./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix015.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/protection/mix015.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b44c8288 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/mix015.opt.i ./goblint.2024-05-07_14-17-48.files/protection/mix015.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 --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.witness-ghost-b44c828-m [2024-05-12 13:09:46,721 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 13:09:46,804 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 13:09:46,811 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 13:09:46,811 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 13:09:46,843 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 13:09:46,843 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 13:09:46,843 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 13:09:46,844 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 13:09:46,848 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 13:09:46,848 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 13:09:46,848 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 13:09:46,849 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 13:09:46,850 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 13:09:46,850 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 13:09:46,850 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 13:09:46,851 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 13:09:46,851 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 13:09:46,851 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 13:09:46,851 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 13:09:46,852 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 13:09:46,852 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 13:09:46,852 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 13:09:46,852 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 13:09:46,853 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 13:09:46,853 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 13:09:46,853 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 13:09:46,853 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 13:09:46,854 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 13:09:46,854 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 13:09:46,855 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 13:09:46,855 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 13:09:46,855 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 13:09:46,855 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 13:09:46,855 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 13:09:46,856 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 13:09:46,856 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 13:09:46,856 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 13:09:46,856 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 13:09:46,856 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 13:09:46,856 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 13:09:46,857 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 13:09:46,857 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 13:09:46,857 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 13:09:47,157 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 13:09:47,185 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 13:09:47,187 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 13:09:47,188 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 13:09:47,189 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 13:09:47,190 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix015.opt.i [2024-05-12 13:09:48,272 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 13:09:48,534 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 13:09:48,534 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix015.opt.i [2024-05-12 13:09:48,547 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26b2bcf5d/44e2efa3ff9e4de0988b78d5d80a85be/FLAGe9350ac26 [2024-05-12 13:09:48,560 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26b2bcf5d/44e2efa3ff9e4de0988b78d5d80a85be [2024-05-12 13:09:48,562 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 13:09:48,563 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 13:09:48,563 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/protection/mix015.opt.yml/witness.yml [2024-05-12 13:09:48,754 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 13:09:48,756 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 13:09:48,757 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 13:09:48,757 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 13:09:48,762 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 13:09:48,762 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 01:09:48" (1/2) ... [2024-05-12 13:09:48,763 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@442de1a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:09:48, skipping insertion in model container [2024-05-12 13:09:48,763 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 01:09:48" (1/2) ... [2024-05-12 13:09:48,766 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2744fab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:09:48, skipping insertion in model container [2024-05-12 13:09:48,766 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 01:09:48" (2/2) ... [2024-05-12 13:09:48,767 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@442de1a4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:09:48, skipping insertion in model container [2024-05-12 13:09:48,767 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 01:09:48" (2/2) ... [2024-05-12 13:09:48,767 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 13:09:48,866 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 13:09:48,868 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-05-12 13:09:48,868 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] (((((((((((((((((((((! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-05-12 13:09:48,868 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] (((((((((((((((((((((! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-05-12 13:09:48,868 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 13:09:48,869 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-05-12 13:09:48,918 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 13:09:49,085 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix015.opt.i[944,957] [2024-05-12 13:09:49,261 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 13:09:49,270 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-05-12 13:09:49,306 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix015.opt.i[944,957] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 13:09:49,412 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 13:09:49,451 INFO L206 MainTranslator]: Completed translation [2024-05-12 13:09:49,451 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:09:49 WrapperNode [2024-05-12 13:09:49,451 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 13:09:49,452 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 13:09:49,452 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 13:09:49,452 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 13:09:49,458 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 12.05 01:09:49" (1/1) ... [2024-05-12 13:09:49,474 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 12.05 01:09:49" (1/1) ... [2024-05-12 13:09:49,515 INFO L138 Inliner]: procedures = 176, calls = 60, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 157 [2024-05-12 13:09:49,516 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 13:09:49,516 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 13:09:49,516 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 13:09:49,517 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 13:09:49,526 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:09:49" (1/1) ... [2024-05-12 13:09:49,527 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:09:49" (1/1) ... [2024-05-12 13:09:49,532 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:09:49" (1/1) ... [2024-05-12 13:09:49,551 INFO L175 MemorySlicer]: Split 5 memory accesses to 4 slices as follows [2, 1, 1, 1]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-05-12 13:09:49,554 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:09:49" (1/1) ... [2024-05-12 13:09:49,555 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:09:49" (1/1) ... [2024-05-12 13:09:49,565 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:09:49" (1/1) ... [2024-05-12 13:09:49,576 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:09:49" (1/1) ... [2024-05-12 13:09:49,587 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:09:49" (1/1) ... [2024-05-12 13:09:49,589 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:09:49" (1/1) ... [2024-05-12 13:09:49,611 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 13:09:49,611 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 13:09:49,612 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 13:09:49,612 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 13:09:49,612 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:09:49" (1/1) ... [2024-05-12 13:09:49,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 13:09:49,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 13:09:49,687 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) [2024-05-12 13:09:49,715 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 [2024-05-12 13:09:49,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 13:09:49,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 13:09:49,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 13:09:49,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-05-12 13:09:49,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 13:09:49,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 13:09:49,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 13:09:49,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 13:09:49,731 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-05-12 13:09:49,731 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-05-12 13:09:49,732 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-05-12 13:09:49,732 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-05-12 13:09:49,732 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-05-12 13:09:49,733 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-05-12 13:09:49,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 13:09:49,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 13:09:49,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 13:09:49,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-05-12 13:09:49,735 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 13:09:49,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 13:09:49,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 13:09:49,738 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-05-12 13:09:49,895 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 13:09:49,897 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 13:09:50,263 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 13:09:50,263 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 13:09:50,440 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 13:09:50,440 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-05-12 13:09:50,441 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 01:09:50 BoogieIcfgContainer [2024-05-12 13:09:50,441 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 13:09:50,444 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 13:09:50,444 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 13:09:50,447 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 13:09:50,447 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 01:09:48" (1/4) ... [2024-05-12 13:09:50,448 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@693ab096 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 01:09:50, skipping insertion in model container [2024-05-12 13:09:50,448 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 01:09:48" (2/4) ... [2024-05-12 13:09:50,448 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@693ab096 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 01:09:50, skipping insertion in model container [2024-05-12 13:09:50,448 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:09:49" (3/4) ... [2024-05-12 13:09:50,449 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@693ab096 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 01:09:50, skipping insertion in model container [2024-05-12 13:09:50,449 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 01:09:50" (4/4) ... [2024-05-12 13:09:50,450 INFO L112 eAbstractionObserver]: Analyzing ICFG mix015.opt.i [2024-05-12 13:09:50,466 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 13:09:50,466 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-05-12 13:09:50,467 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 13:09:50,541 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-05-12 13:09:50,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 50 transitions, 112 flow [2024-05-12 13:09:50,617 INFO L124 PetriNetUnfolderBase]: 1/47 cut-off events. [2024-05-12 13:09:50,617 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 13:09:50,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57 conditions, 47 events. 1/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 85 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2024-05-12 13:09:50,621 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 50 transitions, 112 flow [2024-05-12 13:09:50,626 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 47 transitions, 103 flow [2024-05-12 13:09:50,641 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 13:09:50,649 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;@1e8ca21d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 13:09:50,649 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-05-12 13:09:50,653 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 13:09:50,653 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-05-12 13:09:50,654 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 13:09:50,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:50,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 13:09:50,655 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:50,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:50,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1415977340, now seen corresponding path program 1 times [2024-05-12 13:09:50,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:50,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992456635] [2024-05-12 13:09:50,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:50,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:50,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:52,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:09:52,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:52,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992456635] [2024-05-12 13:09:52,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992456635] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:52,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:52,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 13:09:52,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647451969] [2024-05-12 13:09:52,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:52,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 13:09:52,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:52,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 13:09:52,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 13:09:52,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-05-12 13:09:52,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 47 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:52,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:52,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-05-12 13:09:52,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:52,946 INFO L124 PetriNetUnfolderBase]: 3005/5081 cut-off events. [2024-05-12 13:09:52,946 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-05-12 13:09:52,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9498 conditions, 5081 events. 3005/5081 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 34146 event pairs, 2435 based on Foata normal form. 151/4806 useless extension candidates. Maximal degree in co-relation 9483. Up to 4336 conditions per place. [2024-05-12 13:09:52,983 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 42 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2024-05-12 13:09:52,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 61 transitions, 231 flow [2024-05-12 13:09:52,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 13:09:52,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 13:09:52,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-05-12 13:09:52,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6866666666666666 [2024-05-12 13:09:52,996 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 103 flow. Second operand 3 states and 103 transitions. [2024-05-12 13:09:52,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 61 transitions, 231 flow [2024-05-12 13:09:53,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 61 transitions, 226 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 13:09:53,006 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 135 flow [2024-05-12 13:09:53,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2024-05-12 13:09:53,011 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 0 predicate places. [2024-05-12 13:09:53,011 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 135 flow [2024-05-12 13:09:53,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:53,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:53,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:53,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 13:09:53,012 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:53,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:53,013 INFO L85 PathProgramCache]: Analyzing trace with hash 750462691, now seen corresponding path program 1 times [2024-05-12 13:09:53,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:53,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122363080] [2024-05-12 13:09:53,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:53,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:53,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:54,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:09:54,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:54,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122363080] [2024-05-12 13:09:54,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122363080] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:54,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:54,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 13:09:54,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960605467] [2024-05-12 13:09:54,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:54,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 13:09:54,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:54,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 13:09:54,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 13:09:54,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-05-12 13:09:54,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:54,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:54,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-05-12 13:09:54,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:54,916 INFO L124 PetriNetUnfolderBase]: 3428/5163 cut-off events. [2024-05-12 13:09:54,916 INFO L125 PetriNetUnfolderBase]: For 775/775 co-relation queries the response was YES. [2024-05-12 13:09:54,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11375 conditions, 5163 events. 3428/5163 cut-off events. For 775/775 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 30768 event pairs, 1817 based on Foata normal form. 3/4921 useless extension candidates. Maximal degree in co-relation 11360. Up to 4908 conditions per place. [2024-05-12 13:09:54,949 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 54 selfloop transitions, 9 changer transitions 0/76 dead transitions. [2024-05-12 13:09:54,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 76 transitions, 327 flow [2024-05-12 13:09:54,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 13:09:54,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 13:09:54,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2024-05-12 13:09:54,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-05-12 13:09:54,957 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 135 flow. Second operand 4 states and 130 transitions. [2024-05-12 13:09:54,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 76 transitions, 327 flow [2024-05-12 13:09:54,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 76 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 13:09:54,961 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 181 flow [2024-05-12 13:09:54,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-05-12 13:09:54,963 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2024-05-12 13:09:54,963 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 181 flow [2024-05-12 13:09:54,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:54,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:54,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:54,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 13:09:54,964 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:54,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:54,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1789508677, now seen corresponding path program 1 times [2024-05-12 13:09:54,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:54,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052897882] [2024-05-12 13:09:54,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:54,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:54,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:55,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:09:55,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:55,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052897882] [2024-05-12 13:09:55,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052897882] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:55,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:55,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 13:09:55,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697167836] [2024-05-12 13:09:55,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:55,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 13:09:55,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:55,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 13:09:55,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 13:09:55,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:09:55,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:55,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:55,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:09:55,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:56,814 INFO L124 PetriNetUnfolderBase]: 4170/6657 cut-off events. [2024-05-12 13:09:56,814 INFO L125 PetriNetUnfolderBase]: For 2434/2434 co-relation queries the response was YES. [2024-05-12 13:09:56,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15443 conditions, 6657 events. 4170/6657 cut-off events. For 2434/2434 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 42457 event pairs, 2241 based on Foata normal form. 3/6236 useless extension candidates. Maximal degree in co-relation 15426. Up to 5928 conditions per place. [2024-05-12 13:09:56,874 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 66 selfloop transitions, 13 changer transitions 0/91 dead transitions. [2024-05-12 13:09:56,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 91 transitions, 437 flow [2024-05-12 13:09:56,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 13:09:56,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 13:09:56,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 157 transitions. [2024-05-12 13:09:56,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.628 [2024-05-12 13:09:56,877 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 181 flow. Second operand 5 states and 157 transitions. [2024-05-12 13:09:56,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 91 transitions, 437 flow [2024-05-12 13:09:56,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 91 transitions, 418 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-05-12 13:09:56,882 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 227 flow [2024-05-12 13:09:56,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=227, PETRI_PLACES=62, PETRI_TRANSITIONS=58} [2024-05-12 13:09:56,883 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2024-05-12 13:09:56,883 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 227 flow [2024-05-12 13:09:56,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:56,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:56,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:56,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 13:09:56,884 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:56,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:56,885 INFO L85 PathProgramCache]: Analyzing trace with hash -359804094, now seen corresponding path program 1 times [2024-05-12 13:09:56,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:56,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767120005] [2024-05-12 13:09:56,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:56,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:56,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:58,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:09:58,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:58,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767120005] [2024-05-12 13:09:58,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767120005] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:58,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:58,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 13:09:58,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64778764] [2024-05-12 13:09:58,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:58,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 13:09:58,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:58,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 13:09:58,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 13:09:58,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:09:58,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 58 transitions, 227 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:58,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:58,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:09:58,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:58,990 INFO L124 PetriNetUnfolderBase]: 4163/6880 cut-off events. [2024-05-12 13:09:58,990 INFO L125 PetriNetUnfolderBase]: For 4728/4728 co-relation queries the response was YES. [2024-05-12 13:09:59,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16954 conditions, 6880 events. 4163/6880 cut-off events. For 4728/4728 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 46248 event pairs, 2406 based on Foata normal form. 3/6433 useless extension candidates. Maximal degree in co-relation 16936. Up to 5895 conditions per place. [2024-05-12 13:09:59,034 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 77 selfloop transitions, 17 changer transitions 0/106 dead transitions. [2024-05-12 13:09:59,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 106 transitions, 545 flow [2024-05-12 13:09:59,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:09:59,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:09:59,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-05-12 13:09:59,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6233333333333333 [2024-05-12 13:09:59,036 INFO L175 Difference]: Start difference. First operand has 62 places, 58 transitions, 227 flow. Second operand 6 states and 187 transitions. [2024-05-12 13:09:59,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 106 transitions, 545 flow [2024-05-12 13:09:59,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 106 transitions, 512 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-05-12 13:09:59,043 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 273 flow [2024-05-12 13:09:59,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=273, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2024-05-12 13:09:59,044 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 9 predicate places. [2024-05-12 13:09:59,045 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 273 flow [2024-05-12 13:09:59,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:59,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:59,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:59,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 13:09:59,046 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:59,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:59,046 INFO L85 PathProgramCache]: Analyzing trace with hash 552710243, now seen corresponding path program 1 times [2024-05-12 13:09:59,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:59,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833563747] [2024-05-12 13:09:59,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:59,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:59,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:59,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:09:59,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:59,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833563747] [2024-05-12 13:09:59,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833563747] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:59,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:59,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 13:09:59,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170690122] [2024-05-12 13:09:59,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:59,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 13:09:59,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:59,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 13:09:59,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-05-12 13:10:00,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:10:00,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 273 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:00,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:00,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:10:00,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:01,178 INFO L124 PetriNetUnfolderBase]: 4692/7170 cut-off events. [2024-05-12 13:10:01,181 INFO L125 PetriNetUnfolderBase]: For 7177/7177 co-relation queries the response was YES. [2024-05-12 13:10:01,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19842 conditions, 7170 events. 4692/7170 cut-off events. For 7177/7177 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 42948 event pairs, 1825 based on Foata normal form. 4/6892 useless extension candidates. Maximal degree in co-relation 19823. Up to 6639 conditions per place. [2024-05-12 13:10:01,222 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 65 selfloop transitions, 10 changer transitions 0/88 dead transitions. [2024-05-12 13:10:01,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 88 transitions, 499 flow [2024-05-12 13:10:01,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 13:10:01,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 13:10:01,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-05-12 13:10:01,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564 [2024-05-12 13:10:01,230 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 273 flow. Second operand 5 states and 141 transitions. [2024-05-12 13:10:01,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 88 transitions, 499 flow [2024-05-12 13:10:01,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 88 transitions, 452 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-05-12 13:10:01,239 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 289 flow [2024-05-12 13:10:01,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=289, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2024-05-12 13:10:01,242 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2024-05-12 13:10:01,242 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 289 flow [2024-05-12 13:10:01,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:01,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:01,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:01,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 13:10:01,243 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:01,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:01,243 INFO L85 PathProgramCache]: Analyzing trace with hash -80988729, now seen corresponding path program 1 times [2024-05-12 13:10:01,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:01,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67937892] [2024-05-12 13:10:01,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:01,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:01,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:01,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:01,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:01,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67937892] [2024-05-12 13:10:01,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67937892] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:01,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:01,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 13:10:01,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268833650] [2024-05-12 13:10:01,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:01,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 13:10:01,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:01,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 13:10:01,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 13:10:01,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 50 [2024-05-12 13:10:01,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 289 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:01,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:01,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 50 [2024-05-12 13:10:01,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:01,663 INFO L124 PetriNetUnfolderBase]: 1319/2568 cut-off events. [2024-05-12 13:10:01,664 INFO L125 PetriNetUnfolderBase]: For 3330/3501 co-relation queries the response was YES. [2024-05-12 13:10:01,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6253 conditions, 2568 events. 1319/2568 cut-off events. For 3330/3501 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 18903 event pairs, 254 based on Foata normal form. 2/2367 useless extension candidates. Maximal degree in co-relation 6232. Up to 1603 conditions per place. [2024-05-12 13:10:01,684 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 28 selfloop transitions, 7 changer transitions 0/68 dead transitions. [2024-05-12 13:10:01,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 68 transitions, 332 flow [2024-05-12 13:10:01,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 13:10:01,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 13:10:01,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 109 transitions. [2024-05-12 13:10:01,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7266666666666667 [2024-05-12 13:10:01,685 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 289 flow. Second operand 3 states and 109 transitions. [2024-05-12 13:10:01,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 68 transitions, 332 flow [2024-05-12 13:10:01,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 68 transitions, 310 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-05-12 13:10:01,690 INFO L231 Difference]: Finished difference. Result has 64 places, 60 transitions, 238 flow [2024-05-12 13:10:01,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=64, PETRI_TRANSITIONS=60} [2024-05-12 13:10:01,692 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 8 predicate places. [2024-05-12 13:10:01,693 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 60 transitions, 238 flow [2024-05-12 13:10:01,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:01,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:01,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:01,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 13:10:01,693 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:01,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:01,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1688776048, now seen corresponding path program 1 times [2024-05-12 13:10:01,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:01,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980588874] [2024-05-12 13:10:01,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:01,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:01,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:02,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:02,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:02,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980588874] [2024-05-12 13:10:02,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980588874] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:02,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:02,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:10:02,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584421654] [2024-05-12 13:10:02,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:02,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:10:02,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:02,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:10:02,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:10:02,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:10:02,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 60 transitions, 238 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:02,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:02,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:10:02,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:03,870 INFO L124 PetriNetUnfolderBase]: 4788/7074 cut-off events. [2024-05-12 13:10:03,870 INFO L125 PetriNetUnfolderBase]: For 12307/12307 co-relation queries the response was YES. [2024-05-12 13:10:03,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20320 conditions, 7074 events. 4788/7074 cut-off events. For 12307/12307 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 40176 event pairs, 1749 based on Foata normal form. 4/7068 useless extension candidates. Maximal degree in co-relation 20300. Up to 6662 conditions per place. [2024-05-12 13:10:03,921 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 85 selfloop transitions, 24 changer transitions 1/122 dead transitions. [2024-05-12 13:10:03,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 122 transitions, 684 flow [2024-05-12 13:10:03,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:10:03,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:10:03,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-05-12 13:10:03,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5685714285714286 [2024-05-12 13:10:03,923 INFO L175 Difference]: Start difference. First operand has 64 places, 60 transitions, 238 flow. Second operand 7 states and 199 transitions. [2024-05-12 13:10:03,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 122 transitions, 684 flow [2024-05-12 13:10:03,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 122 transitions, 662 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 13:10:03,931 INFO L231 Difference]: Finished difference. Result has 71 places, 75 transitions, 393 flow [2024-05-12 13:10:03,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=393, PETRI_PLACES=71, PETRI_TRANSITIONS=75} [2024-05-12 13:10:03,932 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-05-12 13:10:03,932 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 75 transitions, 393 flow [2024-05-12 13:10:03,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:03,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:03,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:03,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 13:10:03,933 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:03,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:03,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1393947262, now seen corresponding path program 2 times [2024-05-12 13:10:03,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:03,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735272336] [2024-05-12 13:10:03,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:03,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:03,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:05,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:05,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:05,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735272336] [2024-05-12 13:10:05,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735272336] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:05,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:05,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:10:05,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689516134] [2024-05-12 13:10:05,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:05,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:10:05,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:05,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:10:05,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:10:05,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:10:05,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 75 transitions, 393 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:05,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:05,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:10:05,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:06,210 INFO L124 PetriNetUnfolderBase]: 4884/7218 cut-off events. [2024-05-12 13:10:06,210 INFO L125 PetriNetUnfolderBase]: For 15687/15687 co-relation queries the response was YES. [2024-05-12 13:10:06,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22549 conditions, 7218 events. 4884/7218 cut-off events. For 15687/15687 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 40937 event pairs, 1756 based on Foata normal form. 6/7212 useless extension candidates. Maximal degree in co-relation 22525. Up to 6744 conditions per place. [2024-05-12 13:10:06,262 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 79 selfloop transitions, 28 changer transitions 1/120 dead transitions. [2024-05-12 13:10:06,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 120 transitions, 801 flow [2024-05-12 13:10:06,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:10:06,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:10:06,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-05-12 13:10:06,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5633333333333334 [2024-05-12 13:10:06,264 INFO L175 Difference]: Start difference. First operand has 71 places, 75 transitions, 393 flow. Second operand 6 states and 169 transitions. [2024-05-12 13:10:06,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 120 transitions, 801 flow [2024-05-12 13:10:06,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 120 transitions, 779 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-05-12 13:10:06,281 INFO L231 Difference]: Finished difference. Result has 75 places, 81 transitions, 500 flow [2024-05-12 13:10:06,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=500, PETRI_PLACES=75, PETRI_TRANSITIONS=81} [2024-05-12 13:10:06,282 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 19 predicate places. [2024-05-12 13:10:06,282 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 81 transitions, 500 flow [2024-05-12 13:10:06,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:06,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:06,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:06,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 13:10:06,283 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:06,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:06,283 INFO L85 PathProgramCache]: Analyzing trace with hash -2112335937, now seen corresponding path program 1 times [2024-05-12 13:10:06,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:06,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455193589] [2024-05-12 13:10:06,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:06,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:06,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:07,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:07,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:07,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455193589] [2024-05-12 13:10:07,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455193589] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:07,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:07,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:10:07,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082356360] [2024-05-12 13:10:07,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:07,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:10:07,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:07,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:10:07,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:10:07,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:10:07,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 81 transitions, 500 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) [2024-05-12 13:10:07,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:07,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:10:07,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:08,510 INFO L124 PetriNetUnfolderBase]: 4845/7101 cut-off events. [2024-05-12 13:10:08,511 INFO L125 PetriNetUnfolderBase]: For 17127/17127 co-relation queries the response was YES. [2024-05-12 13:10:08,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22520 conditions, 7101 events. 4845/7101 cut-off events. For 17127/17127 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 40157 event pairs, 1294 based on Foata normal form. 6/7086 useless extension candidates. Maximal degree in co-relation 22494. Up to 6751 conditions per place. [2024-05-12 13:10:08,561 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 109 selfloop transitions, 21 changer transitions 7/149 dead transitions. [2024-05-12 13:10:08,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 149 transitions, 972 flow [2024-05-12 13:10:08,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:10:08,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:10:08,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-05-12 13:10:08,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5725 [2024-05-12 13:10:08,564 INFO L175 Difference]: Start difference. First operand has 75 places, 81 transitions, 500 flow. Second operand 8 states and 229 transitions. [2024-05-12 13:10:08,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 149 transitions, 972 flow [2024-05-12 13:10:08,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 149 transitions, 905 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-05-12 13:10:08,585 INFO L231 Difference]: Finished difference. Result has 79 places, 84 transitions, 514 flow [2024-05-12 13:10:08,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=514, PETRI_PLACES=79, PETRI_TRANSITIONS=84} [2024-05-12 13:10:08,585 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 23 predicate places. [2024-05-12 13:10:08,586 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 84 transitions, 514 flow [2024-05-12 13:10:08,586 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) [2024-05-12 13:10:08,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:08,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:08,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 13:10:08,587 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:08,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:08,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1793061744, now seen corresponding path program 3 times [2024-05-12 13:10:08,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:08,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127062768] [2024-05-12 13:10:08,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:08,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:08,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:09,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:09,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:09,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127062768] [2024-05-12 13:10:09,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127062768] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:09,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:09,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:10:09,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619404186] [2024-05-12 13:10:09,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:09,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:10:09,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:09,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:10:09,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:10:09,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:10:09,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 514 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:09,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:09,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:10:09,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:10,594 INFO L124 PetriNetUnfolderBase]: 4245/6329 cut-off events. [2024-05-12 13:10:10,594 INFO L125 PetriNetUnfolderBase]: For 18394/18407 co-relation queries the response was YES. [2024-05-12 13:10:10,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20945 conditions, 6329 events. 4245/6329 cut-off events. For 18394/18407 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 35806 event pairs, 1244 based on Foata normal form. 16/6335 useless extension candidates. Maximal degree in co-relation 20919. Up to 5882 conditions per place. [2024-05-12 13:10:10,628 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 76 selfloop transitions, 28 changer transitions 0/116 dead transitions. [2024-05-12 13:10:10,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 116 transitions, 822 flow [2024-05-12 13:10:10,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:10:10,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:10:10,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-05-12 13:10:10,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5266666666666666 [2024-05-12 13:10:10,629 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 514 flow. Second operand 6 states and 158 transitions. [2024-05-12 13:10:10,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 116 transitions, 822 flow [2024-05-12 13:10:10,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 116 transitions, 745 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-05-12 13:10:10,647 INFO L231 Difference]: Finished difference. Result has 79 places, 84 transitions, 504 flow [2024-05-12 13:10:10,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=504, PETRI_PLACES=79, PETRI_TRANSITIONS=84} [2024-05-12 13:10:10,647 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 23 predicate places. [2024-05-12 13:10:10,648 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 84 transitions, 504 flow [2024-05-12 13:10:10,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:10,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:10,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:10,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-05-12 13:10:10,649 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:10,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:10,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1218472762, now seen corresponding path program 1 times [2024-05-12 13:10:10,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:10,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67650489] [2024-05-12 13:10:10,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:10,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:10,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:11,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:11,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:11,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67650489] [2024-05-12 13:10:11,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67650489] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:11,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:11,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:10:11,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006008746] [2024-05-12 13:10:11,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:11,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:10:11,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:11,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:10:11,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:10:11,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:10:11,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 504 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) [2024-05-12 13:10:11,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:11,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:10:11,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:12,814 INFO L124 PetriNetUnfolderBase]: 4503/6612 cut-off events. [2024-05-12 13:10:12,815 INFO L125 PetriNetUnfolderBase]: For 20640/20640 co-relation queries the response was YES. [2024-05-12 13:10:12,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22104 conditions, 6612 events. 4503/6612 cut-off events. For 20640/20640 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 36558 event pairs, 1174 based on Foata normal form. 4/6602 useless extension candidates. Maximal degree in co-relation 22076. Up to 6043 conditions per place. [2024-05-12 13:10:12,851 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 91 selfloop transitions, 35 changer transitions 0/136 dead transitions. [2024-05-12 13:10:12,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 136 transitions, 966 flow [2024-05-12 13:10:12,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:10:12,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:10:12,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-05-12 13:10:12,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5371428571428571 [2024-05-12 13:10:12,854 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 504 flow. Second operand 7 states and 188 transitions. [2024-05-12 13:10:12,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 136 transitions, 966 flow [2024-05-12 13:10:12,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 136 transitions, 895 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-05-12 13:10:12,869 INFO L231 Difference]: Finished difference. Result has 81 places, 90 transitions, 569 flow [2024-05-12 13:10:12,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=569, PETRI_PLACES=81, PETRI_TRANSITIONS=90} [2024-05-12 13:10:12,869 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 25 predicate places. [2024-05-12 13:10:12,869 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 90 transitions, 569 flow [2024-05-12 13:10:12,870 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) [2024-05-12 13:10:12,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:12,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:12,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-05-12 13:10:12,871 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:12,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:12,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1121566156, now seen corresponding path program 2 times [2024-05-12 13:10:12,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:12,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772314586] [2024-05-12 13:10:12,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:12,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:12,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:13,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:13,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:13,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772314586] [2024-05-12 13:10:13,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772314586] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:13,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:13,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:10:13,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229776971] [2024-05-12 13:10:13,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:13,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:10:13,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:13,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:10:13,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:10:14,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:10:14,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 90 transitions, 569 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) [2024-05-12 13:10:14,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:14,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:10:14,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:15,257 INFO L124 PetriNetUnfolderBase]: 4549/6669 cut-off events. [2024-05-12 13:10:15,258 INFO L125 PetriNetUnfolderBase]: For 24893/24893 co-relation queries the response was YES. [2024-05-12 13:10:15,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23444 conditions, 6669 events. 4549/6669 cut-off events. For 24893/24893 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 36708 event pairs, 1162 based on Foata normal form. 4/6661 useless extension candidates. Maximal degree in co-relation 23415. Up to 6082 conditions per place. [2024-05-12 13:10:15,296 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 93 selfloop transitions, 36 changer transitions 0/139 dead transitions. [2024-05-12 13:10:15,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 139 transitions, 1027 flow [2024-05-12 13:10:15,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:10:15,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:10:15,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-05-12 13:10:15,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5314285714285715 [2024-05-12 13:10:15,298 INFO L175 Difference]: Start difference. First operand has 81 places, 90 transitions, 569 flow. Second operand 7 states and 186 transitions. [2024-05-12 13:10:15,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 139 transitions, 1027 flow [2024-05-12 13:10:15,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 139 transitions, 970 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-05-12 13:10:15,317 INFO L231 Difference]: Finished difference. Result has 85 places, 93 transitions, 626 flow [2024-05-12 13:10:15,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=626, PETRI_PLACES=85, PETRI_TRANSITIONS=93} [2024-05-12 13:10:15,318 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 29 predicate places. [2024-05-12 13:10:15,318 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 93 transitions, 626 flow [2024-05-12 13:10:15,318 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) [2024-05-12 13:10:15,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:15,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:15,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-05-12 13:10:15,318 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:15,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:15,319 INFO L85 PathProgramCache]: Analyzing trace with hash -5066746, now seen corresponding path program 3 times [2024-05-12 13:10:15,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:15,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555654814] [2024-05-12 13:10:15,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:15,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:15,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:16,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:16,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:16,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555654814] [2024-05-12 13:10:16,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555654814] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:16,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:16,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:10:16,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527677448] [2024-05-12 13:10:16,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:16,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:10:16,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:16,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:10:16,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:10:16,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:10:16,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 93 transitions, 626 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) [2024-05-12 13:10:16,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:16,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:10:16,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:17,546 INFO L124 PetriNetUnfolderBase]: 4539/6662 cut-off events. [2024-05-12 13:10:17,546 INFO L125 PetriNetUnfolderBase]: For 27571/27584 co-relation queries the response was YES. [2024-05-12 13:10:17,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23842 conditions, 6662 events. 4539/6662 cut-off events. For 27571/27584 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 36771 event pairs, 1174 based on Foata normal form. 14/6664 useless extension candidates. Maximal degree in co-relation 23811. Up to 6074 conditions per place. [2024-05-12 13:10:17,578 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 89 selfloop transitions, 35 changer transitions 0/134 dead transitions. [2024-05-12 13:10:17,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 134 transitions, 998 flow [2024-05-12 13:10:17,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:10:17,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:10:17,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-05-12 13:10:17,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-05-12 13:10:17,580 INFO L175 Difference]: Start difference. First operand has 85 places, 93 transitions, 626 flow. Second operand 7 states and 180 transitions. [2024-05-12 13:10:17,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 134 transitions, 998 flow [2024-05-12 13:10:17,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 134 transitions, 920 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-05-12 13:10:17,621 INFO L231 Difference]: Finished difference. Result has 88 places, 93 transitions, 627 flow [2024-05-12 13:10:17,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=627, PETRI_PLACES=88, PETRI_TRANSITIONS=93} [2024-05-12 13:10:17,622 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 32 predicate places. [2024-05-12 13:10:17,622 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 93 transitions, 627 flow [2024-05-12 13:10:17,622 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) [2024-05-12 13:10:17,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:17,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:17,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-05-12 13:10:17,623 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:17,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:17,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1112984116, now seen corresponding path program 1 times [2024-05-12 13:10:17,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:17,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178984377] [2024-05-12 13:10:17,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:17,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:17,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:19,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:19,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:19,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178984377] [2024-05-12 13:10:19,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178984377] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:19,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:19,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:10:19,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312339383] [2024-05-12 13:10:19,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:19,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:10:19,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:19,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:10:19,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:10:19,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:10:19,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 93 transitions, 627 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:19,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:19,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:10:19,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:20,163 INFO L124 PetriNetUnfolderBase]: 3750/5804 cut-off events. [2024-05-12 13:10:20,163 INFO L125 PetriNetUnfolderBase]: For 25062/25062 co-relation queries the response was YES. [2024-05-12 13:10:20,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20538 conditions, 5804 events. 3750/5804 cut-off events. For 25062/25062 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 34095 event pairs, 1009 based on Foata normal form. 4/5784 useless extension candidates. Maximal degree in co-relation 20506. Up to 5273 conditions per place. [2024-05-12 13:10:20,196 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 105 selfloop transitions, 13 changer transitions 0/134 dead transitions. [2024-05-12 13:10:20,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 134 transitions, 1008 flow [2024-05-12 13:10:20,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:10:20,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:10:20,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-05-12 13:10:20,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-05-12 13:10:20,198 INFO L175 Difference]: Start difference. First operand has 88 places, 93 transitions, 627 flow. Second operand 7 states and 185 transitions. [2024-05-12 13:10:20,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 134 transitions, 1008 flow [2024-05-12 13:10:20,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 134 transitions, 902 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-05-12 13:10:20,224 INFO L231 Difference]: Finished difference. Result has 89 places, 98 transitions, 609 flow [2024-05-12 13:10:20,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=526, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=609, PETRI_PLACES=89, PETRI_TRANSITIONS=98} [2024-05-12 13:10:20,224 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 33 predicate places. [2024-05-12 13:10:20,225 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 98 transitions, 609 flow [2024-05-12 13:10:20,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:20,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:20,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:20,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-05-12 13:10:20,225 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:20,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:20,226 INFO L85 PathProgramCache]: Analyzing trace with hash -522175400, now seen corresponding path program 1 times [2024-05-12 13:10:20,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:20,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132693826] [2024-05-12 13:10:20,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:20,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:20,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:21,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:21,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:21,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132693826] [2024-05-12 13:10:21,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132693826] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:21,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:21,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 13:10:21,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640976182] [2024-05-12 13:10:21,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:21,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 13:10:21,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:21,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 13:10:21,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 13:10:21,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-05-12 13:10:21,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 98 transitions, 609 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:21,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:21,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-05-12 13:10:21,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:22,077 INFO L124 PetriNetUnfolderBase]: 3506/6074 cut-off events. [2024-05-12 13:10:22,077 INFO L125 PetriNetUnfolderBase]: For 28923/28928 co-relation queries the response was YES. [2024-05-12 13:10:22,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20850 conditions, 6074 events. 3506/6074 cut-off events. For 28923/28928 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 41574 event pairs, 1462 based on Foata normal form. 6/5930 useless extension candidates. Maximal degree in co-relation 20816. Up to 5095 conditions per place. [2024-05-12 13:10:22,127 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 92 selfloop transitions, 9 changer transitions 0/119 dead transitions. [2024-05-12 13:10:22,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 119 transitions, 902 flow [2024-05-12 13:10:22,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 13:10:22,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 13:10:22,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-05-12 13:10:22,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.528 [2024-05-12 13:10:22,129 INFO L175 Difference]: Start difference. First operand has 89 places, 98 transitions, 609 flow. Second operand 5 states and 132 transitions. [2024-05-12 13:10:22,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 119 transitions, 902 flow [2024-05-12 13:10:22,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 119 transitions, 855 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-05-12 13:10:22,162 INFO L231 Difference]: Finished difference. Result has 91 places, 105 transitions, 656 flow [2024-05-12 13:10:22,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=656, PETRI_PLACES=91, PETRI_TRANSITIONS=105} [2024-05-12 13:10:22,164 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 35 predicate places. [2024-05-12 13:10:22,164 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 105 transitions, 656 flow [2024-05-12 13:10:22,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:22,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:22,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:22,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-05-12 13:10:22,165 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:22,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:22,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1897595645, now seen corresponding path program 1 times [2024-05-12 13:10:22,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:22,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230479730] [2024-05-12 13:10:22,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:22,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:22,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:23,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:23,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:23,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230479730] [2024-05-12 13:10:23,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230479730] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:23,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:23,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:10:23,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469514055] [2024-05-12 13:10:23,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:23,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:10:23,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:23,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:10:23,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:10:23,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:10:23,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 105 transitions, 656 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) [2024-05-12 13:10:23,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:23,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:10:23,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:24,672 INFO L124 PetriNetUnfolderBase]: 4579/7360 cut-off events. [2024-05-12 13:10:24,672 INFO L125 PetriNetUnfolderBase]: For 38576/38576 co-relation queries the response was YES. [2024-05-12 13:10:24,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26643 conditions, 7360 events. 4579/7360 cut-off events. For 38576/38576 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 45979 event pairs, 1281 based on Foata normal form. 4/7132 useless extension candidates. Maximal degree in co-relation 26607. Up to 5987 conditions per place. [2024-05-12 13:10:24,720 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 108 selfloop transitions, 50 changer transitions 0/168 dead transitions. [2024-05-12 13:10:24,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 168 transitions, 1262 flow [2024-05-12 13:10:24,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:10:24,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:10:24,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-05-12 13:10:24,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425 [2024-05-12 13:10:24,721 INFO L175 Difference]: Start difference. First operand has 91 places, 105 transitions, 656 flow. Second operand 8 states and 217 transitions. [2024-05-12 13:10:24,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 168 transitions, 1262 flow [2024-05-12 13:10:24,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 168 transitions, 1237 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-05-12 13:10:24,757 INFO L231 Difference]: Finished difference. Result has 97 places, 111 transitions, 809 flow [2024-05-12 13:10:24,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=809, PETRI_PLACES=97, PETRI_TRANSITIONS=111} [2024-05-12 13:10:24,758 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 41 predicate places. [2024-05-12 13:10:24,758 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 111 transitions, 809 flow [2024-05-12 13:10:24,758 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) [2024-05-12 13:10:24,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:24,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:24,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-05-12 13:10:24,759 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:24,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:24,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1897445915, now seen corresponding path program 2 times [2024-05-12 13:10:24,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:24,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046170126] [2024-05-12 13:10:24,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:24,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:24,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:25,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:25,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:25,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046170126] [2024-05-12 13:10:25,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046170126] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:25,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:25,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:10:25,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183065410] [2024-05-12 13:10:25,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:25,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:10:25,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:25,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:10:25,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:10:25,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:10:25,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 111 transitions, 809 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) [2024-05-12 13:10:25,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:25,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:10:25,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:27,265 INFO L124 PetriNetUnfolderBase]: 4625/7404 cut-off events. [2024-05-12 13:10:27,266 INFO L125 PetriNetUnfolderBase]: For 45551/45551 co-relation queries the response was YES. [2024-05-12 13:10:27,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28375 conditions, 7404 events. 4625/7404 cut-off events. For 45551/45551 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 46016 event pairs, 1279 based on Foata normal form. 4/7183 useless extension candidates. Maximal degree in co-relation 28337. Up to 6026 conditions per place. [2024-05-12 13:10:27,310 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 107 selfloop transitions, 51 changer transitions 0/168 dead transitions. [2024-05-12 13:10:27,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 168 transitions, 1383 flow [2024-05-12 13:10:27,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:10:27,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:10:27,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-05-12 13:10:27,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-05-12 13:10:27,312 INFO L175 Difference]: Start difference. First operand has 97 places, 111 transitions, 809 flow. Second operand 8 states and 215 transitions. [2024-05-12 13:10:27,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 168 transitions, 1383 flow [2024-05-12 13:10:27,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 168 transitions, 1286 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-05-12 13:10:27,352 INFO L231 Difference]: Finished difference. Result has 101 places, 114 transitions, 860 flow [2024-05-12 13:10:27,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=860, PETRI_PLACES=101, PETRI_TRANSITIONS=114} [2024-05-12 13:10:27,353 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 45 predicate places. [2024-05-12 13:10:27,353 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 114 transitions, 860 flow [2024-05-12 13:10:27,354 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) [2024-05-12 13:10:27,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:27,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:27,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-05-12 13:10:27,354 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:27,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:27,355 INFO L85 PathProgramCache]: Analyzing trace with hash 593966961, now seen corresponding path program 3 times [2024-05-12 13:10:27,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:27,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893297185] [2024-05-12 13:10:27,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:27,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:27,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:28,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:28,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:28,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893297185] [2024-05-12 13:10:28,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893297185] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:28,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:28,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:10:28,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493029919] [2024-05-12 13:10:28,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:28,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:10:28,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:28,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:10:28,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:10:28,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:10:28,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 114 transitions, 860 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) [2024-05-12 13:10:28,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:28,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:10:28,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:29,802 INFO L124 PetriNetUnfolderBase]: 4671/7479 cut-off events. [2024-05-12 13:10:29,802 INFO L125 PetriNetUnfolderBase]: For 48970/48970 co-relation queries the response was YES. [2024-05-12 13:10:29,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28923 conditions, 7479 events. 4671/7479 cut-off events. For 48970/48970 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 46465 event pairs, 1284 based on Foata normal form. 4/7256 useless extension candidates. Maximal degree in co-relation 28883. Up to 6065 conditions per place. [2024-05-12 13:10:29,840 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 109 selfloop transitions, 52 changer transitions 0/171 dead transitions. [2024-05-12 13:10:29,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 171 transitions, 1448 flow [2024-05-12 13:10:29,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:10:29,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:10:29,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-05-12 13:10:29,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5325 [2024-05-12 13:10:29,842 INFO L175 Difference]: Start difference. First operand has 101 places, 114 transitions, 860 flow. Second operand 8 states and 213 transitions. [2024-05-12 13:10:29,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 171 transitions, 1448 flow [2024-05-12 13:10:29,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 171 transitions, 1348 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-05-12 13:10:29,880 INFO L231 Difference]: Finished difference. Result has 104 places, 117 transitions, 908 flow [2024-05-12 13:10:29,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=763, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=908, PETRI_PLACES=104, PETRI_TRANSITIONS=117} [2024-05-12 13:10:29,881 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 48 predicate places. [2024-05-12 13:10:29,881 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 117 transitions, 908 flow [2024-05-12 13:10:29,881 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) [2024-05-12 13:10:29,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:29,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:29,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-05-12 13:10:29,882 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:29,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:29,882 INFO L85 PathProgramCache]: Analyzing trace with hash 701805971, now seen corresponding path program 4 times [2024-05-12 13:10:29,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:29,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763522354] [2024-05-12 13:10:29,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:29,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:29,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:30,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:30,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:30,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763522354] [2024-05-12 13:10:30,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763522354] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:30,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:30,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:10:30,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304959880] [2024-05-12 13:10:30,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:30,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:10:30,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:30,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:10:30,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:10:31,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:10:31,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 117 transitions, 908 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) [2024-05-12 13:10:31,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:31,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:10:31,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:32,291 INFO L124 PetriNetUnfolderBase]: 4661/6938 cut-off events. [2024-05-12 13:10:32,291 INFO L125 PetriNetUnfolderBase]: For 52120/52127 co-relation queries the response was YES. [2024-05-12 13:10:32,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28532 conditions, 6938 events. 4661/6938 cut-off events. For 52120/52127 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 39445 event pairs, 1141 based on Foata normal form. 7/6898 useless extension candidates. Maximal degree in co-relation 28491. Up to 6057 conditions per place. [2024-05-12 13:10:32,336 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 106 selfloop transitions, 51 changer transitions 0/167 dead transitions. [2024-05-12 13:10:32,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 167 transitions, 1388 flow [2024-05-12 13:10:32,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:10:32,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:10:32,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-05-12 13:10:32,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175 [2024-05-12 13:10:32,338 INFO L175 Difference]: Start difference. First operand has 104 places, 117 transitions, 908 flow. Second operand 8 states and 207 transitions. [2024-05-12 13:10:32,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 167 transitions, 1388 flow [2024-05-12 13:10:32,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 167 transitions, 1278 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-05-12 13:10:32,409 INFO L231 Difference]: Finished difference. Result has 107 places, 117 transitions, 908 flow [2024-05-12 13:10:32,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=798, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=908, PETRI_PLACES=107, PETRI_TRANSITIONS=117} [2024-05-12 13:10:32,409 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 51 predicate places. [2024-05-12 13:10:32,409 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 117 transitions, 908 flow [2024-05-12 13:10:32,410 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) [2024-05-12 13:10:32,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:32,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:32,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-05-12 13:10:32,410 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:32,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:32,411 INFO L85 PathProgramCache]: Analyzing trace with hash 992433115, now seen corresponding path program 1 times [2024-05-12 13:10:32,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:32,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965448200] [2024-05-12 13:10:32,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:32,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:32,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:33,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:33,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:33,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965448200] [2024-05-12 13:10:33,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965448200] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:33,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:33,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:10:33,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686963082] [2024-05-12 13:10:33,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:33,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:10:33,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:33,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:10:33,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:10:33,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-05-12 13:10:33,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 117 transitions, 908 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:33,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:33,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-05-12 13:10:33,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:34,509 INFO L124 PetriNetUnfolderBase]: 3600/5988 cut-off events. [2024-05-12 13:10:34,510 INFO L125 PetriNetUnfolderBase]: For 46829/46833 co-relation queries the response was YES. [2024-05-12 13:10:34,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23864 conditions, 5988 events. 3600/5988 cut-off events. For 46829/46833 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 38940 event pairs, 1403 based on Foata normal form. 6/5892 useless extension candidates. Maximal degree in co-relation 23822. Up to 5132 conditions per place. [2024-05-12 13:10:34,625 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 106 selfloop transitions, 12 changer transitions 0/140 dead transitions. [2024-05-12 13:10:34,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 140 transitions, 1228 flow [2024-05-12 13:10:34,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:10:34,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:10:34,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-05-12 13:10:34,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5233333333333333 [2024-05-12 13:10:34,626 INFO L175 Difference]: Start difference. First operand has 107 places, 117 transitions, 908 flow. Second operand 6 states and 157 transitions. [2024-05-12 13:10:34,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 140 transitions, 1228 flow [2024-05-12 13:10:34,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 140 transitions, 1062 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-05-12 13:10:34,661 INFO L231 Difference]: Finished difference. Result has 103 places, 120 transitions, 804 flow [2024-05-12 13:10:34,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=804, PETRI_PLACES=103, PETRI_TRANSITIONS=120} [2024-05-12 13:10:34,662 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 47 predicate places. [2024-05-12 13:10:34,662 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 120 transitions, 804 flow [2024-05-12 13:10:34,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:34,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:34,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:34,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-05-12 13:10:34,663 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:34,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:34,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1086182661, now seen corresponding path program 1 times [2024-05-12 13:10:34,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:34,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370905790] [2024-05-12 13:10:34,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:34,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:34,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:35,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:35,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:35,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370905790] [2024-05-12 13:10:35,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370905790] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:35,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:35,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:10:35,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955504568] [2024-05-12 13:10:35,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:35,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:10:35,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:35,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:10:35,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:10:35,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:10:35,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 120 transitions, 804 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:35,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:35,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:10:35,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:37,286 INFO L124 PetriNetUnfolderBase]: 4713/7661 cut-off events. [2024-05-12 13:10:37,286 INFO L125 PetriNetUnfolderBase]: For 59683/59683 co-relation queries the response was YES. [2024-05-12 13:10:37,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29937 conditions, 7661 events. 4713/7661 cut-off events. For 59683/59683 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 48693 event pairs, 1437 based on Foata normal form. 4/7411 useless extension candidates. Maximal degree in co-relation 29895. Up to 6585 conditions per place. [2024-05-12 13:10:37,332 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 151 selfloop transitions, 26 changer transitions 0/187 dead transitions. [2024-05-12 13:10:37,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 187 transitions, 1396 flow [2024-05-12 13:10:37,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:10:37,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:10:37,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-05-12 13:10:37,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-05-12 13:10:37,335 INFO L175 Difference]: Start difference. First operand has 103 places, 120 transitions, 804 flow. Second operand 9 states and 234 transitions. [2024-05-12 13:10:37,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 187 transitions, 1396 flow [2024-05-12 13:10:37,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 187 transitions, 1356 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-05-12 13:10:37,384 INFO L231 Difference]: Finished difference. Result has 108 places, 123 transitions, 866 flow [2024-05-12 13:10:37,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=866, PETRI_PLACES=108, PETRI_TRANSITIONS=123} [2024-05-12 13:10:37,385 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 52 predicate places. [2024-05-12 13:10:37,385 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 123 transitions, 866 flow [2024-05-12 13:10:37,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:37,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:37,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:37,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-05-12 13:10:37,386 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:37,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:37,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1086302631, now seen corresponding path program 2 times [2024-05-12 13:10:37,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:37,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405080873] [2024-05-12 13:10:37,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:37,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:37,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:38,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:38,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:38,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405080873] [2024-05-12 13:10:38,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405080873] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:38,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:38,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:10:38,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577277404] [2024-05-12 13:10:38,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:38,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:10:38,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:38,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:10:38,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:10:38,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:10:38,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 123 transitions, 866 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:38,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:38,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:10:38,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:40,055 INFO L124 PetriNetUnfolderBase]: 4759/7630 cut-off events. [2024-05-12 13:10:40,055 INFO L125 PetriNetUnfolderBase]: For 66556/66556 co-relation queries the response was YES. [2024-05-12 13:10:40,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31134 conditions, 7630 events. 4759/7630 cut-off events. For 66556/66556 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 47565 event pairs, 1181 based on Foata normal form. 4/7405 useless extension candidates. Maximal degree in co-relation 31091. Up to 6009 conditions per place. [2024-05-12 13:10:40,108 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 121 selfloop transitions, 64 changer transitions 0/195 dead transitions. [2024-05-12 13:10:40,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 195 transitions, 1596 flow [2024-05-12 13:10:40,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:10:40,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:10:40,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-05-12 13:10:40,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5422222222222223 [2024-05-12 13:10:40,109 INFO L175 Difference]: Start difference. First operand has 108 places, 123 transitions, 866 flow. Second operand 9 states and 244 transitions. [2024-05-12 13:10:40,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 195 transitions, 1596 flow [2024-05-12 13:10:40,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 195 transitions, 1518 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-05-12 13:10:40,165 INFO L231 Difference]: Finished difference. Result has 110 places, 129 transitions, 1014 flow [2024-05-12 13:10:40,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1014, PETRI_PLACES=110, PETRI_TRANSITIONS=129} [2024-05-12 13:10:40,165 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 54 predicate places. [2024-05-12 13:10:40,165 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 129 transitions, 1014 flow [2024-05-12 13:10:40,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:40,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:40,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:40,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-05-12 13:10:40,166 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:40,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:40,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1090944261, now seen corresponding path program 3 times [2024-05-12 13:10:40,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:40,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117383952] [2024-05-12 13:10:40,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:40,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:40,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:41,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:41,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:41,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117383952] [2024-05-12 13:10:41,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117383952] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:41,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:41,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:10:41,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207091667] [2024-05-12 13:10:41,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:41,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:10:41,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:41,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:10:41,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:10:41,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:10:41,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 129 transitions, 1014 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:41,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:41,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:10:41,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:42,801 INFO L124 PetriNetUnfolderBase]: 4805/7728 cut-off events. [2024-05-12 13:10:42,801 INFO L125 PetriNetUnfolderBase]: For 76060/76060 co-relation queries the response was YES. [2024-05-12 13:10:42,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32823 conditions, 7728 events. 4805/7728 cut-off events. For 76060/76060 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 48423 event pairs, 1196 based on Foata normal form. 4/7497 useless extension candidates. Maximal degree in co-relation 32779. Up to 6048 conditions per place. [2024-05-12 13:10:42,853 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 120 selfloop transitions, 65 changer transitions 0/195 dead transitions. [2024-05-12 13:10:42,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 195 transitions, 1702 flow [2024-05-12 13:10:42,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:10:42,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:10:42,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-05-12 13:10:42,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5377777777777778 [2024-05-12 13:10:42,855 INFO L175 Difference]: Start difference. First operand has 110 places, 129 transitions, 1014 flow. Second operand 9 states and 242 transitions. [2024-05-12 13:10:42,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 195 transitions, 1702 flow [2024-05-12 13:10:42,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 195 transitions, 1589 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-05-12 13:10:42,920 INFO L231 Difference]: Finished difference. Result has 114 places, 132 transitions, 1087 flow [2024-05-12 13:10:42,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1087, PETRI_PLACES=114, PETRI_TRANSITIONS=132} [2024-05-12 13:10:42,921 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 58 predicate places. [2024-05-12 13:10:42,921 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 132 transitions, 1087 flow [2024-05-12 13:10:42,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:42,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:42,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:42,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-05-12 13:10:42,921 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:42,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:42,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1263680415, now seen corresponding path program 1 times [2024-05-12 13:10:42,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:42,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262996133] [2024-05-12 13:10:42,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:42,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:42,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:44,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:44,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:44,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262996133] [2024-05-12 13:10:44,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262996133] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:44,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:44,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:10:44,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484022032] [2024-05-12 13:10:44,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:44,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:10:44,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:44,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:10:44,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:10:44,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:10:44,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 132 transitions, 1087 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:44,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:44,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:10:44,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:45,500 INFO L124 PetriNetUnfolderBase]: 4575/7497 cut-off events. [2024-05-12 13:10:45,501 INFO L125 PetriNetUnfolderBase]: For 80564/80565 co-relation queries the response was YES. [2024-05-12 13:10:45,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32460 conditions, 7497 events. 4575/7497 cut-off events. For 80564/80565 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 48201 event pairs, 1317 based on Foata normal form. 5/7254 useless extension candidates. Maximal degree in co-relation 32414. Up to 6264 conditions per place. [2024-05-12 13:10:45,552 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 136 selfloop transitions, 41 changer transitions 0/192 dead transitions. [2024-05-12 13:10:45,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 192 transitions, 1710 flow [2024-05-12 13:10:45,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:10:45,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:10:45,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-05-12 13:10:45,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5275 [2024-05-12 13:10:45,554 INFO L175 Difference]: Start difference. First operand has 114 places, 132 transitions, 1087 flow. Second operand 8 states and 211 transitions. [2024-05-12 13:10:45,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 192 transitions, 1710 flow [2024-05-12 13:10:45,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 192 transitions, 1572 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-05-12 13:10:45,611 INFO L231 Difference]: Finished difference. Result has 117 places, 141 transitions, 1158 flow [2024-05-12 13:10:45,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=958, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1158, PETRI_PLACES=117, PETRI_TRANSITIONS=141} [2024-05-12 13:10:45,612 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 61 predicate places. [2024-05-12 13:10:45,612 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 141 transitions, 1158 flow [2024-05-12 13:10:45,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:45,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:45,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:45,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-05-12 13:10:45,612 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:45,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:45,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1233107205, now seen corresponding path program 4 times [2024-05-12 13:10:45,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:45,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951249397] [2024-05-12 13:10:45,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:45,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:45,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:46,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:46,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:46,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951249397] [2024-05-12 13:10:46,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951249397] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:46,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:46,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:10:46,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847353070] [2024-05-12 13:10:46,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:46,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:10:46,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:46,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:10:46,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:10:46,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:10:46,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 141 transitions, 1158 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:46,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:46,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:10:46,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:48,494 INFO L124 PetriNetUnfolderBase]: 4888/7861 cut-off events. [2024-05-12 13:10:48,495 INFO L125 PetriNetUnfolderBase]: For 88373/88373 co-relation queries the response was YES. [2024-05-12 13:10:48,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34746 conditions, 7861 events. 4888/7861 cut-off events. For 88373/88373 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 49332 event pairs, 1207 based on Foata normal form. 4/7636 useless extension candidates. Maximal degree in co-relation 34698. Up to 6142 conditions per place. [2024-05-12 13:10:48,551 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 125 selfloop transitions, 72 changer transitions 0/207 dead transitions. [2024-05-12 13:10:48,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 207 transitions, 1889 flow [2024-05-12 13:10:48,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:10:48,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:10:48,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-05-12 13:10:48,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-05-12 13:10:48,553 INFO L175 Difference]: Start difference. First operand has 117 places, 141 transitions, 1158 flow. Second operand 9 states and 240 transitions. [2024-05-12 13:10:48,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 207 transitions, 1889 flow [2024-05-12 13:10:48,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 207 transitions, 1784 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-05-12 13:10:48,652 INFO L231 Difference]: Finished difference. Result has 121 places, 144 transitions, 1248 flow [2024-05-12 13:10:48,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1053, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1248, PETRI_PLACES=121, PETRI_TRANSITIONS=144} [2024-05-12 13:10:48,652 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 65 predicate places. [2024-05-12 13:10:48,652 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 144 transitions, 1248 flow [2024-05-12 13:10:48,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:48,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:48,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:48,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-05-12 13:10:48,653 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:48,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:48,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1632242401, now seen corresponding path program 1 times [2024-05-12 13:10:48,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:48,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848956344] [2024-05-12 13:10:48,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:48,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:48,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:49,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:49,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:49,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848956344] [2024-05-12 13:10:49,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848956344] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:49,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:49,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:10:49,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060184753] [2024-05-12 13:10:49,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:49,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:10:49,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:49,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:10:49,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:10:49,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:10:49,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 144 transitions, 1248 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:49,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:49,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:10:49,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:50,519 INFO L124 PetriNetUnfolderBase]: 4326/6927 cut-off events. [2024-05-12 13:10:50,519 INFO L125 PetriNetUnfolderBase]: For 93890/93910 co-relation queries the response was YES. [2024-05-12 13:10:50,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32542 conditions, 6927 events. 4326/6927 cut-off events. For 93890/93910 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 44203 event pairs, 1574 based on Foata normal form. 5/6762 useless extension candidates. Maximal degree in co-relation 32493. Up to 6152 conditions per place. [2024-05-12 13:10:50,572 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 141 selfloop transitions, 16 changer transitions 0/178 dead transitions. [2024-05-12 13:10:50,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 178 transitions, 1739 flow [2024-05-12 13:10:50,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:10:50,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:10:50,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-05-12 13:10:50,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-05-12 13:10:50,575 INFO L175 Difference]: Start difference. First operand has 121 places, 144 transitions, 1248 flow. Second operand 6 states and 156 transitions. [2024-05-12 13:10:50,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 178 transitions, 1739 flow [2024-05-12 13:10:50,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 178 transitions, 1593 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-05-12 13:10:50,651 INFO L231 Difference]: Finished difference. Result has 122 places, 154 transitions, 1268 flow [2024-05-12 13:10:50,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1106, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1268, PETRI_PLACES=122, PETRI_TRANSITIONS=154} [2024-05-12 13:10:50,651 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 66 predicate places. [2024-05-12 13:10:50,651 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 154 transitions, 1268 flow [2024-05-12 13:10:50,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:50,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:50,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:50,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-05-12 13:10:50,652 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:50,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:50,652 INFO L85 PathProgramCache]: Analyzing trace with hash -418395393, now seen corresponding path program 2 times [2024-05-12 13:10:50,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:50,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411236586] [2024-05-12 13:10:50,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:50,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:50,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:51,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:51,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:51,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411236586] [2024-05-12 13:10:51,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411236586] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:51,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:51,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:10:51,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724012393] [2024-05-12 13:10:51,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:51,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:10:51,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:51,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:10:51,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:10:52,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:10:52,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 154 transitions, 1268 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:52,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:52,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:10:52,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:53,258 INFO L124 PetriNetUnfolderBase]: 4715/7497 cut-off events. [2024-05-12 13:10:53,258 INFO L125 PetriNetUnfolderBase]: For 102411/102427 co-relation queries the response was YES. [2024-05-12 13:10:53,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35193 conditions, 7497 events. 4715/7497 cut-off events. For 102411/102427 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 47402 event pairs, 1545 based on Foata normal form. 18/7362 useless extension candidates. Maximal degree in co-relation 35142. Up to 6459 conditions per place. [2024-05-12 13:10:53,322 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 142 selfloop transitions, 58 changer transitions 0/215 dead transitions. [2024-05-12 13:10:53,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 215 transitions, 1986 flow [2024-05-12 13:10:53,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:10:53,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:10:53,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-05-12 13:10:53,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175 [2024-05-12 13:10:53,324 INFO L175 Difference]: Start difference. First operand has 122 places, 154 transitions, 1268 flow. Second operand 8 states and 207 transitions. [2024-05-12 13:10:53,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 215 transitions, 1986 flow [2024-05-12 13:10:53,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 215 transitions, 1943 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-05-12 13:10:53,409 INFO L231 Difference]: Finished difference. Result has 128 places, 167 transitions, 1525 flow [2024-05-12 13:10:53,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1225, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1525, PETRI_PLACES=128, PETRI_TRANSITIONS=167} [2024-05-12 13:10:53,409 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 72 predicate places. [2024-05-12 13:10:53,409 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 167 transitions, 1525 flow [2024-05-12 13:10:53,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:53,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:53,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:53,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-05-12 13:10:53,410 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:53,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:53,410 INFO L85 PathProgramCache]: Analyzing trace with hash -130863573, now seen corresponding path program 3 times [2024-05-12 13:10:53,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:53,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761500766] [2024-05-12 13:10:53,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:53,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:53,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:54,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:54,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:54,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761500766] [2024-05-12 13:10:54,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761500766] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:54,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:54,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:10:54,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420096654] [2024-05-12 13:10:54,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:54,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:10:54,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:54,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:10:54,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:10:54,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:10:54,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 167 transitions, 1525 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:54,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:54,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:10:54,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:56,045 INFO L124 PetriNetUnfolderBase]: 4752/7534 cut-off events. [2024-05-12 13:10:56,045 INFO L125 PetriNetUnfolderBase]: For 112894/112908 co-relation queries the response was YES. [2024-05-12 13:10:56,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36971 conditions, 7534 events. 4752/7534 cut-off events. For 112894/112908 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 47458 event pairs, 1444 based on Foata normal form. 16/7392 useless extension candidates. Maximal degree in co-relation 36918. Up to 6340 conditions per place. [2024-05-12 13:10:56,105 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 141 selfloop transitions, 65 changer transitions 0/221 dead transitions. [2024-05-12 13:10:56,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 221 transitions, 2281 flow [2024-05-12 13:10:56,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:10:56,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:10:56,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-05-12 13:10:56,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-05-12 13:10:56,106 INFO L175 Difference]: Start difference. First operand has 128 places, 167 transitions, 1525 flow. Second operand 8 states and 210 transitions. [2024-05-12 13:10:56,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 221 transitions, 2281 flow [2024-05-12 13:10:56,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 221 transitions, 2179 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-05-12 13:10:56,223 INFO L231 Difference]: Finished difference. Result has 133 places, 171 transitions, 1648 flow [2024-05-12 13:10:56,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1423, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1648, PETRI_PLACES=133, PETRI_TRANSITIONS=171} [2024-05-12 13:10:56,224 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 77 predicate places. [2024-05-12 13:10:56,224 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 171 transitions, 1648 flow [2024-05-12 13:10:56,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:56,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:56,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:56,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-05-12 13:10:56,225 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:56,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:56,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1030058237, now seen corresponding path program 4 times [2024-05-12 13:10:56,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:56,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861804273] [2024-05-12 13:10:56,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:56,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:56,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:57,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:57,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:57,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861804273] [2024-05-12 13:10:57,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861804273] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:57,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:57,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:10:57,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068588126] [2024-05-12 13:10:57,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:57,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:10:57,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:57,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:10:57,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:10:57,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:10:57,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 171 transitions, 1648 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:57,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:57,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:10:57,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:58,821 INFO L124 PetriNetUnfolderBase]: 4744/7547 cut-off events. [2024-05-12 13:10:58,821 INFO L125 PetriNetUnfolderBase]: For 119292/119308 co-relation queries the response was YES. [2024-05-12 13:10:58,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36562 conditions, 7547 events. 4744/7547 cut-off events. For 119292/119308 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 47742 event pairs, 1567 based on Foata normal form. 18/7394 useless extension candidates. Maximal degree in co-relation 36508. Up to 6502 conditions per place. [2024-05-12 13:10:58,878 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 146 selfloop transitions, 57 changer transitions 0/218 dead transitions. [2024-05-12 13:10:58,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 218 transitions, 2218 flow [2024-05-12 13:10:58,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:10:58,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:10:58,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-05-12 13:10:58,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-05-12 13:10:58,880 INFO L175 Difference]: Start difference. First operand has 133 places, 171 transitions, 1648 flow. Second operand 8 states and 208 transitions. [2024-05-12 13:10:58,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 218 transitions, 2218 flow [2024-05-12 13:10:59,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 218 transitions, 2087 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-05-12 13:10:59,006 INFO L231 Difference]: Finished difference. Result has 137 places, 171 transitions, 1639 flow [2024-05-12 13:10:59,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1517, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1639, PETRI_PLACES=137, PETRI_TRANSITIONS=171} [2024-05-12 13:10:59,007 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 81 predicate places. [2024-05-12 13:10:59,007 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 171 transitions, 1639 flow [2024-05-12 13:10:59,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:59,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:59,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:59,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-05-12 13:10:59,008 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:59,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:59,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1030304501, now seen corresponding path program 5 times [2024-05-12 13:10:59,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:59,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978679033] [2024-05-12 13:10:59,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:59,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:59,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:00,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:00,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:00,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978679033] [2024-05-12 13:11:00,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978679033] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:00,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:00,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:11:00,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391221674] [2024-05-12 13:11:00,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:00,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:11:00,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:00,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:11:00,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:11:00,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:11:00,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 171 transitions, 1639 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:00,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:00,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:11:00,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:01,562 INFO L124 PetriNetUnfolderBase]: 5003/7928 cut-off events. [2024-05-12 13:11:01,562 INFO L125 PetriNetUnfolderBase]: For 121435/121439 co-relation queries the response was YES. [2024-05-12 13:11:01,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37867 conditions, 7928 events. 5003/7928 cut-off events. For 121435/121439 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 49491 event pairs, 1376 based on Foata normal form. 5/7748 useless extension candidates. Maximal degree in co-relation 37811. Up to 6283 conditions per place. [2024-05-12 13:11:01,619 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 137 selfloop transitions, 82 changer transitions 0/229 dead transitions. [2024-05-12 13:11:01,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 229 transitions, 2279 flow [2024-05-12 13:11:01,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:11:01,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:11:01,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-05-12 13:11:01,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-05-12 13:11:01,620 INFO L175 Difference]: Start difference. First operand has 137 places, 171 transitions, 1639 flow. Second operand 9 states and 234 transitions. [2024-05-12 13:11:01,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 229 transitions, 2279 flow [2024-05-12 13:11:01,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 229 transitions, 2084 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-05-12 13:11:01,734 INFO L231 Difference]: Finished difference. Result has 137 places, 171 transitions, 1616 flow [2024-05-12 13:11:01,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1444, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1616, PETRI_PLACES=137, PETRI_TRANSITIONS=171} [2024-05-12 13:11:01,734 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 81 predicate places. [2024-05-12 13:11:01,735 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 171 transitions, 1616 flow [2024-05-12 13:11:01,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:01,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:01,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:01,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-05-12 13:11:01,735 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:01,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:01,736 INFO L85 PathProgramCache]: Analyzing trace with hash 700639991, now seen corresponding path program 2 times [2024-05-12 13:11:01,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:01,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122972320] [2024-05-12 13:11:01,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:01,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:01,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:02,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:02,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:02,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122972320] [2024-05-12 13:11:02,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122972320] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:02,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:02,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:11:02,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903636112] [2024-05-12 13:11:02,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:02,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:11:02,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:02,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:11:02,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:11:02,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:11:02,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 171 transitions, 1616 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:02,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:02,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:11:02,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:03,556 INFO L124 PetriNetUnfolderBase]: 4426/7093 cut-off events. [2024-05-12 13:11:03,556 INFO L125 PetriNetUnfolderBase]: For 125682/125722 co-relation queries the response was YES. [2024-05-12 13:11:03,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35384 conditions, 7093 events. 4426/7093 cut-off events. For 125682/125722 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 45301 event pairs, 1602 based on Foata normal form. 15/6921 useless extension candidates. Maximal degree in co-relation 35329. Up to 6277 conditions per place. [2024-05-12 13:11:03,615 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 153 selfloop transitions, 21 changer transitions 0/195 dead transitions. [2024-05-12 13:11:03,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 195 transitions, 2074 flow [2024-05-12 13:11:03,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:11:03,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:11:03,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-05-12 13:11:03,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-05-12 13:11:03,617 INFO L175 Difference]: Start difference. First operand has 137 places, 171 transitions, 1616 flow. Second operand 6 states and 153 transitions. [2024-05-12 13:11:03,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 195 transitions, 2074 flow [2024-05-12 13:11:03,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 195 transitions, 1809 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-05-12 13:11:03,723 INFO L231 Difference]: Finished difference. Result has 133 places, 174 transitions, 1443 flow [2024-05-12 13:11:03,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1351, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1443, PETRI_PLACES=133, PETRI_TRANSITIONS=174} [2024-05-12 13:11:03,724 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 77 predicate places. [2024-05-12 13:11:03,724 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 174 transitions, 1443 flow [2024-05-12 13:11:03,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:03,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:03,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:03,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-05-12 13:11:03,725 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:03,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:03,725 INFO L85 PathProgramCache]: Analyzing trace with hash 2030281017, now seen corresponding path program 1 times [2024-05-12 13:11:03,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:03,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234890650] [2024-05-12 13:11:03,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:03,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:03,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:04,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:04,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:04,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234890650] [2024-05-12 13:11:04,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234890650] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:04,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:04,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:11:04,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589406023] [2024-05-12 13:11:04,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:04,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:11:04,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:04,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:11:04,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:11:04,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:11:04,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 174 transitions, 1443 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:04,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:04,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:11:04,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:05,691 INFO L124 PetriNetUnfolderBase]: 4184/6861 cut-off events. [2024-05-12 13:11:05,692 INFO L125 PetriNetUnfolderBase]: For 112778/112782 co-relation queries the response was YES. [2024-05-12 13:11:05,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33141 conditions, 6861 events. 4184/6861 cut-off events. For 112778/112782 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 44578 event pairs, 1413 based on Foata normal form. 6/6733 useless extension candidates. Maximal degree in co-relation 33085. Up to 5947 conditions per place. [2024-05-12 13:11:05,747 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 173 selfloop transitions, 13 changer transitions 0/202 dead transitions. [2024-05-12 13:11:05,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 202 transitions, 1946 flow [2024-05-12 13:11:05,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:11:05,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:11:05,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-05-12 13:11:05,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5133333333333333 [2024-05-12 13:11:05,748 INFO L175 Difference]: Start difference. First operand has 133 places, 174 transitions, 1443 flow. Second operand 6 states and 154 transitions. [2024-05-12 13:11:05,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 202 transitions, 1946 flow [2024-05-12 13:11:05,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 202 transitions, 1876 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-05-12 13:11:05,849 INFO L231 Difference]: Finished difference. Result has 136 places, 181 transitions, 1489 flow [2024-05-12 13:11:05,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1373, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1489, PETRI_PLACES=136, PETRI_TRANSITIONS=181} [2024-05-12 13:11:05,849 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 80 predicate places. [2024-05-12 13:11:05,849 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 181 transitions, 1489 flow [2024-05-12 13:11:05,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:05,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:05,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:05,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-05-12 13:11:05,850 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:05,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:05,852 INFO L85 PathProgramCache]: Analyzing trace with hash 700647927, now seen corresponding path program 2 times [2024-05-12 13:11:05,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:05,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474988579] [2024-05-12 13:11:05,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:05,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:05,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:06,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:06,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:06,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474988579] [2024-05-12 13:11:06,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474988579] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:06,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:06,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:11:06,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445386580] [2024-05-12 13:11:06,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:06,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:11:06,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:06,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:11:06,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:11:06,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:11:06,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 181 transitions, 1489 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:06,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:06,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:11:06,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:07,871 INFO L124 PetriNetUnfolderBase]: 4203/6955 cut-off events. [2024-05-12 13:11:07,871 INFO L125 PetriNetUnfolderBase]: For 120584/120594 co-relation queries the response was YES. [2024-05-12 13:11:07,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34383 conditions, 6955 events. 4203/6955 cut-off events. For 120584/120594 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 45837 event pairs, 1400 based on Foata normal form. 10/6823 useless extension candidates. Maximal degree in co-relation 34325. Up to 5942 conditions per place. [2024-05-12 13:11:07,926 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 171 selfloop transitions, 18 changer transitions 0/205 dead transitions. [2024-05-12 13:11:07,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 205 transitions, 1979 flow [2024-05-12 13:11:07,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:11:07,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:11:07,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-05-12 13:11:07,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-05-12 13:11:07,927 INFO L175 Difference]: Start difference. First operand has 136 places, 181 transitions, 1489 flow. Second operand 6 states and 155 transitions. [2024-05-12 13:11:07,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 205 transitions, 1979 flow [2024-05-12 13:11:08,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 205 transitions, 1930 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-05-12 13:11:08,047 INFO L231 Difference]: Finished difference. Result has 139 places, 184 transitions, 1528 flow [2024-05-12 13:11:08,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1440, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1528, PETRI_PLACES=139, PETRI_TRANSITIONS=184} [2024-05-12 13:11:08,047 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 83 predicate places. [2024-05-12 13:11:08,048 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 184 transitions, 1528 flow [2024-05-12 13:11:08,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:08,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:08,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:08,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-05-12 13:11:08,048 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:08,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:08,049 INFO L85 PathProgramCache]: Analyzing trace with hash -540250167, now seen corresponding path program 1 times [2024-05-12 13:11:08,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:08,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153290033] [2024-05-12 13:11:08,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:08,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:08,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:09,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:09,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:09,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153290033] [2024-05-12 13:11:09,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153290033] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:09,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:09,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:11:09,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591318566] [2024-05-12 13:11:09,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:09,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:11:09,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:09,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:11:09,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:11:09,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:11:09,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 184 transitions, 1528 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:09,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:09,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:11:09,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:11,103 INFO L124 PetriNetUnfolderBase]: 5095/8018 cut-off events. [2024-05-12 13:11:11,103 INFO L125 PetriNetUnfolderBase]: For 152438/152438 co-relation queries the response was YES. [2024-05-12 13:11:11,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40902 conditions, 8018 events. 5095/8018 cut-off events. For 152438/152438 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 50143 event pairs, 1568 based on Foata normal form. 4/7878 useless extension candidates. Maximal degree in co-relation 40843. Up to 6794 conditions per place. [2024-05-12 13:11:11,187 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 168 selfloop transitions, 69 changer transitions 0/247 dead transitions. [2024-05-12 13:11:11,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 247 transitions, 2258 flow [2024-05-12 13:11:11,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:11:11,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:11:11,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-05-12 13:11:11,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5177777777777778 [2024-05-12 13:11:11,192 INFO L175 Difference]: Start difference. First operand has 139 places, 184 transitions, 1528 flow. Second operand 9 states and 233 transitions. [2024-05-12 13:11:11,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 247 transitions, 2258 flow [2024-05-12 13:11:11,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 247 transitions, 2192 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-05-12 13:11:11,403 INFO L231 Difference]: Finished difference. Result has 145 places, 189 transitions, 1673 flow [2024-05-12 13:11:11,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1462, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1673, PETRI_PLACES=145, PETRI_TRANSITIONS=189} [2024-05-12 13:11:11,404 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 89 predicate places. [2024-05-12 13:11:11,404 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 189 transitions, 1673 flow [2024-05-12 13:11:11,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:11,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:11,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:11,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-05-12 13:11:11,405 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:11,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:11,406 INFO L85 PathProgramCache]: Analyzing trace with hash -169584313, now seen corresponding path program 1 times [2024-05-12 13:11:11,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:11,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021296157] [2024-05-12 13:11:11,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:11,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:11,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:12,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:12,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:12,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021296157] [2024-05-12 13:11:12,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021296157] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:12,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:12,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:11:12,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922025079] [2024-05-12 13:11:12,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:12,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:11:12,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:12,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:11:12,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:11:12,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:11:12,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 189 transitions, 1673 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:12,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:12,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:11:12,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:13,590 INFO L124 PetriNetUnfolderBase]: 4802/7633 cut-off events. [2024-05-12 13:11:13,590 INFO L125 PetriNetUnfolderBase]: For 160683/160683 co-relation queries the response was YES. [2024-05-12 13:11:13,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41061 conditions, 7633 events. 4802/7633 cut-off events. For 160683/160683 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 48442 event pairs, 1577 based on Foata normal form. 1/7476 useless extension candidates. Maximal degree in co-relation 41000. Up to 6808 conditions per place. [2024-05-12 13:11:13,645 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 193 selfloop transitions, 20 changer transitions 0/229 dead transitions. [2024-05-12 13:11:13,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 229 transitions, 2284 flow [2024-05-12 13:11:13,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:11:13,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:11:13,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-05-12 13:11:13,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5085714285714286 [2024-05-12 13:11:13,646 INFO L175 Difference]: Start difference. First operand has 145 places, 189 transitions, 1673 flow. Second operand 7 states and 178 transitions. [2024-05-12 13:11:13,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 229 transitions, 2284 flow [2024-05-12 13:11:13,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 229 transitions, 2109 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-05-12 13:11:13,746 INFO L231 Difference]: Finished difference. Result has 147 places, 196 transitions, 1639 flow [2024-05-12 13:11:13,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1504, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1639, PETRI_PLACES=147, PETRI_TRANSITIONS=196} [2024-05-12 13:11:13,746 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 91 predicate places. [2024-05-12 13:11:13,746 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 196 transitions, 1639 flow [2024-05-12 13:11:13,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:13,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:13,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:13,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-05-12 13:11:13,747 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:13,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:13,747 INFO L85 PathProgramCache]: Analyzing trace with hash 519118967, now seen corresponding path program 2 times [2024-05-12 13:11:13,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:13,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248299769] [2024-05-12 13:11:13,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:13,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:13,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:15,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:15,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:15,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248299769] [2024-05-12 13:11:15,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248299769] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:15,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:15,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:11:15,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089353979] [2024-05-12 13:11:15,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:15,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:11:15,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:15,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:11:15,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:11:15,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:11:15,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 196 transitions, 1639 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:15,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:15,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:11:15,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:16,649 INFO L124 PetriNetUnfolderBase]: 5345/8401 cut-off events. [2024-05-12 13:11:16,650 INFO L125 PetriNetUnfolderBase]: For 174101/174107 co-relation queries the response was YES. [2024-05-12 13:11:16,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44925 conditions, 8401 events. 5345/8401 cut-off events. For 174101/174107 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 52691 event pairs, 1606 based on Foata normal form. 8/8256 useless extension candidates. Maximal degree in co-relation 44862. Up to 7015 conditions per place. [2024-05-12 13:11:16,726 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 195 selfloop transitions, 90 changer transitions 0/295 dead transitions. [2024-05-12 13:11:16,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 295 transitions, 2849 flow [2024-05-12 13:11:16,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:11:16,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:11:16,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2024-05-12 13:11:16,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.494 [2024-05-12 13:11:16,727 INFO L175 Difference]: Start difference. First operand has 147 places, 196 transitions, 1639 flow. Second operand 10 states and 247 transitions. [2024-05-12 13:11:16,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 295 transitions, 2849 flow [2024-05-12 13:11:16,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 295 transitions, 2759 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-05-12 13:11:16,902 INFO L231 Difference]: Finished difference. Result has 158 places, 231 transitions, 2213 flow [2024-05-12 13:11:16,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1569, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2213, PETRI_PLACES=158, PETRI_TRANSITIONS=231} [2024-05-12 13:11:16,903 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 102 predicate places. [2024-05-12 13:11:16,903 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 231 transitions, 2213 flow [2024-05-12 13:11:16,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:16,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:16,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:16,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-05-12 13:11:16,904 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:16,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:16,904 INFO L85 PathProgramCache]: Analyzing trace with hash 571691737, now seen corresponding path program 3 times [2024-05-12 13:11:16,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:16,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404706514] [2024-05-12 13:11:16,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:16,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:16,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:18,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:18,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:18,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404706514] [2024-05-12 13:11:18,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404706514] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:18,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:18,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:11:18,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398541694] [2024-05-12 13:11:18,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:18,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:11:18,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:18,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:11:18,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:11:18,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:11:18,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 231 transitions, 2213 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:18,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:18,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:11:18,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:19,817 INFO L124 PetriNetUnfolderBase]: 5683/9244 cut-off events. [2024-05-12 13:11:19,817 INFO L125 PetriNetUnfolderBase]: For 196589/196593 co-relation queries the response was YES. [2024-05-12 13:11:19,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50488 conditions, 9244 events. 5683/9244 cut-off events. For 196589/196593 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 60861 event pairs, 2144 based on Foata normal form. 8/9023 useless extension candidates. Maximal degree in co-relation 50419. Up to 7331 conditions per place. [2024-05-12 13:11:19,901 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 201 selfloop transitions, 139 changer transitions 0/350 dead transitions. [2024-05-12 13:11:19,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 350 transitions, 3743 flow [2024-05-12 13:11:19,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:11:19,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:11:19,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 259 transitions. [2024-05-12 13:11:19,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.518 [2024-05-12 13:11:19,903 INFO L175 Difference]: Start difference. First operand has 158 places, 231 transitions, 2213 flow. Second operand 10 states and 259 transitions. [2024-05-12 13:11:19,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 350 transitions, 3743 flow [2024-05-12 13:11:20,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 350 transitions, 3554 flow, removed 40 selfloop flow, removed 2 redundant places. [2024-05-12 13:11:20,154 INFO L231 Difference]: Finished difference. Result has 169 places, 282 transitions, 3026 flow [2024-05-12 13:11:20,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2102, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3026, PETRI_PLACES=169, PETRI_TRANSITIONS=282} [2024-05-12 13:11:20,155 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 113 predicate places. [2024-05-12 13:11:20,156 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 282 transitions, 3026 flow [2024-05-12 13:11:20,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:20,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:20,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:20,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-05-12 13:11:20,156 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:20,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:20,156 INFO L85 PathProgramCache]: Analyzing trace with hash 999203401, now seen corresponding path program 4 times [2024-05-12 13:11:20,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:20,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747022435] [2024-05-12 13:11:20,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:20,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:20,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:21,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:21,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747022435] [2024-05-12 13:11:21,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747022435] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:21,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:21,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:11:21,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111873484] [2024-05-12 13:11:21,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:21,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:11:21,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:21,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:11:21,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:11:21,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:11:21,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 282 transitions, 3026 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:21,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:21,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:11:21,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:23,258 INFO L124 PetriNetUnfolderBase]: 5839/9563 cut-off events. [2024-05-12 13:11:23,258 INFO L125 PetriNetUnfolderBase]: For 215845/215849 co-relation queries the response was YES. [2024-05-12 13:11:23,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53818 conditions, 9563 events. 5839/9563 cut-off events. For 215845/215849 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 63852 event pairs, 2140 based on Foata normal form. 8/9323 useless extension candidates. Maximal degree in co-relation 53744. Up to 7391 conditions per place. [2024-05-12 13:11:23,328 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 206 selfloop transitions, 145 changer transitions 0/361 dead transitions. [2024-05-12 13:11:23,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 361 transitions, 4295 flow [2024-05-12 13:11:23,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:11:23,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:11:23,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 262 transitions. [2024-05-12 13:11:23,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524 [2024-05-12 13:11:23,330 INFO L175 Difference]: Start difference. First operand has 169 places, 282 transitions, 3026 flow. Second operand 10 states and 262 transitions. [2024-05-12 13:11:23,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 361 transitions, 4295 flow [2024-05-12 13:11:23,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 361 transitions, 4132 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-05-12 13:11:23,595 INFO L231 Difference]: Finished difference. Result has 177 places, 290 transitions, 3312 flow [2024-05-12 13:11:23,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2863, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3312, PETRI_PLACES=177, PETRI_TRANSITIONS=290} [2024-05-12 13:11:23,595 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 121 predicate places. [2024-05-12 13:11:23,595 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 290 transitions, 3312 flow [2024-05-12 13:11:23,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:23,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:23,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:23,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-05-12 13:11:23,596 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:23,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:23,596 INFO L85 PathProgramCache]: Analyzing trace with hash 991784791, now seen corresponding path program 5 times [2024-05-12 13:11:23,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:23,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059056284] [2024-05-12 13:11:23,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:23,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:23,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:24,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:24,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:24,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059056284] [2024-05-12 13:11:24,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059056284] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:24,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:24,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:11:24,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002732266] [2024-05-12 13:11:24,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:24,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:11:24,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:24,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:11:24,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:11:24,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:11:24,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 290 transitions, 3312 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:24,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:24,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:11:24,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:26,615 INFO L124 PetriNetUnfolderBase]: 5831/9515 cut-off events. [2024-05-12 13:11:26,615 INFO L125 PetriNetUnfolderBase]: For 226562/226566 co-relation queries the response was YES. [2024-05-12 13:11:26,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54384 conditions, 9515 events. 5831/9515 cut-off events. For 226562/226566 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 63214 event pairs, 2173 based on Foata normal form. 8/9283 useless extension candidates. Maximal degree in co-relation 54308. Up to 7570 conditions per place. [2024-05-12 13:11:26,701 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 214 selfloop transitions, 134 changer transitions 0/358 dead transitions. [2024-05-12 13:11:26,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 358 transitions, 4321 flow [2024-05-12 13:11:26,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:11:26,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:11:26,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 260 transitions. [2024-05-12 13:11:26,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-05-12 13:11:26,703 INFO L175 Difference]: Start difference. First operand has 177 places, 290 transitions, 3312 flow. Second operand 10 states and 260 transitions. [2024-05-12 13:11:26,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 358 transitions, 4321 flow [2024-05-12 13:11:27,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 358 transitions, 4081 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-05-12 13:11:27,051 INFO L231 Difference]: Finished difference. Result has 181 places, 290 transitions, 3348 flow [2024-05-12 13:11:27,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3072, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3348, PETRI_PLACES=181, PETRI_TRANSITIONS=290} [2024-05-12 13:11:27,051 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 125 predicate places. [2024-05-12 13:11:27,051 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 290 transitions, 3348 flow [2024-05-12 13:11:27,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:27,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:27,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:27,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-05-12 13:11:27,052 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:27,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:27,053 INFO L85 PathProgramCache]: Analyzing trace with hash -2117663513, now seen corresponding path program 2 times [2024-05-12 13:11:27,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:27,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571068485] [2024-05-12 13:11:27,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:27,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:27,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:27,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:27,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571068485] [2024-05-12 13:11:27,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571068485] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:27,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:27,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:11:27,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919397887] [2024-05-12 13:11:27,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:27,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:11:27,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:27,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:11:27,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:11:28,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:11:28,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 290 transitions, 3348 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:28,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:28,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:11:28,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:29,362 INFO L124 PetriNetUnfolderBase]: 5559/9128 cut-off events. [2024-05-12 13:11:29,362 INFO L125 PetriNetUnfolderBase]: For 229003/229006 co-relation queries the response was YES. [2024-05-12 13:11:29,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53674 conditions, 9128 events. 5559/9128 cut-off events. For 229003/229006 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 61189 event pairs, 2204 based on Foata normal form. 4/8884 useless extension candidates. Maximal degree in co-relation 53596. Up to 7846 conditions per place. [2024-05-12 13:11:29,458 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 278 selfloop transitions, 42 changer transitions 0/336 dead transitions. [2024-05-12 13:11:29,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 336 transitions, 4230 flow [2024-05-12 13:11:29,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:11:29,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:11:29,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-05-12 13:11:29,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5025 [2024-05-12 13:11:29,459 INFO L175 Difference]: Start difference. First operand has 181 places, 290 transitions, 3348 flow. Second operand 8 states and 201 transitions. [2024-05-12 13:11:29,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 336 transitions, 4230 flow [2024-05-12 13:11:29,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 336 transitions, 3984 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-05-12 13:11:29,767 INFO L231 Difference]: Finished difference. Result has 186 places, 305 transitions, 3372 flow [2024-05-12 13:11:29,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3110, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3372, PETRI_PLACES=186, PETRI_TRANSITIONS=305} [2024-05-12 13:11:29,767 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 130 predicate places. [2024-05-12 13:11:29,767 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 305 transitions, 3372 flow [2024-05-12 13:11:29,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:29,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:29,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:29,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-05-12 13:11:29,768 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:29,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:29,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1966974140, now seen corresponding path program 1 times [2024-05-12 13:11:29,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:29,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569942530] [2024-05-12 13:11:29,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:29,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:29,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:30,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:30,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:30,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569942530] [2024-05-12 13:11:30,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569942530] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:30,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:30,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:11:30,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707570438] [2024-05-12 13:11:30,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:30,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:11:30,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:30,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:11:30,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:11:31,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:11:31,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 305 transitions, 3372 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:31,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:31,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:11:31,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:32,419 INFO L124 PetriNetUnfolderBase]: 5262/8820 cut-off events. [2024-05-12 13:11:32,419 INFO L125 PetriNetUnfolderBase]: For 234362/234371 co-relation queries the response was YES. [2024-05-12 13:11:32,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51320 conditions, 8820 events. 5262/8820 cut-off events. For 234362/234371 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 60824 event pairs, 2286 based on Foata normal form. 9/8580 useless extension candidates. Maximal degree in co-relation 51239. Up to 7336 conditions per place. [2024-05-12 13:11:32,511 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 257 selfloop transitions, 26 changer transitions 0/339 dead transitions. [2024-05-12 13:11:32,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 339 transitions, 4094 flow [2024-05-12 13:11:32,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:11:32,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:11:32,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-05-12 13:11:32,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-05-12 13:11:32,512 INFO L175 Difference]: Start difference. First operand has 186 places, 305 transitions, 3372 flow. Second operand 8 states and 205 transitions. [2024-05-12 13:11:32,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 339 transitions, 4094 flow [2024-05-12 13:11:32,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 339 transitions, 4008 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-05-12 13:11:32,843 INFO L231 Difference]: Finished difference. Result has 191 places, 308 transitions, 3392 flow [2024-05-12 13:11:32,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3286, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3392, PETRI_PLACES=191, PETRI_TRANSITIONS=308} [2024-05-12 13:11:32,844 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 135 predicate places. [2024-05-12 13:11:32,844 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 308 transitions, 3392 flow [2024-05-12 13:11:32,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:32,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:32,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:32,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-05-12 13:11:32,845 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:32,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:32,845 INFO L85 PathProgramCache]: Analyzing trace with hash 519387737, now seen corresponding path program 6 times [2024-05-12 13:11:32,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:32,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79687792] [2024-05-12 13:11:32,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:32,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:32,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:34,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:34,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:34,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79687792] [2024-05-12 13:11:34,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79687792] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:34,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:34,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:11:34,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159376350] [2024-05-12 13:11:34,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:34,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:11:34,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:34,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:11:34,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:11:34,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:11:34,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 308 transitions, 3392 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:34,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:34,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:11:34,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:36,134 INFO L124 PetriNetUnfolderBase]: 5981/9759 cut-off events. [2024-05-12 13:11:36,134 INFO L125 PetriNetUnfolderBase]: For 260145/260145 co-relation queries the response was YES. [2024-05-12 13:11:36,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57747 conditions, 9759 events. 5981/9759 cut-off events. For 260145/260145 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 65045 event pairs, 2067 based on Foata normal form. 4/9518 useless extension candidates. Maximal degree in co-relation 57665. Up to 7386 conditions per place. [2024-05-12 13:11:36,223 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 211 selfloop transitions, 156 changer transitions 0/377 dead transitions. [2024-05-12 13:11:36,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 377 transitions, 4702 flow [2024-05-12 13:11:36,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:11:36,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:11:36,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-05-12 13:11:36,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-05-12 13:11:36,225 INFO L175 Difference]: Start difference. First operand has 191 places, 308 transitions, 3392 flow. Second operand 9 states and 234 transitions. [2024-05-12 13:11:36,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 377 transitions, 4702 flow [2024-05-12 13:11:36,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 377 transitions, 4629 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-05-12 13:11:36,583 INFO L231 Difference]: Finished difference. Result has 196 places, 312 transitions, 3761 flow [2024-05-12 13:11:36,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3319, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3761, PETRI_PLACES=196, PETRI_TRANSITIONS=312} [2024-05-12 13:11:36,584 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 140 predicate places. [2024-05-12 13:11:36,584 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 312 transitions, 3761 flow [2024-05-12 13:11:36,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:36,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:36,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:36,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-05-12 13:11:36,584 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:36,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:36,584 INFO L85 PathProgramCache]: Analyzing trace with hash -826319629, now seen corresponding path program 7 times [2024-05-12 13:11:36,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:36,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313351841] [2024-05-12 13:11:36,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:36,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:36,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:37,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:37,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:37,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313351841] [2024-05-12 13:11:37,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313351841] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:37,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:37,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:11:37,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972393044] [2024-05-12 13:11:37,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:37,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:11:37,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:37,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:11:37,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:11:37,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:11:37,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 312 transitions, 3761 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:37,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:37,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:11:37,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:39,730 INFO L124 PetriNetUnfolderBase]: 5973/9706 cut-off events. [2024-05-12 13:11:39,730 INFO L125 PetriNetUnfolderBase]: For 272909/272909 co-relation queries the response was YES. [2024-05-12 13:11:39,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59078 conditions, 9706 events. 5973/9706 cut-off events. For 272909/272909 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 64329 event pairs, 2105 based on Foata normal form. 4/9473 useless extension candidates. Maximal degree in co-relation 58995. Up to 7731 conditions per place. [2024-05-12 13:11:39,836 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 225 selfloop transitions, 139 changer transitions 0/374 dead transitions. [2024-05-12 13:11:39,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 374 transitions, 4801 flow [2024-05-12 13:11:39,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:11:39,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:11:39,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-05-12 13:11:39,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5155555555555555 [2024-05-12 13:11:39,838 INFO L175 Difference]: Start difference. First operand has 196 places, 312 transitions, 3761 flow. Second operand 9 states and 232 transitions. [2024-05-12 13:11:39,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 374 transitions, 4801 flow [2024-05-12 13:11:40,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 374 transitions, 4544 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-05-12 13:11:40,326 INFO L231 Difference]: Finished difference. Result has 199 places, 312 transitions, 3794 flow [2024-05-12 13:11:40,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3504, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3794, PETRI_PLACES=199, PETRI_TRANSITIONS=312} [2024-05-12 13:11:40,327 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 143 predicate places. [2024-05-12 13:11:40,327 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 312 transitions, 3794 flow [2024-05-12 13:11:40,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:40,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:40,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:40,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-05-12 13:11:40,327 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:40,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:40,328 INFO L85 PathProgramCache]: Analyzing trace with hash -169224868, now seen corresponding path program 2 times [2024-05-12 13:11:40,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:40,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798513533] [2024-05-12 13:11:40,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:40,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:40,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:41,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:41,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:41,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798513533] [2024-05-12 13:11:41,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798513533] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:41,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:41,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:11:41,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923233413] [2024-05-12 13:11:41,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:41,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:11:41,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:41,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:11:41,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:11:41,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:11:41,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 312 transitions, 3794 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:41,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:41,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:11:41,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:43,432 INFO L124 PetriNetUnfolderBase]: 5337/8955 cut-off events. [2024-05-12 13:11:43,432 INFO L125 PetriNetUnfolderBase]: For 257055/257062 co-relation queries the response was YES. [2024-05-12 13:11:43,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54418 conditions, 8955 events. 5337/8955 cut-off events. For 257055/257062 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 62138 event pairs, 2257 based on Foata normal form. 7/8709 useless extension candidates. Maximal degree in co-relation 54334. Up to 7401 conditions per place. [2024-05-12 13:11:43,546 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 254 selfloop transitions, 29 changer transitions 0/341 dead transitions. [2024-05-12 13:11:43,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 341 transitions, 4508 flow [2024-05-12 13:11:43,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:11:43,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:11:43,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-05-12 13:11:43,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5114285714285715 [2024-05-12 13:11:43,547 INFO L175 Difference]: Start difference. First operand has 199 places, 312 transitions, 3794 flow. Second operand 7 states and 179 transitions. [2024-05-12 13:11:43,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 341 transitions, 4508 flow [2024-05-12 13:11:43,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 341 transitions, 4182 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-05-12 13:11:43,883 INFO L231 Difference]: Finished difference. Result has 198 places, 315 transitions, 3590 flow [2024-05-12 13:11:43,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3468, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3590, PETRI_PLACES=198, PETRI_TRANSITIONS=315} [2024-05-12 13:11:43,884 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 142 predicate places. [2024-05-12 13:11:43,884 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 315 transitions, 3590 flow [2024-05-12 13:11:43,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:43,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:43,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:43,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-05-12 13:11:43,884 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:43,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:43,885 INFO L85 PathProgramCache]: Analyzing trace with hash -169225333, now seen corresponding path program 3 times [2024-05-12 13:11:43,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:43,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630896362] [2024-05-12 13:11:43,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:43,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:43,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:44,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:44,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:44,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630896362] [2024-05-12 13:11:44,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630896362] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:44,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:44,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:11:44,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117411176] [2024-05-12 13:11:44,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:44,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:11:44,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:44,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:11:44,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:11:44,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:11:44,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 315 transitions, 3590 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:44,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:44,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:11:44,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:46,329 INFO L124 PetriNetUnfolderBase]: 5684/9336 cut-off events. [2024-05-12 13:11:46,329 INFO L125 PetriNetUnfolderBase]: For 262363/262366 co-relation queries the response was YES. [2024-05-12 13:11:46,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57642 conditions, 9336 events. 5684/9336 cut-off events. For 262363/262366 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 62955 event pairs, 2139 based on Foata normal form. 4/9082 useless extension candidates. Maximal degree in co-relation 57558. Up to 7996 conditions per place. [2024-05-12 13:11:46,435 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 283 selfloop transitions, 45 changer transitions 0/344 dead transitions. [2024-05-12 13:11:46,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 344 transitions, 4408 flow [2024-05-12 13:11:46,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:11:46,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:11:46,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-05-12 13:11:46,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-05-12 13:11:46,437 INFO L175 Difference]: Start difference. First operand has 198 places, 315 transitions, 3590 flow. Second operand 7 states and 175 transitions. [2024-05-12 13:11:46,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 344 transitions, 4408 flow [2024-05-12 13:11:46,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 344 transitions, 4312 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-05-12 13:11:46,763 INFO L231 Difference]: Finished difference. Result has 200 places, 318 transitions, 3662 flow [2024-05-12 13:11:46,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3496, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3662, PETRI_PLACES=200, PETRI_TRANSITIONS=318} [2024-05-12 13:11:46,763 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 144 predicate places. [2024-05-12 13:11:46,763 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 318 transitions, 3662 flow [2024-05-12 13:11:46,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:46,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:46,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:46,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-05-12 13:11:46,764 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:46,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:46,764 INFO L85 PathProgramCache]: Analyzing trace with hash -85354759, now seen corresponding path program 8 times [2024-05-12 13:11:46,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:46,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361418009] [2024-05-12 13:11:46,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:46,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:47,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:47,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:47,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361418009] [2024-05-12 13:11:47,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361418009] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:47,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:47,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:11:47,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178332517] [2024-05-12 13:11:47,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:47,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:11:47,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:47,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:11:47,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:11:47,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:11:47,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 318 transitions, 3662 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:47,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:47,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:11:47,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:49,910 INFO L124 PetriNetUnfolderBase]: 6131/9730 cut-off events. [2024-05-12 13:11:49,910 INFO L125 PetriNetUnfolderBase]: For 268672/268678 co-relation queries the response was YES. [2024-05-12 13:11:49,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60650 conditions, 9730 events. 6131/9730 cut-off events. For 268672/268678 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 63076 event pairs, 1631 based on Foata normal form. 8/9548 useless extension candidates. Maximal degree in co-relation 60565. Up to 7894 conditions per place. [2024-05-12 13:11:50,014 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 232 selfloop transitions, 151 changer transitions 0/393 dead transitions. [2024-05-12 13:11:50,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 393 transitions, 5118 flow [2024-05-12 13:11:50,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:11:50,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:11:50,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-05-12 13:11:50,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5133333333333333 [2024-05-12 13:11:50,016 INFO L175 Difference]: Start difference. First operand has 200 places, 318 transitions, 3662 flow. Second operand 9 states and 231 transitions. [2024-05-12 13:11:50,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 393 transitions, 5118 flow [2024-05-12 13:11:50,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 393 transitions, 4974 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-05-12 13:11:50,457 INFO L231 Difference]: Finished difference. Result has 205 places, 333 transitions, 4150 flow [2024-05-12 13:11:50,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3524, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4150, PETRI_PLACES=205, PETRI_TRANSITIONS=333} [2024-05-12 13:11:50,458 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 149 predicate places. [2024-05-12 13:11:50,458 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 333 transitions, 4150 flow [2024-05-12 13:11:50,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:50,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:50,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:50,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-05-12 13:11:50,458 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:50,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:50,458 INFO L85 PathProgramCache]: Analyzing trace with hash 227145879, now seen corresponding path program 9 times [2024-05-12 13:11:50,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:50,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537993199] [2024-05-12 13:11:50,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:50,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:50,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:51,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:51,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:51,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537993199] [2024-05-12 13:11:51,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537993199] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:51,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:51,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:11:51,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497369442] [2024-05-12 13:11:51,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:51,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:11:51,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:51,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:11:51,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:11:51,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:11:51,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 333 transitions, 4150 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:51,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:51,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:11:51,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:53,771 INFO L124 PetriNetUnfolderBase]: 6123/9709 cut-off events. [2024-05-12 13:11:53,771 INFO L125 PetriNetUnfolderBase]: For 269512/269518 co-relation queries the response was YES. [2024-05-12 13:11:53,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61409 conditions, 9709 events. 6123/9709 cut-off events. For 269512/269518 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 62924 event pairs, 1624 based on Foata normal form. 8/9523 useless extension candidates. Maximal degree in co-relation 61322. Up to 7972 conditions per place. [2024-05-12 13:11:53,879 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 230 selfloop transitions, 149 changer transitions 0/389 dead transitions. [2024-05-12 13:11:53,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 389 transitions, 5186 flow [2024-05-12 13:11:53,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:11:53,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:11:53,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-05-12 13:11:53,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5044444444444445 [2024-05-12 13:11:53,880 INFO L175 Difference]: Start difference. First operand has 205 places, 333 transitions, 4150 flow. Second operand 9 states and 227 transitions. [2024-05-12 13:11:53,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 389 transitions, 5186 flow [2024-05-12 13:11:54,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 389 transitions, 5036 flow, removed 56 selfloop flow, removed 2 redundant places. [2024-05-12 13:11:54,391 INFO L231 Difference]: Finished difference. Result has 212 places, 333 transitions, 4306 flow [2024-05-12 13:11:54,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4000, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4306, PETRI_PLACES=212, PETRI_TRANSITIONS=333} [2024-05-12 13:11:54,392 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 156 predicate places. [2024-05-12 13:11:54,392 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 333 transitions, 4306 flow [2024-05-12 13:11:54,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:54,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:54,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:54,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-05-12 13:11:54,393 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:54,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:54,393 INFO L85 PathProgramCache]: Analyzing trace with hash 238197069, now seen corresponding path program 10 times [2024-05-12 13:11:54,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:54,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382339609] [2024-05-12 13:11:54,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:54,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:54,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:55,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:55,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:55,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382339609] [2024-05-12 13:11:55,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382339609] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:55,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:55,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:11:55,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107032955] [2024-05-12 13:11:55,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:55,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:11:55,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:55,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:11:55,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:11:55,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:11:55,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 333 transitions, 4306 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:55,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:55,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:11:55,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:57,540 INFO L124 PetriNetUnfolderBase]: 6160/9707 cut-off events. [2024-05-12 13:11:57,540 INFO L125 PetriNetUnfolderBase]: For 274360/274366 co-relation queries the response was YES. [2024-05-12 13:11:57,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60795 conditions, 9707 events. 6160/9707 cut-off events. For 274360/274366 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 62181 event pairs, 1439 based on Foata normal form. 8/9537 useless extension candidates. Maximal degree in co-relation 60706. Up to 7284 conditions per place. [2024-05-12 13:11:57,640 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 207 selfloop transitions, 178 changer transitions 0/395 dead transitions. [2024-05-12 13:11:57,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 395 transitions, 5600 flow [2024-05-12 13:11:57,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:11:57,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:11:57,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-05-12 13:11:57,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5133333333333333 [2024-05-12 13:11:57,641 INFO L175 Difference]: Start difference. First operand has 212 places, 333 transitions, 4306 flow. Second operand 9 states and 231 transitions. [2024-05-12 13:11:57,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 395 transitions, 5600 flow [2024-05-12 13:11:58,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 395 transitions, 5291 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-05-12 13:11:58,032 INFO L231 Difference]: Finished difference. Result has 213 places, 337 transitions, 4488 flow [2024-05-12 13:11:58,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3997, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4488, PETRI_PLACES=213, PETRI_TRANSITIONS=337} [2024-05-12 13:11:58,033 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 157 predicate places. [2024-05-12 13:11:58,033 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 337 transitions, 4488 flow [2024-05-12 13:11:58,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:58,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:58,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:58,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-05-12 13:11:58,034 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:58,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:58,035 INFO L85 PathProgramCache]: Analyzing trace with hash -334974199, now seen corresponding path program 11 times [2024-05-12 13:11:58,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:58,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365720933] [2024-05-12 13:11:58,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:58,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:58,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:59,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:59,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:59,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365720933] [2024-05-12 13:11:59,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365720933] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:59,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:59,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:11:59,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365454216] [2024-05-12 13:11:59,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:59,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:11:59,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:59,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:11:59,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:11:59,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:11:59,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 337 transitions, 4488 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:59,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:59,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:11:59,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:01,362 INFO L124 PetriNetUnfolderBase]: 6239/9898 cut-off events. [2024-05-12 13:12:01,362 INFO L125 PetriNetUnfolderBase]: For 291675/291681 co-relation queries the response was YES. [2024-05-12 13:12:01,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62966 conditions, 9898 events. 6239/9898 cut-off events. For 291675/291681 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 64340 event pairs, 1691 based on Foata normal form. 8/9711 useless extension candidates. Maximal degree in co-relation 62876. Up to 8126 conditions per place. [2024-05-12 13:12:01,465 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 246 selfloop transitions, 146 changer transitions 0/402 dead transitions. [2024-05-12 13:12:01,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 402 transitions, 5732 flow [2024-05-12 13:12:01,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:12:01,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:12:01,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-05-12 13:12:01,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5088888888888888 [2024-05-12 13:12:01,466 INFO L175 Difference]: Start difference. First operand has 213 places, 337 transitions, 4488 flow. Second operand 9 states and 229 transitions. [2024-05-12 13:12:01,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 402 transitions, 5732 flow [2024-05-12 13:12:01,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 402 transitions, 5465 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-05-12 13:12:01,989 INFO L231 Difference]: Finished difference. Result has 217 places, 345 transitions, 4693 flow [2024-05-12 13:12:01,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4237, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4693, PETRI_PLACES=217, PETRI_TRANSITIONS=345} [2024-05-12 13:12:01,990 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 161 predicate places. [2024-05-12 13:12:01,990 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 345 transitions, 4693 flow [2024-05-12 13:12:01,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:01,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:01,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:01,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-05-12 13:12:01,990 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:01,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:01,990 INFO L85 PathProgramCache]: Analyzing trace with hash -334705429, now seen corresponding path program 12 times [2024-05-12 13:12:01,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:01,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695760734] [2024-05-12 13:12:01,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:01,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:02,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:03,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:03,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:03,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695760734] [2024-05-12 13:12:03,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695760734] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:03,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:03,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:12:03,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498178063] [2024-05-12 13:12:03,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:03,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:12:03,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:03,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:12:03,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:12:03,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:12:03,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 345 transitions, 4693 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:03,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:03,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:12:03,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:05,319 INFO L124 PetriNetUnfolderBase]: 6276/9941 cut-off events. [2024-05-12 13:12:05,320 INFO L125 PetriNetUnfolderBase]: For 292796/292802 co-relation queries the response was YES. [2024-05-12 13:12:05,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63363 conditions, 9941 events. 6276/9941 cut-off events. For 292796/292802 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 64551 event pairs, 1666 based on Foata normal form. 8/9753 useless extension candidates. Maximal degree in co-relation 63271. Up to 8050 conditions per place. [2024-05-12 13:12:05,441 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 246 selfloop transitions, 150 changer transitions 0/406 dead transitions. [2024-05-12 13:12:05,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 406 transitions, 5983 flow [2024-05-12 13:12:05,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:12:05,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:12:05,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-05-12 13:12:05,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5155555555555555 [2024-05-12 13:12:05,442 INFO L175 Difference]: Start difference. First operand has 217 places, 345 transitions, 4693 flow. Second operand 9 states and 232 transitions. [2024-05-12 13:12:05,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 406 transitions, 5983 flow [2024-05-12 13:12:06,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 406 transitions, 5591 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-05-12 13:12:06,047 INFO L231 Difference]: Finished difference. Result has 220 places, 347 transitions, 4668 flow [2024-05-12 13:12:06,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4301, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4668, PETRI_PLACES=220, PETRI_TRANSITIONS=347} [2024-05-12 13:12:06,048 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 164 predicate places. [2024-05-12 13:12:06,048 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 347 transitions, 4668 flow [2024-05-12 13:12:06,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:06,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:06,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:06,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-05-12 13:12:06,049 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:06,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:06,049 INFO L85 PathProgramCache]: Analyzing trace with hash -342124039, now seen corresponding path program 13 times [2024-05-12 13:12:06,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:06,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486804484] [2024-05-12 13:12:06,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:06,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:06,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:07,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:07,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:07,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486804484] [2024-05-12 13:12:07,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486804484] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:07,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:07,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:12:07,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391210800] [2024-05-12 13:12:07,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:07,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:12:07,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:07,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:12:07,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:12:07,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:12:07,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 347 transitions, 4668 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:07,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:07,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:12:07,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:09,609 INFO L124 PetriNetUnfolderBase]: 6268/9939 cut-off events. [2024-05-12 13:12:09,610 INFO L125 PetriNetUnfolderBase]: For 296386/296392 co-relation queries the response was YES. [2024-05-12 13:12:09,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62924 conditions, 9939 events. 6268/9939 cut-off events. For 296386/296392 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 64605 event pairs, 1685 based on Foata normal form. 8/9749 useless extension candidates. Maximal degree in co-relation 62832. Up to 8169 conditions per place. [2024-05-12 13:12:09,700 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 241 selfloop transitions, 149 changer transitions 0/400 dead transitions. [2024-05-12 13:12:09,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 400 transitions, 5696 flow [2024-05-12 13:12:09,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:12:09,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:12:09,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-05-12 13:12:09,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5066666666666667 [2024-05-12 13:12:09,702 INFO L175 Difference]: Start difference. First operand has 220 places, 347 transitions, 4668 flow. Second operand 9 states and 228 transitions. [2024-05-12 13:12:09,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 400 transitions, 5696 flow [2024-05-12 13:12:10,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 400 transitions, 5003 flow, removed 49 selfloop flow, removed 9 redundant places. [2024-05-12 13:12:10,120 INFO L231 Difference]: Finished difference. Result has 220 places, 347 transitions, 4281 flow [2024-05-12 13:12:10,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3975, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4281, PETRI_PLACES=220, PETRI_TRANSITIONS=347} [2024-05-12 13:12:10,121 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 164 predicate places. [2024-05-12 13:12:10,121 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 347 transitions, 4281 flow [2024-05-12 13:12:10,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:10,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:10,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:10,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-05-12 13:12:10,121 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:10,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:10,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1478691413, now seen corresponding path program 4 times [2024-05-12 13:12:10,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:10,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795753711] [2024-05-12 13:12:10,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:10,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:10,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:11,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:11,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:11,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795753711] [2024-05-12 13:12:11,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795753711] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:11,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:11,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:12:11,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369575151] [2024-05-12 13:12:11,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:11,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:12:11,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:11,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:12:11,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:12:11,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:12:11,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 347 transitions, 4281 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:11,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:11,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:12:11,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:12,635 INFO L124 PetriNetUnfolderBase]: 5960/9850 cut-off events. [2024-05-12 13:12:12,635 INFO L125 PetriNetUnfolderBase]: For 297607/297613 co-relation queries the response was YES. [2024-05-12 13:12:12,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59572 conditions, 9850 events. 5960/9850 cut-off events. For 297607/297613 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 67364 event pairs, 1715 based on Foata normal form. 5/9559 useless extension candidates. Maximal degree in co-relation 59481. Up to 8347 conditions per place. [2024-05-12 13:12:12,753 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 307 selfloop transitions, 50 changer transitions 0/373 dead transitions. [2024-05-12 13:12:12,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 373 transitions, 5149 flow [2024-05-12 13:12:12,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:12:12,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:12:12,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-05-12 13:12:12,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49142857142857144 [2024-05-12 13:12:12,754 INFO L175 Difference]: Start difference. First operand has 220 places, 347 transitions, 4281 flow. Second operand 7 states and 172 transitions. [2024-05-12 13:12:12,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 373 transitions, 5149 flow [2024-05-12 13:12:13,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 373 transitions, 4796 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-05-12 13:12:13,203 INFO L231 Difference]: Finished difference. Result has 218 places, 350 transitions, 4100 flow [2024-05-12 13:12:13,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3928, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4100, PETRI_PLACES=218, PETRI_TRANSITIONS=350} [2024-05-12 13:12:13,204 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 162 predicate places. [2024-05-12 13:12:13,204 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 350 transitions, 4100 flow [2024-05-12 13:12:13,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:13,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:13,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:13,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-05-12 13:12:13,204 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:13,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:13,204 INFO L85 PathProgramCache]: Analyzing trace with hash 245004572, now seen corresponding path program 3 times [2024-05-12 13:12:13,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:13,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396391918] [2024-05-12 13:12:13,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:13,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:13,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:14,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:14,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:14,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396391918] [2024-05-12 13:12:14,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396391918] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:14,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:14,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:12:14,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063137248] [2024-05-12 13:12:14,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:14,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:12:14,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:14,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:12:14,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:12:14,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:12:14,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 350 transitions, 4100 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:14,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:14,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:12:14,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:15,930 INFO L124 PetriNetUnfolderBase]: 5623/9727 cut-off events. [2024-05-12 13:12:15,930 INFO L125 PetriNetUnfolderBase]: For 307226/307241 co-relation queries the response was YES. [2024-05-12 13:12:16,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56486 conditions, 9727 events. 5623/9727 cut-off events. For 307226/307241 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 70226 event pairs, 2295 based on Foata normal form. 12/9402 useless extension candidates. Maximal degree in co-relation 56395. Up to 7739 conditions per place. [2024-05-12 13:12:16,056 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 274 selfloop transitions, 30 changer transitions 0/376 dead transitions. [2024-05-12 13:12:16,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 376 transitions, 4852 flow [2024-05-12 13:12:16,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:12:16,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:12:16,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-05-12 13:12:16,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5028571428571429 [2024-05-12 13:12:16,057 INFO L175 Difference]: Start difference. First operand has 218 places, 350 transitions, 4100 flow. Second operand 7 states and 176 transitions. [2024-05-12 13:12:16,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 376 transitions, 4852 flow [2024-05-12 13:12:16,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 376 transitions, 4702 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-05-12 13:12:16,508 INFO L231 Difference]: Finished difference. Result has 220 places, 353 transitions, 4072 flow [2024-05-12 13:12:16,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3950, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4072, PETRI_PLACES=220, PETRI_TRANSITIONS=353} [2024-05-12 13:12:16,509 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 164 predicate places. [2024-05-12 13:12:16,509 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 353 transitions, 4072 flow [2024-05-12 13:12:16,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:16,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:16,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:16,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-05-12 13:12:16,510 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:16,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:16,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1478185958, now seen corresponding path program 4 times [2024-05-12 13:12:16,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:16,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465269039] [2024-05-12 13:12:16,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:16,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:16,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:17,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:17,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:17,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465269039] [2024-05-12 13:12:17,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465269039] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:17,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:17,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:12:17,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615070619] [2024-05-12 13:12:17,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:17,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:12:17,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:17,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:12:17,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:12:17,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:12:17,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 353 transitions, 4072 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:17,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:17,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:12:17,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:19,506 INFO L124 PetriNetUnfolderBase]: 5625/9737 cut-off events. [2024-05-12 13:12:19,507 INFO L125 PetriNetUnfolderBase]: For 318379/318394 co-relation queries the response was YES. [2024-05-12 13:12:19,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57204 conditions, 9737 events. 5625/9737 cut-off events. For 318379/318394 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 70306 event pairs, 2295 based on Foata normal form. 12/9412 useless extension candidates. Maximal degree in co-relation 57112. Up to 7698 conditions per place. [2024-05-12 13:12:19,652 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 269 selfloop transitions, 41 changer transitions 0/382 dead transitions. [2024-05-12 13:12:19,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 382 transitions, 4856 flow [2024-05-12 13:12:19,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:12:19,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:12:19,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-05-12 13:12:19,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5057142857142857 [2024-05-12 13:12:19,654 INFO L175 Difference]: Start difference. First operand has 220 places, 353 transitions, 4072 flow. Second operand 7 states and 177 transitions. [2024-05-12 13:12:19,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 382 transitions, 4856 flow [2024-05-12 13:12:20,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 382 transitions, 4756 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-05-12 13:12:20,196 INFO L231 Difference]: Finished difference. Result has 223 places, 359 transitions, 4156 flow [2024-05-12 13:12:20,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3972, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4156, PETRI_PLACES=223, PETRI_TRANSITIONS=359} [2024-05-12 13:12:20,197 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 167 predicate places. [2024-05-12 13:12:20,197 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 359 transitions, 4156 flow [2024-05-12 13:12:20,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:20,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:20,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:20,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-05-12 13:12:20,198 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:20,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:20,198 INFO L85 PathProgramCache]: Analyzing trace with hash 67190711, now seen corresponding path program 1 times [2024-05-12 13:12:20,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:20,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879208822] [2024-05-12 13:12:20,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:20,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:20,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:21,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:21,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:21,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879208822] [2024-05-12 13:12:21,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879208822] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:21,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:21,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:12:21,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413099834] [2024-05-12 13:12:21,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:21,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:12:21,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:21,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:12:21,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:12:21,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:12:21,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 359 transitions, 4156 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:21,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:21,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:12:21,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:23,103 INFO L124 PetriNetUnfolderBase]: 5624/9485 cut-off events. [2024-05-12 13:12:23,103 INFO L125 PetriNetUnfolderBase]: For 333825/333867 co-relation queries the response was YES. [2024-05-12 13:12:23,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57639 conditions, 9485 events. 5624/9485 cut-off events. For 333825/333867 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 66495 event pairs, 2311 based on Foata normal form. 7/9238 useless extension candidates. Maximal degree in co-relation 57545. Up to 7706 conditions per place. [2024-05-12 13:12:23,222 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 300 selfloop transitions, 19 changer transitions 0/391 dead transitions. [2024-05-12 13:12:23,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 391 transitions, 4992 flow [2024-05-12 13:12:23,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:12:23,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:12:23,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-05-12 13:12:23,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.485 [2024-05-12 13:12:23,223 INFO L175 Difference]: Start difference. First operand has 223 places, 359 transitions, 4156 flow. Second operand 8 states and 194 transitions. [2024-05-12 13:12:23,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 391 transitions, 4992 flow [2024-05-12 13:12:23,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 391 transitions, 4911 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-05-12 13:12:23,705 INFO L231 Difference]: Finished difference. Result has 229 places, 366 transitions, 4242 flow [2024-05-12 13:12:23,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4075, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4242, PETRI_PLACES=229, PETRI_TRANSITIONS=366} [2024-05-12 13:12:23,706 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 173 predicate places. [2024-05-12 13:12:23,706 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 366 transitions, 4242 flow [2024-05-12 13:12:23,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:23,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:23,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:23,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-05-12 13:12:23,706 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:23,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:23,707 INFO L85 PathProgramCache]: Analyzing trace with hash 67196508, now seen corresponding path program 1 times [2024-05-12 13:12:23,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:23,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236711566] [2024-05-12 13:12:23,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:23,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:23,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:24,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:24,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:24,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236711566] [2024-05-12 13:12:24,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236711566] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:24,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:24,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:12:24,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50972797] [2024-05-12 13:12:24,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:24,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:12:24,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:24,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:12:24,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:12:24,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:12:24,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 366 transitions, 4242 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:24,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:24,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:12:24,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:26,627 INFO L124 PetriNetUnfolderBase]: 5639/9521 cut-off events. [2024-05-12 13:12:26,627 INFO L125 PetriNetUnfolderBase]: For 351246/351288 co-relation queries the response was YES. [2024-05-12 13:12:26,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58953 conditions, 9521 events. 5639/9521 cut-off events. For 351246/351288 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 66985 event pairs, 2315 based on Foata normal form. 10/9277 useless extension candidates. Maximal degree in co-relation 58856. Up to 7705 conditions per place. [2024-05-12 13:12:26,735 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 305 selfloop transitions, 18 changer transitions 0/395 dead transitions. [2024-05-12 13:12:26,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 395 transitions, 5034 flow [2024-05-12 13:12:26,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:12:26,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:12:26,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-05-12 13:12:26,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5085714285714286 [2024-05-12 13:12:26,736 INFO L175 Difference]: Start difference. First operand has 229 places, 366 transitions, 4242 flow. Second operand 7 states and 178 transitions. [2024-05-12 13:12:26,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 395 transitions, 5034 flow [2024-05-12 13:12:27,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 395 transitions, 4908 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-05-12 13:12:27,254 INFO L231 Difference]: Finished difference. Result has 231 places, 370 transitions, 4211 flow [2024-05-12 13:12:27,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4116, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4211, PETRI_PLACES=231, PETRI_TRANSITIONS=370} [2024-05-12 13:12:27,255 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 175 predicate places. [2024-05-12 13:12:27,255 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 370 transitions, 4211 flow [2024-05-12 13:12:27,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:27,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:27,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:27,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-05-12 13:12:27,256 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:27,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:27,256 INFO L85 PathProgramCache]: Analyzing trace with hash 245250588, now seen corresponding path program 2 times [2024-05-12 13:12:27,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:27,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470660592] [2024-05-12 13:12:27,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:27,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:28,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:28,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:28,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470660592] [2024-05-12 13:12:28,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470660592] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:28,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:28,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:12:28,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147258784] [2024-05-12 13:12:28,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:28,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:12:28,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:28,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:12:28,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:12:28,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:12:28,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 370 transitions, 4211 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:28,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:28,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:12:28,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:30,431 INFO L124 PetriNetUnfolderBase]: 5710/9837 cut-off events. [2024-05-12 13:12:30,431 INFO L125 PetriNetUnfolderBase]: For 368187/368238 co-relation queries the response was YES. [2024-05-12 13:12:30,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60908 conditions, 9837 events. 5710/9837 cut-off events. For 368187/368238 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 70690 event pairs, 2306 based on Foata normal form. 18/9546 useless extension candidates. Maximal degree in co-relation 60811. Up to 7744 conditions per place. [2024-05-12 13:12:30,536 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 305 selfloop transitions, 23 changer transitions 0/400 dead transitions. [2024-05-12 13:12:30,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 400 transitions, 5035 flow [2024-05-12 13:12:30,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:12:30,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:12:30,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-05-12 13:12:30,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-05-12 13:12:30,537 INFO L175 Difference]: Start difference. First operand has 231 places, 370 transitions, 4211 flow. Second operand 7 states and 180 transitions. [2024-05-12 13:12:30,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 400 transitions, 5035 flow [2024-05-12 13:12:31,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 400 transitions, 4968 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-05-12 13:12:31,048 INFO L231 Difference]: Finished difference. Result has 233 places, 374 transitions, 4257 flow [2024-05-12 13:12:31,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4144, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4257, PETRI_PLACES=233, PETRI_TRANSITIONS=374} [2024-05-12 13:12:31,048 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 177 predicate places. [2024-05-12 13:12:31,048 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 374 transitions, 4257 flow [2024-05-12 13:12:31,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:31,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:31,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:31,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-05-12 13:12:31,049 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:31,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:31,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1478178022, now seen corresponding path program 3 times [2024-05-12 13:12:31,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:31,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68327655] [2024-05-12 13:12:31,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:31,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:31,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:32,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:32,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:32,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68327655] [2024-05-12 13:12:32,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68327655] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:32,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:32,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:12:32,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711475924] [2024-05-12 13:12:32,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:32,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:12:32,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:32,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:12:32,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:12:32,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:12:32,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 374 transitions, 4257 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:32,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:32,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:12:32,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:34,004 INFO L124 PetriNetUnfolderBase]: 5752/9909 cut-off events. [2024-05-12 13:12:34,004 INFO L125 PetriNetUnfolderBase]: For 376800/376851 co-relation queries the response was YES. [2024-05-12 13:12:34,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62549 conditions, 9909 events. 5752/9909 cut-off events. For 376800/376851 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 71368 event pairs, 2299 based on Foata normal form. 15/9608 useless extension candidates. Maximal degree in co-relation 62451. Up to 7700 conditions per place. [2024-05-12 13:12:34,143 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 299 selfloop transitions, 37 changer transitions 0/408 dead transitions. [2024-05-12 13:12:34,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 408 transitions, 5245 flow [2024-05-12 13:12:34,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:12:34,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:12:34,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-05-12 13:12:34,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-05-12 13:12:34,144 INFO L175 Difference]: Start difference. First operand has 233 places, 374 transitions, 4257 flow. Second operand 7 states and 182 transitions. [2024-05-12 13:12:34,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 408 transitions, 5245 flow [2024-05-12 13:12:34,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 408 transitions, 5166 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-05-12 13:12:34,767 INFO L231 Difference]: Finished difference. Result has 236 places, 381 transitions, 4384 flow [2024-05-12 13:12:34,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4178, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4384, PETRI_PLACES=236, PETRI_TRANSITIONS=381} [2024-05-12 13:12:34,768 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 180 predicate places. [2024-05-12 13:12:34,768 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 381 transitions, 4384 flow [2024-05-12 13:12:34,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:34,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:34,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:34,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-05-12 13:12:34,768 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:34,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:34,769 INFO L85 PathProgramCache]: Analyzing trace with hash 985359704, now seen corresponding path program 1 times [2024-05-12 13:12:34,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:34,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15416785] [2024-05-12 13:12:34,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:34,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:34,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:35,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:35,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:35,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15416785] [2024-05-12 13:12:35,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15416785] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:35,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:35,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:12:35,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997078641] [2024-05-12 13:12:35,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:35,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:12:35,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:35,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:12:35,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:12:35,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:12:35,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 381 transitions, 4384 flow. Second operand has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:35,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:35,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:12:35,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:37,855 INFO L124 PetriNetUnfolderBase]: 7033/11479 cut-off events. [2024-05-12 13:12:37,855 INFO L125 PetriNetUnfolderBase]: For 477955/477955 co-relation queries the response was YES. [2024-05-12 13:12:37,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77387 conditions, 11479 events. 7033/11479 cut-off events. For 477955/477955 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 78698 event pairs, 1851 based on Foata normal form. 16/11218 useless extension candidates. Maximal degree in co-relation 77287. Up to 7792 conditions per place. [2024-05-12 13:12:38,005 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 276 selfloop transitions, 185 changer transitions 0/471 dead transitions. [2024-05-12 13:12:38,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 471 transitions, 6156 flow [2024-05-12 13:12:38,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:12:38,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:12:38,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 279 transitions. [2024-05-12 13:12:38,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.558 [2024-05-12 13:12:38,007 INFO L175 Difference]: Start difference. First operand has 236 places, 381 transitions, 4384 flow. Second operand 10 states and 279 transitions. [2024-05-12 13:12:38,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 471 transitions, 6156 flow [2024-05-12 13:12:38,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 471 transitions, 6099 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-05-12 13:12:38,761 INFO L231 Difference]: Finished difference. Result has 245 places, 390 transitions, 4893 flow [2024-05-12 13:12:38,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4327, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4893, PETRI_PLACES=245, PETRI_TRANSITIONS=390} [2024-05-12 13:12:38,761 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 189 predicate places. [2024-05-12 13:12:38,762 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 390 transitions, 4893 flow [2024-05-12 13:12:38,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:38,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:38,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:38,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-05-12 13:12:38,762 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:38,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:38,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1038323422, now seen corresponding path program 2 times [2024-05-12 13:12:38,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:38,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042608084] [2024-05-12 13:12:38,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:38,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:38,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:39,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:39,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:39,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042608084] [2024-05-12 13:12:39,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042608084] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:39,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:39,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:12:39,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924482152] [2024-05-12 13:12:39,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:39,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:12:39,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:39,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:12:39,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:12:39,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:12:39,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 390 transitions, 4893 flow. Second operand has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:39,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:39,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:12:39,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:42,268 INFO L124 PetriNetUnfolderBase]: 8306/13730 cut-off events. [2024-05-12 13:12:42,268 INFO L125 PetriNetUnfolderBase]: For 619900/619908 co-relation queries the response was YES. [2024-05-12 13:12:42,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96539 conditions, 13730 events. 8306/13730 cut-off events. For 619900/619908 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 98283 event pairs, 2458 based on Foata normal form. 30/13418 useless extension candidates. Maximal degree in co-relation 96435. Up to 9229 conditions per place. [2024-05-12 13:12:42,460 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 284 selfloop transitions, 220 changer transitions 0/514 dead transitions. [2024-05-12 13:12:42,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 514 transitions, 7035 flow [2024-05-12 13:12:42,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:12:42,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:12:42,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 277 transitions. [2024-05-12 13:12:42,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554 [2024-05-12 13:12:42,462 INFO L175 Difference]: Start difference. First operand has 245 places, 390 transitions, 4893 flow. Second operand 10 states and 277 transitions. [2024-05-12 13:12:42,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 514 transitions, 7035 flow [2024-05-12 13:12:43,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 514 transitions, 6670 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-05-12 13:12:43,483 INFO L231 Difference]: Finished difference. Result has 253 places, 434 transitions, 5665 flow [2024-05-12 13:12:43,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4612, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5665, PETRI_PLACES=253, PETRI_TRANSITIONS=434} [2024-05-12 13:12:43,483 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 197 predicate places. [2024-05-12 13:12:43,483 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 434 transitions, 5665 flow [2024-05-12 13:12:43,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:43,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:43,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:43,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-05-12 13:12:43,484 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:43,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:43,485 INFO L85 PathProgramCache]: Analyzing trace with hash -744899090, now seen corresponding path program 3 times [2024-05-12 13:12:43,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:43,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865874347] [2024-05-12 13:12:43,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:43,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:43,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:44,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:44,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:44,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865874347] [2024-05-12 13:12:44,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865874347] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:44,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:44,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:12:44,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132778701] [2024-05-12 13:12:44,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:44,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:12:44,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:44,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:12:44,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:12:44,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:12:44,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 434 transitions, 5665 flow. Second operand has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:44,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:44,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:12:44,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:47,384 INFO L124 PetriNetUnfolderBase]: 9002/15032 cut-off events. [2024-05-12 13:12:47,384 INFO L125 PetriNetUnfolderBase]: For 686391/686407 co-relation queries the response was YES. [2024-05-12 13:12:47,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106691 conditions, 15032 events. 9002/15032 cut-off events. For 686391/686407 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 110737 event pairs, 2781 based on Foata normal form. 78/14714 useless extension candidates. Maximal degree in co-relation 106582. Up to 10391 conditions per place. [2024-05-12 13:12:47,612 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 291 selfloop transitions, 226 changer transitions 0/527 dead transitions. [2024-05-12 13:12:47,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 527 transitions, 7437 flow [2024-05-12 13:12:47,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:12:47,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:12:47,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 273 transitions. [2024-05-12 13:12:47,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546 [2024-05-12 13:12:47,613 INFO L175 Difference]: Start difference. First operand has 253 places, 434 transitions, 5665 flow. Second operand 10 states and 273 transitions. [2024-05-12 13:12:47,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 527 transitions, 7437 flow [2024-05-12 13:12:48,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 527 transitions, 7184 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-05-12 13:12:48,977 INFO L231 Difference]: Finished difference. Result has 260 places, 454 transitions, 6328 flow [2024-05-12 13:12:48,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5424, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6328, PETRI_PLACES=260, PETRI_TRANSITIONS=454} [2024-05-12 13:12:48,978 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 204 predicate places. [2024-05-12 13:12:48,978 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 454 transitions, 6328 flow [2024-05-12 13:12:48,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:48,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:48,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:48,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-05-12 13:12:48,979 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:48,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:48,979 INFO L85 PathProgramCache]: Analyzing trace with hash 734707140, now seen corresponding path program 4 times [2024-05-12 13:12:48,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:48,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149962821] [2024-05-12 13:12:48,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:48,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:48,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:49,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:49,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:49,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149962821] [2024-05-12 13:12:49,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149962821] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:49,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:49,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:12:49,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142434048] [2024-05-12 13:12:49,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:49,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:12:49,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:49,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:12:49,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:12:50,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:12:50,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 454 transitions, 6328 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:50,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:50,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:12:50,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:53,962 INFO L124 PetriNetUnfolderBase]: 10709/17981 cut-off events. [2024-05-12 13:12:53,962 INFO L125 PetriNetUnfolderBase]: For 801473/801485 co-relation queries the response was YES. [2024-05-12 13:12:54,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133246 conditions, 17981 events. 10709/17981 cut-off events. For 801473/801485 co-relation queries the response was YES. Maximal size of possible extension queue 800. Compared 138434 event pairs, 3768 based on Foata normal form. 36/17562 useless extension candidates. Maximal degree in co-relation 133134. Up to 13477 conditions per place. [2024-05-12 13:12:54,247 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 482 selfloop transitions, 93 changer transitions 0/585 dead transitions. [2024-05-12 13:12:54,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 585 transitions, 8890 flow [2024-05-12 13:12:54,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 13:12:54,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 13:12:54,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 316 transitions. [2024-05-12 13:12:54,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5266666666666666 [2024-05-12 13:12:54,249 INFO L175 Difference]: Start difference. First operand has 260 places, 454 transitions, 6328 flow. Second operand 12 states and 316 transitions. [2024-05-12 13:12:54,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 585 transitions, 8890 flow [2024-05-12 13:12:57,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 585 transitions, 8406 flow, removed 74 selfloop flow, removed 5 redundant places. [2024-05-12 13:12:57,253 INFO L231 Difference]: Finished difference. Result has 270 places, 491 transitions, 6890 flow [2024-05-12 13:12:57,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5921, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6890, PETRI_PLACES=270, PETRI_TRANSITIONS=491} [2024-05-12 13:12:57,254 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 214 predicate places. [2024-05-12 13:12:57,254 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 491 transitions, 6890 flow [2024-05-12 13:12:57,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:57,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:57,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:57,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-05-12 13:12:57,255 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:57,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:57,255 INFO L85 PathProgramCache]: Analyzing trace with hash 737564100, now seen corresponding path program 5 times [2024-05-12 13:12:57,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:57,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958038114] [2024-05-12 13:12:57,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:57,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:57,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:58,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:58,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:58,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958038114] [2024-05-12 13:12:58,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958038114] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:58,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:58,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:12:58,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724378552] [2024-05-12 13:12:58,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:58,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:12:58,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:58,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:12:58,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:12:58,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:12:58,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 491 transitions, 6890 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:58,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:58,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:12:58,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:02,945 INFO L124 PetriNetUnfolderBase]: 10627/17953 cut-off events. [2024-05-12 13:13:02,946 INFO L125 PetriNetUnfolderBase]: For 756943/756955 co-relation queries the response was YES. [2024-05-12 13:13:03,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127408 conditions, 17953 events. 10627/17953 cut-off events. For 756943/756955 co-relation queries the response was YES. Maximal size of possible extension queue 792. Compared 139091 event pairs, 4009 based on Foata normal form. 52/17523 useless extension candidates. Maximal degree in co-relation 127292. Up to 14230 conditions per place. [2024-05-12 13:13:03,178 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 480 selfloop transitions, 79 changer transitions 0/569 dead transitions. [2024-05-12 13:13:03,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 569 transitions, 8406 flow [2024-05-12 13:13:03,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 13:13:03,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 13:13:03,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 286 transitions. [2024-05-12 13:13:03,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-05-12 13:13:03,179 INFO L175 Difference]: Start difference. First operand has 270 places, 491 transitions, 6890 flow. Second operand 11 states and 286 transitions. [2024-05-12 13:13:03,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 569 transitions, 8406 flow [2024-05-12 13:13:05,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 569 transitions, 8230 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-05-12 13:13:05,367 INFO L231 Difference]: Finished difference. Result has 277 places, 491 transitions, 6888 flow [2024-05-12 13:13:05,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=6714, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6888, PETRI_PLACES=277, PETRI_TRANSITIONS=491} [2024-05-12 13:13:05,367 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 221 predicate places. [2024-05-12 13:13:05,367 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 491 transitions, 6888 flow [2024-05-12 13:13:05,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:05,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:05,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:05,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-05-12 13:13:05,368 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:05,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:05,368 INFO L85 PathProgramCache]: Analyzing trace with hash 581647326, now seen corresponding path program 1 times [2024-05-12 13:13:05,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:05,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442291835] [2024-05-12 13:13:05,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:05,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:05,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:06,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:06,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:06,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442291835] [2024-05-12 13:13:06,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442291835] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:06,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:06,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:13:06,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665622677] [2024-05-12 13:13:06,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:06,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:13:06,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:06,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:13:06,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:13:06,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:13:06,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 491 transitions, 6888 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:06,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:06,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:13:06,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:10,627 INFO L124 PetriNetUnfolderBase]: 10198/17504 cut-off events. [2024-05-12 13:13:10,627 INFO L125 PetriNetUnfolderBase]: For 675463/675597 co-relation queries the response was YES. [2024-05-12 13:13:10,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122855 conditions, 17504 events. 10198/17504 cut-off events. For 675463/675597 co-relation queries the response was YES. Maximal size of possible extension queue 776. Compared 138393 event pairs, 4158 based on Foata normal form. 116/17092 useless extension candidates. Maximal degree in co-relation 122737. Up to 14634 conditions per place. [2024-05-12 13:13:10,872 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 478 selfloop transitions, 53 changer transitions 0/556 dead transitions. [2024-05-12 13:13:10,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 556 transitions, 8472 flow [2024-05-12 13:13:10,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:13:10,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:13:10,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-05-12 13:13:10,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2024-05-12 13:13:10,873 INFO L175 Difference]: Start difference. First operand has 277 places, 491 transitions, 6888 flow. Second operand 9 states and 230 transitions. [2024-05-12 13:13:10,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 556 transitions, 8472 flow [2024-05-12 13:13:12,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 556 transitions, 8286 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-05-12 13:13:12,400 INFO L231 Difference]: Finished difference. Result has 279 places, 512 transitions, 7217 flow [2024-05-12 13:13:12,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=6734, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7217, PETRI_PLACES=279, PETRI_TRANSITIONS=512} [2024-05-12 13:13:12,401 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 223 predicate places. [2024-05-12 13:13:12,401 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 512 transitions, 7217 flow [2024-05-12 13:13:12,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:12,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:12,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:12,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-05-12 13:13:12,402 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:12,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:12,402 INFO L85 PathProgramCache]: Analyzing trace with hash -2110734780, now seen corresponding path program 6 times [2024-05-12 13:13:12,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:12,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769709750] [2024-05-12 13:13:12,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:12,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:12,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:13,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:13,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:13,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769709750] [2024-05-12 13:13:13,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769709750] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:13,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:13,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:13:13,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268443744] [2024-05-12 13:13:13,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:13,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:13:13,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:13,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:13:13,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:13:13,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:13:13,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 512 transitions, 7217 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:13,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:13,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:13:13,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:19,640 INFO L124 PetriNetUnfolderBase]: 13322/22650 cut-off events. [2024-05-12 13:13:19,640 INFO L125 PetriNetUnfolderBase]: For 916957/916981 co-relation queries the response was YES. [2024-05-12 13:13:19,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164056 conditions, 22650 events. 13322/22650 cut-off events. For 916957/916981 co-relation queries the response was YES. Maximal size of possible extension queue 1035. Compared 183872 event pairs, 4668 based on Foata normal form. 48/22084 useless extension candidates. Maximal degree in co-relation 163935. Up to 16382 conditions per place. [2024-05-12 13:13:19,976 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 526 selfloop transitions, 175 changer transitions 0/711 dead transitions. [2024-05-12 13:13:19,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 711 transitions, 11298 flow [2024-05-12 13:13:19,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 13:13:19,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 13:13:19,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 316 transitions. [2024-05-12 13:13:19,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5266666666666666 [2024-05-12 13:13:19,978 INFO L175 Difference]: Start difference. First operand has 279 places, 512 transitions, 7217 flow. Second operand 12 states and 316 transitions. [2024-05-12 13:13:19,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 711 transitions, 11298 flow [2024-05-12 13:13:22,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 711 transitions, 11085 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-05-12 13:13:22,379 INFO L231 Difference]: Finished difference. Result has 291 places, 614 transitions, 9609 flow [2024-05-12 13:13:22,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=7072, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9609, PETRI_PLACES=291, PETRI_TRANSITIONS=614} [2024-05-12 13:13:22,380 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 235 predicate places. [2024-05-12 13:13:22,380 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 614 transitions, 9609 flow [2024-05-12 13:13:22,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:22,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:22,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:22,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-05-12 13:13:22,380 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:22,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:22,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1982426834, now seen corresponding path program 7 times [2024-05-12 13:13:22,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:22,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501784153] [2024-05-12 13:13:22,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:22,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:22,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:23,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:23,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:23,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501784153] [2024-05-12 13:13:23,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501784153] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:23,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:23,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:13:23,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697798104] [2024-05-12 13:13:23,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:23,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:13:23,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:23,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:13:23,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:13:23,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:13:23,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 614 transitions, 9609 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:23,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:23,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:13:23,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:30,475 INFO L124 PetriNetUnfolderBase]: 15291/26398 cut-off events. [2024-05-12 13:13:30,475 INFO L125 PetriNetUnfolderBase]: For 1086861/1086885 co-relation queries the response was YES. [2024-05-12 13:13:30,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193557 conditions, 26398 events. 15291/26398 cut-off events. For 1086861/1086885 co-relation queries the response was YES. Maximal size of possible extension queue 1195. Compared 222503 event pairs, 4791 based on Foata normal form. 64/25675 useless extension candidates. Maximal degree in co-relation 193430. Up to 18373 conditions per place. [2024-05-12 13:13:30,849 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 434 selfloop transitions, 389 changer transitions 0/833 dead transitions. [2024-05-12 13:13:30,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 833 transitions, 13792 flow [2024-05-12 13:13:30,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 13:13:30,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 13:13:30,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 298 transitions. [2024-05-12 13:13:30,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5418181818181819 [2024-05-12 13:13:30,851 INFO L175 Difference]: Start difference. First operand has 291 places, 614 transitions, 9609 flow. Second operand 11 states and 298 transitions. [2024-05-12 13:13:30,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 833 transitions, 13792 flow