flow. Second operand 8 states and 225 transitions. [2024-06-28 03:10:17,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 280 transitions, 3875 flow [2024-06-28 03:10:18,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 280 transitions, 3493 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-28 03:10:18,340 INFO L231 Difference]: Finished difference. Result has 128 places, 223 transitions, 2806 flow [2024-06-28 03:10:18,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2439, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2806, PETRI_PLACES=128, PETRI_TRANSITIONS=223} [2024-06-28 03:10:18,340 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 73 predicate places. [2024-06-28 03:10:18,340 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 223 transitions, 2806 flow [2024-06-28 03:10:18,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:18,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:10:18,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:10:18,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 03:10:18,341 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)] === [2024-06-28 03:10:18,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:10:18,341 INFO L85 PathProgramCache]: Analyzing trace with hash -34009598, now seen corresponding path program 3 times [2024-06-28 03:10:18,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:10:18,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721422594] [2024-06-28 03:10:18,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:10:18,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:10:18,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:10:19,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:10:19,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:10:19,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721422594] [2024-06-28 03:10:19,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721422594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:10:19,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:10:19,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:10:19,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28345272] [2024-06-28 03:10:19,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:10:19,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:10:19,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:10:19,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:10:19,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:10:19,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-28 03:10:19,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 223 transitions, 2806 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:19,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:10:19,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-28 03:10:19,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:10:21,741 INFO L124 PetriNetUnfolderBase]: 12385/17540 cut-off events. [2024-06-28 03:10:21,741 INFO L125 PetriNetUnfolderBase]: For 436624/436657 co-relation queries the response was YES. [2024-06-28 03:10:21,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109162 conditions, 17540 events. 12385/17540 cut-off events. For 436624/436657 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 101763 event pairs, 3974 based on Foata normal form. 40/17526 useless extension candidates. Maximal degree in co-relation 109108. Up to 14740 conditions per place. [2024-06-28 03:10:21,926 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 128 selfloop transitions, 147 changer transitions 0/282 dead transitions. [2024-06-28 03:10:21,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 282 transitions, 3794 flow [2024-06-28 03:10:21,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:10:21,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:10:21,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-28 03:10:21,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-06-28 03:10:21,928 INFO L175 Difference]: Start difference. First operand has 128 places, 223 transitions, 2806 flow. Second operand 8 states and 224 transitions. [2024-06-28 03:10:21,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 282 transitions, 3794 flow [2024-06-28 03:10:22,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 282 transitions, 3463 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-28 03:10:22,555 INFO L231 Difference]: Finished difference. Result has 130 places, 226 transitions, 2864 flow [2024-06-28 03:10:22,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2475, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2864, PETRI_PLACES=130, PETRI_TRANSITIONS=226} [2024-06-28 03:10:22,555 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 75 predicate places. [2024-06-28 03:10:22,555 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 226 transitions, 2864 flow [2024-06-28 03:10:22,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:22,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:10:22,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:10:22,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 03:10:22,556 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)] === [2024-06-28 03:10:22,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:10:22,556 INFO L85 PathProgramCache]: Analyzing trace with hash -25438718, now seen corresponding path program 4 times [2024-06-28 03:10:22,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:10:22,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229531008] [2024-06-28 03:10:22,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:10:22,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:10:22,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:10:23,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:10:23,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:10:23,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229531008] [2024-06-28 03:10:23,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229531008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:10:23,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:10:23,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:10:23,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69443311] [2024-06-28 03:10:23,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:10:23,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:10:23,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:10:23,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:10:23,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:10:23,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-28 03:10:23,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 226 transitions, 2864 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:23,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:10:23,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-28 03:10:23,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:10:26,242 INFO L124 PetriNetUnfolderBase]: 12531/17750 cut-off events. [2024-06-28 03:10:26,243 INFO L125 PetriNetUnfolderBase]: For 471429/471462 co-relation queries the response was YES. [2024-06-28 03:10:26,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112096 conditions, 17750 events. 12531/17750 cut-off events. For 471429/471462 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 103377 event pairs, 3605 based on Foata normal form. 40/17736 useless extension candidates. Maximal degree in co-relation 112041. Up to 13178 conditions per place. [2024-06-28 03:10:26,394 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 125 selfloop transitions, 158 changer transitions 0/290 dead transitions. [2024-06-28 03:10:26,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 290 transitions, 3898 flow [2024-06-28 03:10:26,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:10:26,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:10:26,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-28 03:10:26,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5504807692307693 [2024-06-28 03:10:26,396 INFO L175 Difference]: Start difference. First operand has 130 places, 226 transitions, 2864 flow. Second operand 8 states and 229 transitions. [2024-06-28 03:10:26,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 290 transitions, 3898 flow [2024-06-28 03:10:27,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 290 transitions, 3545 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-28 03:10:27,017 INFO L231 Difference]: Finished difference. Result has 132 places, 229 transitions, 2925 flow [2024-06-28 03:10:27,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2511, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2925, PETRI_PLACES=132, PETRI_TRANSITIONS=229} [2024-06-28 03:10:27,017 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 77 predicate places. [2024-06-28 03:10:27,017 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 229 transitions, 2925 flow [2024-06-28 03:10:27,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:27,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:10:27,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:10:27,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 03:10:27,018 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 03:10:27,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:10:27,018 INFO L85 PathProgramCache]: Analyzing trace with hash 361623925, now seen corresponding path program 2 times [2024-06-28 03:10:27,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:10:27,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293968962] [2024-06-28 03:10:27,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:10:27,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:10:27,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:10:27,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:10:27,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:10:27,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293968962] [2024-06-28 03:10:27,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293968962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:10:27,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:10:27,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:10:27,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764113221] [2024-06-28 03:10:27,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:10:27,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:10:27,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:10:27,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:10:27,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:10:27,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-28 03:10:27,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 229 transitions, 2925 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:27,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:10:27,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-28 03:10:27,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:10:30,517 INFO L124 PetriNetUnfolderBase]: 12509/17684 cut-off events. [2024-06-28 03:10:30,518 INFO L125 PetriNetUnfolderBase]: For 495266/495296 co-relation queries the response was YES. [2024-06-28 03:10:30,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113691 conditions, 17684 events. 12509/17684 cut-off events. For 495266/495296 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 102386 event pairs, 4345 based on Foata normal form. 26/17700 useless extension candidates. Maximal degree in co-relation 113635. Up to 16963 conditions per place. [2024-06-28 03:10:30,660 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 217 selfloop transitions, 29 changer transitions 0/253 dead transitions. [2024-06-28 03:10:30,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 253 transitions, 3503 flow [2024-06-28 03:10:30,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:10:30,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:10:30,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-28 03:10:30,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47435897435897434 [2024-06-28 03:10:30,662 INFO L175 Difference]: Start difference. First operand has 132 places, 229 transitions, 2925 flow. Second operand 6 states and 148 transitions. [2024-06-28 03:10:30,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 253 transitions, 3503 flow [2024-06-28 03:10:31,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 253 transitions, 3093 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-28 03:10:31,422 INFO L231 Difference]: Finished difference. Result has 132 places, 229 transitions, 2585 flow [2024-06-28 03:10:31,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2515, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2585, PETRI_PLACES=132, PETRI_TRANSITIONS=229} [2024-06-28 03:10:31,423 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 77 predicate places. [2024-06-28 03:10:31,423 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 229 transitions, 2585 flow [2024-06-28 03:10:31,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:31,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:10:31,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:10:31,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 03:10:31,423 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 03:10:31,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:10:31,424 INFO L85 PathProgramCache]: Analyzing trace with hash -878413871, now seen corresponding path program 1 times [2024-06-28 03:10:31,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:10:31,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440191889] [2024-06-28 03:10:31,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:10:31,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:10:31,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:10:32,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:10:32,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:10:32,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440191889] [2024-06-28 03:10:32,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440191889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:10:32,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:10:32,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:10:32,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137721922] [2024-06-28 03:10:32,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:10:32,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:10:32,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:10:32,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:10:32,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:10:32,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-28 03:10:32,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 229 transitions, 2585 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:32,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:10:32,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-28 03:10:32,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:10:34,512 INFO L124 PetriNetUnfolderBase]: 11377/16510 cut-off events. [2024-06-28 03:10:34,512 INFO L125 PetriNetUnfolderBase]: For 434461/434463 co-relation queries the response was YES. [2024-06-28 03:10:34,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100874 conditions, 16510 events. 11377/16510 cut-off events. For 434461/434463 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 99232 event pairs, 3898 based on Foata normal form. 8/16448 useless extension candidates. Maximal degree in co-relation 100817. Up to 15423 conditions per place. [2024-06-28 03:10:34,655 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 226 selfloop transitions, 25 changer transitions 0/259 dead transitions. [2024-06-28 03:10:34,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 259 transitions, 3316 flow [2024-06-28 03:10:34,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:10:34,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:10:34,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-28 03:10:34,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5160256410256411 [2024-06-28 03:10:34,656 INFO L175 Difference]: Start difference. First operand has 132 places, 229 transitions, 2585 flow. Second operand 6 states and 161 transitions. [2024-06-28 03:10:34,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 259 transitions, 3316 flow [2024-06-28 03:10:35,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 259 transitions, 3235 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 03:10:35,226 INFO L231 Difference]: Finished difference. Result has 133 places, 233 transitions, 2620 flow [2024-06-28 03:10:35,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2504, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2620, PETRI_PLACES=133, PETRI_TRANSITIONS=233} [2024-06-28 03:10:35,226 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 78 predicate places. [2024-06-28 03:10:35,226 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 233 transitions, 2620 flow [2024-06-28 03:10:35,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:35,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:10:35,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:10:35,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 03:10:35,227 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 03:10:35,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:10:35,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1020334383, now seen corresponding path program 2 times [2024-06-28 03:10:35,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:10:35,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311181569] [2024-06-28 03:10:35,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:10:35,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:10:35,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:10:36,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:10:36,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:10:36,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311181569] [2024-06-28 03:10:36,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311181569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:10:36,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:10:36,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:10:36,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364691272] [2024-06-28 03:10:36,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:10:36,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:10:36,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:10:36,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:10:36,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:10:36,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-28 03:10:36,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 233 transitions, 2620 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:36,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:10:36,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-28 03:10:36,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:10:38,548 INFO L124 PetriNetUnfolderBase]: 11225/16234 cut-off events. [2024-06-28 03:10:38,549 INFO L125 PetriNetUnfolderBase]: For 452518/452526 co-relation queries the response was YES. [2024-06-28 03:10:38,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100653 conditions, 16234 events. 11225/16234 cut-off events. For 452518/452526 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 96601 event pairs, 3806 based on Foata normal form. 5/16170 useless extension candidates. Maximal degree in co-relation 100595. Up to 15207 conditions per place. [2024-06-28 03:10:38,695 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 220 selfloop transitions, 26 changer transitions 0/254 dead transitions. [2024-06-28 03:10:38,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 254 transitions, 3174 flow [2024-06-28 03:10:38,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:10:38,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:10:38,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-28 03:10:38,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5032051282051282 [2024-06-28 03:10:38,696 INFO L175 Difference]: Start difference. First operand has 133 places, 233 transitions, 2620 flow. Second operand 6 states and 157 transitions. [2024-06-28 03:10:38,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 254 transitions, 3174 flow [2024-06-28 03:10:39,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 254 transitions, 3119 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-28 03:10:39,232 INFO L231 Difference]: Finished difference. Result has 136 places, 233 transitions, 2626 flow [2024-06-28 03:10:39,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2565, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2626, PETRI_PLACES=136, PETRI_TRANSITIONS=233} [2024-06-28 03:10:39,233 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 81 predicate places. [2024-06-28 03:10:39,233 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 233 transitions, 2626 flow [2024-06-28 03:10:39,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:39,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:10:39,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:10:39,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 03:10:39,234 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 03:10:39,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:10:39,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1607920734, now seen corresponding path program 1 times [2024-06-28 03:10:39,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:10:39,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92840084] [2024-06-28 03:10:39,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:10:39,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:10:39,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:10:40,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:10:40,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:10:40,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92840084] [2024-06-28 03:10:40,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92840084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:10:40,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:10:40,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:10:40,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348757947] [2024-06-28 03:10:40,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:10:40,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:10:40,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:10:40,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:10:40,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:10:40,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-28 03:10:40,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 233 transitions, 2626 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:40,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:10:40,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-28 03:10:40,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:10:43,293 INFO L124 PetriNetUnfolderBase]: 14630/21075 cut-off events. [2024-06-28 03:10:43,294 INFO L125 PetriNetUnfolderBase]: For 705837/705845 co-relation queries the response was YES. [2024-06-28 03:10:43,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134697 conditions, 21075 events. 14630/21075 cut-off events. For 705837/705845 co-relation queries the response was YES. Maximal size of possible extension queue 803. Compared 130509 event pairs, 3853 based on Foata normal form. 91/21150 useless extension candidates. Maximal degree in co-relation 134638. Up to 12171 conditions per place. [2024-06-28 03:10:43,509 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 175 selfloop transitions, 132 changer transitions 0/314 dead transitions. [2024-06-28 03:10:43,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 314 transitions, 4104 flow [2024-06-28 03:10:43,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:10:43,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:10:43,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 239 transitions. [2024-06-28 03:10:43,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745192307692307 [2024-06-28 03:10:43,510 INFO L175 Difference]: Start difference. First operand has 136 places, 233 transitions, 2626 flow. Second operand 8 states and 239 transitions. [2024-06-28 03:10:43,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 314 transitions, 4104 flow [2024-06-28 03:10:44,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 314 transitions, 4012 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-28 03:10:44,262 INFO L231 Difference]: Finished difference. Result has 139 places, 241 transitions, 3098 flow [2024-06-28 03:10:44,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2534, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3098, PETRI_PLACES=139, PETRI_TRANSITIONS=241} [2024-06-28 03:10:44,262 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 84 predicate places. [2024-06-28 03:10:44,263 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 241 transitions, 3098 flow [2024-06-28 03:10:44,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:44,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:10:44,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:10:44,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 03:10:44,263 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 03:10:44,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:10:44,264 INFO L85 PathProgramCache]: Analyzing trace with hash 2070956812, now seen corresponding path program 2 times [2024-06-28 03:10:44,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:10:44,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186992810] [2024-06-28 03:10:44,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:10:44,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:10:44,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:10:45,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:10:45,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:10:45,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186992810] [2024-06-28 03:10:45,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186992810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:10:45,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:10:45,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:10:45,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556049561] [2024-06-28 03:10:45,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:10:45,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:10:45,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:10:45,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:10:45,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:10:45,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-28 03:10:45,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 241 transitions, 3098 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:45,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:10:45,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-28 03:10:45,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:10:49,099 INFO L124 PetriNetUnfolderBase]: 16178/23491 cut-off events. [2024-06-28 03:10:49,100 INFO L125 PetriNetUnfolderBase]: For 865298/865306 co-relation queries the response was YES. [2024-06-28 03:10:49,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158216 conditions, 23491 events. 16178/23491 cut-off events. For 865298/865306 co-relation queries the response was YES. Maximal size of possible extension queue 966. Compared 150993 event pairs, 5348 based on Foata normal form. 91/23567 useless extension candidates. Maximal degree in co-relation 158155. Up to 17106 conditions per place. [2024-06-28 03:10:49,341 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 163 selfloop transitions, 142 changer transitions 0/312 dead transitions. [2024-06-28 03:10:49,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 312 transitions, 4424 flow [2024-06-28 03:10:49,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:10:49,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:10:49,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-06-28 03:10:49,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-28 03:10:49,342 INFO L175 Difference]: Start difference. First operand has 139 places, 241 transitions, 3098 flow. Second operand 8 states and 234 transitions. [2024-06-28 03:10:49,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 312 transitions, 4424 flow [2024-06-28 03:10:50,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 312 transitions, 4207 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-28 03:10:50,995 INFO L231 Difference]: Finished difference. Result has 145 places, 247 transitions, 3385 flow [2024-06-28 03:10:50,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2881, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3385, PETRI_PLACES=145, PETRI_TRANSITIONS=247} [2024-06-28 03:10:50,996 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 90 predicate places. [2024-06-28 03:10:50,996 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 247 transitions, 3385 flow [2024-06-28 03:10:50,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:50,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:10:50,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:10:50,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 03:10:50,997 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 03:10:50,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:10:50,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1638640057, now seen corresponding path program 1 times [2024-06-28 03:10:50,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:10:50,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730330144] [2024-06-28 03:10:50,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:10:50,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:10:51,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:10:51,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:10:51,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:10:51,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730330144] [2024-06-28 03:10:51,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730330144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:10:51,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:10:51,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:10:51,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831114582] [2024-06-28 03:10:51,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:10:51,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:10:51,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:10:51,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:10:51,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:10:51,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-28 03:10:51,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 247 transitions, 3385 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:51,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:10:51,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-28 03:10:51,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand