./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe032_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/protection/safe032_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.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/safe032_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-05-07_14-17-48.files/protection/safe032_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.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 13:43:20,002 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 13:43:20,063 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 13:43:20,067 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 13:43:20,067 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 13:43:20,090 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 13:43:20,092 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 13:43:20,092 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 13:43:20,093 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 13:43:20,096 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 13:43:20,096 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 13:43:20,096 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 13:43:20,097 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 13:43:20,098 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 13:43:20,098 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 13:43:20,098 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 13:43:20,099 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 13:43:20,099 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 13:43:20,099 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 13:43:20,099 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 13:43:20,100 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 13:43:20,100 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 13:43:20,101 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 13:43:20,101 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 13:43:20,101 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 13:43:20,101 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 13:43:20,102 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 13:43:20,102 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 13:43:20,102 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 13:43:20,102 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 13:43:20,103 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 13:43:20,103 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 13:43:20,103 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 13:43:20,104 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 13:43:20,104 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 13:43:20,104 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 13:43:20,104 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 13:43:20,104 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 13:43:20,105 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 13:43:20,105 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 13:43:20,105 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 13:43:20,105 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 13:43:20,105 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 13:43:20,106 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 13:43:20,331 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 13:43:20,349 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 13:43:20,351 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 13:43:20,352 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 13:43:20,352 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 13:43:20,353 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe032_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-05-12 13:43:21,336 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 13:43:21,547 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 13:43:21,548 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe032_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-05-12 13:43:21,573 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e52e911ef/90cd01270af8478eabffc9703856ff99/FLAGb94c3858e [2024-05-12 13:43:21,584 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e52e911ef/90cd01270af8478eabffc9703856ff99 [2024-05-12 13:43:21,586 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 13:43:21,587 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 13:43:21,589 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/protection/safe032_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-05-12 13:43:21,720 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 13:43:21,722 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 13:43:21,724 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 13:43:21,724 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 13:43:21,728 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 13:43:21,729 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 01:43:21" (1/2) ... [2024-05-12 13:43:21,730 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5108e486 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:43:21, skipping insertion in model container [2024-05-12 13:43:21,730 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 01:43:21" (1/2) ... [2024-05-12 13:43:21,732 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@46a45794 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:43:21, skipping insertion in model container [2024-05-12 13:43:21,732 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 01:43:21" (2/2) ... [2024-05-12 13:43:21,732 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5108e486 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:43:21, skipping insertion in model container [2024-05-12 13:43:21,733 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 01:43:21" (2/2) ... [2024-05-12 13:43:21,733 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 13:43:21,825 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 13:43:21,826 INFO L97 edCorrectnessWitness]: Location invariant before [L852-L852] ((((((((((((((((! multithreaded || x$r_buff0_thd1 == (_Bool)0) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0) [2024-05-12 13:43:21,826 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] ((((((((((((((((! multithreaded || x$r_buff0_thd1 == (_Bool)0) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0) [2024-05-12 13:43:21,826 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] ((((((((((((((((! multithreaded || x$r_buff0_thd1 == (_Bool)0) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0) [2024-05-12 13:43:21,827 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 13:43:21,827 INFO L106 edCorrectnessWitness]: ghost_update [L850-L850] multithreaded = 1; [2024-05-12 13:43:21,860 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 13:43:22,030 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/safe032_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i[1039,1052] [2024-05-12 13:43:22,219 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 13:43:22,226 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-05-12 13:43:22,266 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/safe032_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i[1039,1052] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 13:43:22,360 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 13:43:22,401 INFO L206 MainTranslator]: Completed translation [2024-05-12 13:43:22,402 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:43:22 WrapperNode [2024-05-12 13:43:22,402 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 13:43:22,403 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 13:43:22,403 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 13:43:22,403 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 13:43:22,408 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 01:43:22" (1/1) ... [2024-05-12 13:43:22,437 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 01:43:22" (1/1) ... [2024-05-12 13:43:22,474 INFO L138 Inliner]: procedures = 176, calls = 58, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 149 [2024-05-12 13:43:22,475 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 13:43:22,477 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 13:43:22,477 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 13:43:22,477 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 13:43:22,487 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 01:43:22" (1/1) ... [2024-05-12 13:43:22,487 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 01:43:22" (1/1) ... [2024-05-12 13:43:22,496 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 01:43:22" (1/1) ... [2024-05-12 13:43:22,512 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 13:43:22,512 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 01:43:22" (1/1) ... [2024-05-12 13:43:22,512 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 01:43:22" (1/1) ... [2024-05-12 13:43:22,522 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 01:43:22" (1/1) ... [2024-05-12 13:43:22,524 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 01:43:22" (1/1) ... [2024-05-12 13:43:22,527 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 01:43:22" (1/1) ... [2024-05-12 13:43:22,532 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 01:43:22" (1/1) ... [2024-05-12 13:43:22,535 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 13:43:22,536 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 13:43:22,536 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 13:43:22,536 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 13:43:22,537 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 01:43:22" (1/1) ... [2024-05-12 13:43:22,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 13:43:22,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 13:43:22,594 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 13:43:22,642 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 13:43:22,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 13:43:22,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 13:43:22,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 13:43:22,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-05-12 13:43:22,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 13:43:22,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 13:43:22,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 13:43:22,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 13:43:22,654 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-05-12 13:43:22,654 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-05-12 13:43:22,655 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-05-12 13:43:22,655 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-05-12 13:43:22,655 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-05-12 13:43:22,655 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-05-12 13:43:22,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 13:43:22,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 13:43:22,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 13:43:22,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-05-12 13:43:22,657 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 13:43:22,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 13:43:22,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 13:43:22,658 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 13:43:22,790 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 13:43:22,792 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 13:43:23,158 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 13:43:23,158 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 13:43:23,317 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 13:43:23,318 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-05-12 13:43:23,319 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 01:43:23 BoogieIcfgContainer [2024-05-12 13:43:23,319 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 13:43:23,321 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 13:43:23,321 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 13:43:23,323 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 13:43:23,324 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 01:43:21" (1/4) ... [2024-05-12 13:43:23,324 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58f530eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 01:43:23, skipping insertion in model container [2024-05-12 13:43:23,324 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 01:43:21" (2/4) ... [2024-05-12 13:43:23,325 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58f530eb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 01:43:23, skipping insertion in model container [2024-05-12 13:43:23,325 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 01:43:22" (3/4) ... [2024-05-12 13:43:23,325 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58f530eb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 01:43:23, skipping insertion in model container [2024-05-12 13:43:23,325 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 01:43:23" (4/4) ... [2024-05-12 13:43:23,326 INFO L112 eAbstractionObserver]: Analyzing ICFG safe032_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-05-12 13:43:23,338 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 13:43:23,338 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-05-12 13:43:23,338 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 13:43:23,376 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-05-12 13:43:23,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 49 transitions, 110 flow [2024-05-12 13:43:23,458 INFO L124 PetriNetUnfolderBase]: 1/46 cut-off events. [2024-05-12 13:43:23,458 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 13:43:23,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 46 events. 1/46 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 80 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2024-05-12 13:43:23,461 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 49 transitions, 110 flow [2024-05-12 13:43:23,465 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 46 transitions, 101 flow [2024-05-12 13:43:23,475 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 13:43:23,481 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;@532bb016, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 13:43:23,481 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-05-12 13:43:23,485 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 13:43:23,486 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-05-12 13:43:23,486 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 13:43:23,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:43:23,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 13:43:23,487 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 13:43:23,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:43:23,492 INFO L85 PathProgramCache]: Analyzing trace with hash -244080951, now seen corresponding path program 1 times [2024-05-12 13:43:23,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:43:23,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098975816] [2024-05-12 13:43:23,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:43:23,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:43:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:43:24,628 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 13:43:24,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:43:24,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098975816] [2024-05-12 13:43:24,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098975816] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:43:24,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:43:24,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 13:43:24,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334201358] [2024-05-12 13:43:24,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:43:24,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 13:43:24,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:43:24,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 13:43:24,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 13:43:24,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:43:24,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 101 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 13:43:24,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:43:24,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:43:24,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:43:25,550 INFO L124 PetriNetUnfolderBase]: 4925/7801 cut-off events. [2024-05-12 13:43:25,550 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2024-05-12 13:43:25,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14933 conditions, 7801 events. 4925/7801 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 49919 event pairs, 4091 based on Foata normal form. 246/7480 useless extension candidates. Maximal degree in co-relation 14918. Up to 7030 conditions per place. [2024-05-12 13:43:25,645 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 46 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2024-05-12 13:43:25,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 61 transitions, 239 flow [2024-05-12 13:43:25,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 13:43:25,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 13:43:25,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-05-12 13:43:25,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6462585034013606 [2024-05-12 13:43:25,657 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 101 flow. Second operand 3 states and 95 transitions. [2024-05-12 13:43:25,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 61 transitions, 239 flow [2024-05-12 13:43:25,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 234 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 13:43:25,665 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 133 flow [2024-05-12 13:43:25,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-05-12 13:43:25,669 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 0 predicate places. [2024-05-12 13:43:25,669 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 133 flow [2024-05-12 13:43:25,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 13:43:25,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:43:25,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:43:25,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 13:43:25,670 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 13:43:25,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:43:25,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1661429544, now seen corresponding path program 1 times [2024-05-12 13:43:25,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:43:25,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819659534] [2024-05-12 13:43:25,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:43:25,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:43:25,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:43:26,324 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 13:43:26,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:43:26,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819659534] [2024-05-12 13:43:26,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819659534] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:43:26,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:43:26,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 13:43:26,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248617301] [2024-05-12 13:43:26,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:43:26,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 13:43:26,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:43:26,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 13:43:26,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 13:43:26,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:43:26,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 13:43:26,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:43:26,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:43:26,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:43:27,189 INFO L124 PetriNetUnfolderBase]: 4911/7785 cut-off events. [2024-05-12 13:43:27,190 INFO L125 PetriNetUnfolderBase]: For 1084/1084 co-relation queries the response was YES. [2024-05-12 13:43:27,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16479 conditions, 7785 events. 4911/7785 cut-off events. For 1084/1084 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 49858 event pairs, 3365 based on Foata normal form. 6/7268 useless extension candidates. Maximal degree in co-relation 16464. Up to 6960 conditions per place. [2024-05-12 13:43:27,232 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 59 selfloop transitions, 9 changer transitions 0/78 dead transitions. [2024-05-12 13:43:27,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 78 transitions, 341 flow [2024-05-12 13:43:27,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 13:43:27,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 13:43:27,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-05-12 13:43:27,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6275510204081632 [2024-05-12 13:43:27,238 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 133 flow. Second operand 4 states and 123 transitions. [2024-05-12 13:43:27,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 78 transitions, 341 flow [2024-05-12 13:43:27,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 78 transitions, 336 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 13:43:27,242 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 179 flow [2024-05-12 13:43:27,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-05-12 13:43:27,247 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 3 predicate places. [2024-05-12 13:43:27,247 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 179 flow [2024-05-12 13:43:27,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 13:43:27,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:43:27,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:43:27,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 13:43:27,248 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:43:27,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:43:27,248 INFO L85 PathProgramCache]: Analyzing trace with hash 238370794, now seen corresponding path program 1 times [2024-05-12 13:43:27,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:43:27,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663730760] [2024-05-12 13:43:27,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:43:27,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:43:27,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:43:28,186 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 13:43:28,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:43:28,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663730760] [2024-05-12 13:43:28,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663730760] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:43:28,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:43:28,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 13:43:28,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431859709] [2024-05-12 13:43:28,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:43:28,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 13:43:28,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:43:28,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 13:43:28,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-05-12 13:43:28,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:43:28,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 179 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 13:43:28,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:43:28,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:43:28,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:43:29,209 INFO L124 PetriNetUnfolderBase]: 5515/8631 cut-off events. [2024-05-12 13:43:29,210 INFO L125 PetriNetUnfolderBase]: For 2880/2880 co-relation queries the response was YES. [2024-05-12 13:43:29,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20050 conditions, 8631 events. 5515/8631 cut-off events. For 2880/2880 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 54799 event pairs, 3485 based on Foata normal form. 4/8079 useless extension candidates. Maximal degree in co-relation 20033. Up to 7827 conditions per place. [2024-05-12 13:43:29,243 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 60 selfloop transitions, 12 changer transitions 0/81 dead transitions. [2024-05-12 13:43:29,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 81 transitions, 412 flow [2024-05-12 13:43:29,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 13:43:29,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 13:43:29,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-05-12 13:43:29,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-05-12 13:43:29,245 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 179 flow. Second operand 5 states and 126 transitions. [2024-05-12 13:43:29,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 81 transitions, 412 flow [2024-05-12 13:43:29,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 81 transitions, 386 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-05-12 13:43:29,248 INFO L231 Difference]: Finished difference. Result has 62 places, 63 transitions, 258 flow [2024-05-12 13:43:29,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=258, PETRI_PLACES=62, PETRI_TRANSITIONS=63} [2024-05-12 13:43:29,249 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2024-05-12 13:43:29,249 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 63 transitions, 258 flow [2024-05-12 13:43:29,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 13:43:29,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:43:29,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:43:29,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 13:43:29,250 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 13:43:29,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:43:29,250 INFO L85 PathProgramCache]: Analyzing trace with hash 41812574, now seen corresponding path program 1 times [2024-05-12 13:43:29,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:43:29,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912076370] [2024-05-12 13:43:29,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:43:29,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:43:29,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:43:30,192 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 13:43:30,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:43:30,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912076370] [2024-05-12 13:43:30,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912076370] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:43:30,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:43:30,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 13:43:30,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956092964] [2024-05-12 13:43:30,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:43:30,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 13:43:30,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:43:30,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 13:43:30,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-05-12 13:43:30,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:43:30,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 258 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:43:30,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:43:30,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:43:30,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:43:31,228 INFO L124 PetriNetUnfolderBase]: 4822/7075 cut-off events. [2024-05-12 13:43:31,228 INFO L125 PetriNetUnfolderBase]: For 4671/4671 co-relation queries the response was YES. [2024-05-12 13:43:31,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18755 conditions, 7075 events. 4822/7075 cut-off events. For 4671/4671 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 41742 event pairs, 1418 based on Foata normal form. 6/6778 useless extension candidates. Maximal degree in co-relation 18735. Up to 6787 conditions per place. [2024-05-12 13:43:31,263 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 84 selfloop transitions, 16 changer transitions 0/110 dead transitions. [2024-05-12 13:43:31,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 110 transitions, 577 flow [2024-05-12 13:43:31,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:43:31,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:43:31,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-05-12 13:43:31,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-05-12 13:43:31,265 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 258 flow. Second operand 6 states and 176 transitions. [2024-05-12 13:43:31,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 110 transitions, 577 flow [2024-05-12 13:43:31,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 110 transitions, 565 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-05-12 13:43:31,269 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 308 flow [2024-05-12 13:43:31,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=308, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2024-05-12 13:43:31,270 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 12 predicate places. [2024-05-12 13:43:31,270 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 308 flow [2024-05-12 13:43:31,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:43:31,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:43:31,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:43:31,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 13:43:31,271 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 13:43:31,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:43:31,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1737068553, now seen corresponding path program 1 times [2024-05-12 13:43:31,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:43:31,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604707912] [2024-05-12 13:43:31,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:43:31,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:43:31,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:43:31,989 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 13:43:31,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:43:31,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604707912] [2024-05-12 13:43:31,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604707912] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:43:31,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:43:31,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:43:31,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090257392] [2024-05-12 13:43:31,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:43:31,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:43:31,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:43:31,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:43:31,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:43:32,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:43:32,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 308 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 13:43:32,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:43:32,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:43:32,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:43:33,078 INFO L124 PetriNetUnfolderBase]: 5481/8590 cut-off events. [2024-05-12 13:43:33,080 INFO L125 PetriNetUnfolderBase]: For 8592/8592 co-relation queries the response was YES. [2024-05-12 13:43:33,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23401 conditions, 8590 events. 5481/8590 cut-off events. For 8592/8592 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 55014 event pairs, 2399 based on Foata normal form. 4/8056 useless extension candidates. Maximal degree in co-relation 23378. Up to 7681 conditions per place. [2024-05-12 13:43:33,122 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 78 selfloop transitions, 23 changer transitions 0/110 dead transitions. [2024-05-12 13:43:33,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 110 transitions, 683 flow [2024-05-12 13:43:33,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:43:33,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:43:33,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-05-12 13:43:33,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5374149659863946 [2024-05-12 13:43:33,124 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 308 flow. Second operand 6 states and 158 transitions. [2024-05-12 13:43:33,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 110 transitions, 683 flow [2024-05-12 13:43:33,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 110 transitions, 637 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-05-12 13:43:33,129 INFO L231 Difference]: Finished difference. Result has 71 places, 78 transitions, 427 flow [2024-05-12 13:43:33,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=427, PETRI_PLACES=71, PETRI_TRANSITIONS=78} [2024-05-12 13:43:33,130 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 16 predicate places. [2024-05-12 13:43:33,130 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 78 transitions, 427 flow [2024-05-12 13:43:33,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 13:43:33,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:43:33,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:43:33,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 13:43:33,130 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:43:33,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:43:33,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1880609685, now seen corresponding path program 2 times [2024-05-12 13:43:33,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:43:33,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778330770] [2024-05-12 13:43:33,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:43:33,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:43:33,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:43:33,784 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 13:43:33,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:43:33,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778330770] [2024-05-12 13:43:33,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778330770] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:43:33,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:43:33,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:43:33,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977398492] [2024-05-12 13:43:33,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:43:33,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:43:33,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:43:33,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:43:33,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:43:33,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:43:33,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 78 transitions, 427 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 13:43:33,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:43:33,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:43:33,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:43:34,814 INFO L124 PetriNetUnfolderBase]: 5469/8564 cut-off events. [2024-05-12 13:43:34,815 INFO L125 PetriNetUnfolderBase]: For 12091/12091 co-relation queries the response was YES. [2024-05-12 13:43:34,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25094 conditions, 8564 events. 5469/8564 cut-off events. For 12091/12091 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 54877 event pairs, 2395 based on Foata normal form. 4/8031 useless extension candidates. Maximal degree in co-relation 25068. Up to 7671 conditions per place. [2024-05-12 13:43:34,856 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 72 selfloop transitions, 24 changer transitions 0/105 dead transitions. [2024-05-12 13:43:34,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 105 transitions, 686 flow [2024-05-12 13:43:34,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:43:34,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:43:34,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-05-12 13:43:34,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5136054421768708 [2024-05-12 13:43:34,858 INFO L175 Difference]: Start difference. First operand has 71 places, 78 transitions, 427 flow. Second operand 6 states and 151 transitions. [2024-05-12 13:43:34,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 105 transitions, 686 flow [2024-05-12 13:43:34,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 105 transitions, 624 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-05-12 13:43:34,878 INFO L231 Difference]: Finished difference. Result has 74 places, 79 transitions, 430 flow [2024-05-12 13:43:34,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=430, PETRI_PLACES=74, PETRI_TRANSITIONS=79} [2024-05-12 13:43:34,879 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 19 predicate places. [2024-05-12 13:43:34,879 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 79 transitions, 430 flow [2024-05-12 13:43:34,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 13:43:34,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:43:34,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:43:34,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 13:43:34,880 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 13:43:34,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:43:34,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1441094569, now seen corresponding path program 1 times [2024-05-12 13:43:34,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:43:34,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534999760] [2024-05-12 13:43:34,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:43:34,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:43:34,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:43:36,081 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 13:43:36,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:43:36,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534999760] [2024-05-12 13:43:36,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534999760] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:43:36,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:43:36,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:43:36,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761161790] [2024-05-12 13:43:36,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:43:36,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:43:36,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:43:36,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:43:36,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:43:36,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:43:36,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 79 transitions, 430 flow. Second operand has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:43:36,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:43:36,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:43:36,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:43:37,228 INFO L124 PetriNetUnfolderBase]: 5357/8407 cut-off events. [2024-05-12 13:43:37,228 INFO L125 PetriNetUnfolderBase]: For 12933/12933 co-relation queries the response was YES. [2024-05-12 13:43:37,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24482 conditions, 8407 events. 5357/8407 cut-off events. For 12933/12933 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 53781 event pairs, 2314 based on Foata normal form. 4/7914 useless extension candidates. Maximal degree in co-relation 24455. Up to 7551 conditions per place. [2024-05-12 13:43:37,268 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 91 selfloop transitions, 17 changer transitions 0/117 dead transitions. [2024-05-12 13:43:37,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 117 transitions, 759 flow [2024-05-12 13:43:37,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:43:37,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:43:37,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-05-12 13:43:37,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272108843537415 [2024-05-12 13:43:37,270 INFO L175 Difference]: Start difference. First operand has 74 places, 79 transitions, 430 flow. Second operand 6 states and 155 transitions. [2024-05-12 13:43:37,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 117 transitions, 759 flow [2024-05-12 13:43:37,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 117 transitions, 721 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-05-12 13:43:37,280 INFO L231 Difference]: Finished difference. Result has 78 places, 84 transitions, 492 flow [2024-05-12 13:43:37,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=492, PETRI_PLACES=78, PETRI_TRANSITIONS=84} [2024-05-12 13:43:37,281 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 23 predicate places. [2024-05-12 13:43:37,281 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 84 transitions, 492 flow [2024-05-12 13:43:37,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:43:37,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:43:37,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:43:37,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 13:43:37,282 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:43:37,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:43:37,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1172695089, now seen corresponding path program 1 times [2024-05-12 13:43:37,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:43:37,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775876197] [2024-05-12 13:43:37,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:43:37,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:43:37,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:43:37,352 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 13:43:37,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:43:37,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775876197] [2024-05-12 13:43:37,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775876197] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:43:37,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:43:37,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 13:43:37,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195474872] [2024-05-12 13:43:37,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:43:37,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 13:43:37,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:43:37,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 13:43:37,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 13:43:37,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 49 [2024-05-12 13:43:37,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 84 transitions, 492 flow. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 13:43:37,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:43:37,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 49 [2024-05-12 13:43:37,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:43:37,734 INFO L124 PetriNetUnfolderBase]: 1805/3458 cut-off events. [2024-05-12 13:43:37,735 INFO L125 PetriNetUnfolderBase]: For 12422/12546 co-relation queries the response was YES. [2024-05-12 13:43:37,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9561 conditions, 3458 events. 1805/3458 cut-off events. For 12422/12546 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 24967 event pairs, 664 based on Foata normal form. 203/3455 useless extension candidates. Maximal degree in co-relation 9531. Up to 2045 conditions per place. [2024-05-12 13:43:37,755 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 48 selfloop transitions, 13 changer transitions 0/92 dead transitions. [2024-05-12 13:43:37,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 92 transitions, 618 flow [2024-05-12 13:43:37,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 13:43:37,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 13:43:37,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2024-05-12 13:43:37,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7074829931972789 [2024-05-12 13:43:37,757 INFO L175 Difference]: Start difference. First operand has 78 places, 84 transitions, 492 flow. Second operand 3 states and 104 transitions. [2024-05-12 13:43:37,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 92 transitions, 618 flow [2024-05-12 13:43:37,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 92 transitions, 589 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-05-12 13:43:37,764 INFO L231 Difference]: Finished difference. Result has 77 places, 80 transitions, 457 flow [2024-05-12 13:43:37,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=457, PETRI_PLACES=77, PETRI_TRANSITIONS=80} [2024-05-12 13:43:37,765 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 22 predicate places. [2024-05-12 13:43:37,765 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 80 transitions, 457 flow [2024-05-12 13:43:37,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 13:43:37,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:43:37,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:43:37,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 13:43:37,766 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:43:37,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:43:37,766 INFO L85 PathProgramCache]: Analyzing trace with hash -212078006, now seen corresponding path program 1 times [2024-05-12 13:43:37,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:43:37,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034260004] [2024-05-12 13:43:37,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:43:37,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:43:37,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:43:38,642 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 13:43:38,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:43:38,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034260004] [2024-05-12 13:43:38,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034260004] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:43:38,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:43:38,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:43:38,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634879199] [2024-05-12 13:43:38,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:43:38,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:43:38,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:43:38,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:43:38,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:43:38,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:43:38,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 80 transitions, 457 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:43:38,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:43:38,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:43:38,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:43:39,890 INFO L124 PetriNetUnfolderBase]: 4873/7688 cut-off events. [2024-05-12 13:43:39,890 INFO L125 PetriNetUnfolderBase]: For 19217/19217 co-relation queries the response was YES. [2024-05-12 13:43:39,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23403 conditions, 7688 events. 4873/7688 cut-off events. For 19217/19217 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 48382 event pairs, 1964 based on Foata normal form. 4/7476 useless extension candidates. Maximal degree in co-relation 23373. Up to 6602 conditions per place. [2024-05-12 13:43:39,940 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 96 selfloop transitions, 34 changer transitions 5/144 dead transitions. [2024-05-12 13:43:39,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 144 transitions, 1003 flow [2024-05-12 13:43:39,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:43:39,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:43:39,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-05-12 13:43:39,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5539358600583091 [2024-05-12 13:43:39,941 INFO L175 Difference]: Start difference. First operand has 77 places, 80 transitions, 457 flow. Second operand 7 states and 190 transitions. [2024-05-12 13:43:39,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 144 transitions, 1003 flow [2024-05-12 13:43:39,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 144 transitions, 971 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 13:43:39,953 INFO L231 Difference]: Finished difference. Result has 83 places, 89 transitions, 608 flow [2024-05-12 13:43:39,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=608, PETRI_PLACES=83, PETRI_TRANSITIONS=89} [2024-05-12 13:43:39,954 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 28 predicate places. [2024-05-12 13:43:39,954 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 89 transitions, 608 flow [2024-05-12 13:43:39,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:43:39,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:43:39,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:43:39,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 13:43:39,955 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:43:39,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:43:39,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1395597741, now seen corresponding path program 1 times [2024-05-12 13:43:39,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:43:39,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724674179] [2024-05-12 13:43:39,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:43:39,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:43:39,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:43:40,648 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 13:43:40,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:43:40,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724674179] [2024-05-12 13:43:40,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724674179] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:43:40,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:43:40,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 13:43:40,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192334646] [2024-05-12 13:43:40,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:43:40,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 13:43:40,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:43:40,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 13:43:40,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 13:43:40,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:43:40,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 89 transitions, 608 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:43:40,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:43:40,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:43:40,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:43:41,433 INFO L124 PetriNetUnfolderBase]: 4337/6936 cut-off events. [2024-05-12 13:43:41,434 INFO L125 PetriNetUnfolderBase]: For 21443/21443 co-relation queries the response was YES. [2024-05-12 13:43:41,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22618 conditions, 6936 events. 4337/6936 cut-off events. For 21443/21443 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 43336 event pairs, 2028 based on Foata normal form. 1/6719 useless extension candidates. Maximal degree in co-relation 22585. Up to 6197 conditions per place. [2024-05-12 13:43:41,474 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 93 selfloop transitions, 9 changer transitions 0/111 dead transitions. [2024-05-12 13:43:41,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 111 transitions, 904 flow [2024-05-12 13:43:41,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 13:43:41,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 13:43:41,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-05-12 13:43:41,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47346938775510206 [2024-05-12 13:43:41,477 INFO L175 Difference]: Start difference. First operand has 83 places, 89 transitions, 608 flow. Second operand 5 states and 116 transitions. [2024-05-12 13:43:41,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 111 transitions, 904 flow [2024-05-12 13:43:41,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 111 transitions, 852 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-05-12 13:43:41,502 INFO L231 Difference]: Finished difference. Result has 85 places, 96 transitions, 655 flow [2024-05-12 13:43:41,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=559, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=655, PETRI_PLACES=85, PETRI_TRANSITIONS=96} [2024-05-12 13:43:41,503 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 30 predicate places. [2024-05-12 13:43:41,503 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 96 transitions, 655 flow [2024-05-12 13:43:41,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:43:41,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:43:41,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:43:41,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-05-12 13:43:41,504 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 13:43:41,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:43:41,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1675774188, now seen corresponding path program 2 times [2024-05-12 13:43:41,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:43:41,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042900811] [2024-05-12 13:43:41,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:43:41,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:43:41,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:43:42,345 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 13:43:42,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:43:42,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042900811] [2024-05-12 13:43:42,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042900811] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:43:42,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:43:42,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:43:42,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80829645] [2024-05-12 13:43:42,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:43:42,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:43:42,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:43:42,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:43:42,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:43:42,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:43:42,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 96 transitions, 655 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:43:42,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:43:42,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:43:42,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:43:43,372 INFO L124 PetriNetUnfolderBase]: 4337/6927 cut-off events. [2024-05-12 13:43:43,372 INFO L125 PetriNetUnfolderBase]: For 23156/23156 co-relation queries the response was YES. [2024-05-12 13:43:43,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23414 conditions, 6927 events. 4337/6927 cut-off events. For 23156/23156 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 43667 event pairs, 1844 based on Foata normal form. 4/6717 useless extension candidates. Maximal degree in co-relation 23379. Up to 6118 conditions per place. [2024-05-12 13:43:43,414 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 109 selfloop transitions, 24 changer transitions 0/142 dead transitions. [2024-05-12 13:43:43,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 142 transitions, 1062 flow [2024-05-12 13:43:43,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:43:43,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:43:43,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-05-12 13:43:43,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5160349854227405 [2024-05-12 13:43:43,415 INFO L175 Difference]: Start difference. First operand has 85 places, 96 transitions, 655 flow. Second operand 7 states and 177 transitions. [2024-05-12 13:43:43,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 142 transitions, 1062 flow [2024-05-12 13:43:43,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 142 transitions, 1017 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-05-12 13:43:43,433 INFO L231 Difference]: Finished difference. Result has 90 places, 100 transitions, 710 flow [2024-05-12 13:43:43,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=710, PETRI_PLACES=90, PETRI_TRANSITIONS=100} [2024-05-12 13:43:43,433 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 35 predicate places. [2024-05-12 13:43:43,433 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 100 transitions, 710 flow [2024-05-12 13:43:43,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:43:43,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:43:43,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:43:43,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-05-12 13:43:43,434 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 13:43:43,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:43:43,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1888577540, now seen corresponding path program 1 times [2024-05-12 13:43:43,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:43:43,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908618588] [2024-05-12 13:43:43,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:43:43,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:43:43,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:43:44,714 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 13:43:44,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:43:44,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908618588] [2024-05-12 13:43:44,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908618588] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:43:44,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:43:44,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:43:44,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703259082] [2024-05-12 13:43:44,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:43:44,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:43:44,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:43:44,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:43:44,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:43:44,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:43:44,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 100 transitions, 710 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 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 13:43:44,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:43:44,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:43:44,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:43:45,903 INFO L124 PetriNetUnfolderBase]: 4389/6960 cut-off events. [2024-05-12 13:43:45,903 INFO L125 PetriNetUnfolderBase]: For 25918/25918 co-relation queries the response was YES. [2024-05-12 13:43:45,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24119 conditions, 6960 events. 4389/6960 cut-off events. For 25918/25918 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 43449 event pairs, 1581 based on Foata normal form. 4/6763 useless extension candidates. Maximal degree in co-relation 24082. Up to 5987 conditions per place. [2024-05-12 13:43:45,956 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 114 selfloop transitions, 36 changer transitions 0/159 dead transitions. [2024-05-12 13:43:45,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 159 transitions, 1274 flow [2024-05-12 13:43:45,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:43:45,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:43:45,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-05-12 13:43:45,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5393586005830904 [2024-05-12 13:43:45,958 INFO L175 Difference]: Start difference. First operand has 90 places, 100 transitions, 710 flow. Second operand 7 states and 185 transitions. [2024-05-12 13:43:45,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 159 transitions, 1274 flow [2024-05-12 13:43:45,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 159 transitions, 1225 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-05-12 13:43:45,980 INFO L231 Difference]: Finished difference. Result has 94 places, 109 transitions, 868 flow [2024-05-12 13:43:45,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=868, PETRI_PLACES=94, PETRI_TRANSITIONS=109} [2024-05-12 13:43:45,981 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 39 predicate places. [2024-05-12 13:43:45,981 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 109 transitions, 868 flow [2024-05-12 13:43:45,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 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 13:43:45,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:43:45,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:43:45,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-05-12 13:43:45,982 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 13:43:45,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:43:45,982 INFO L85 PathProgramCache]: Analyzing trace with hash 915345610, now seen corresponding path program 3 times [2024-05-12 13:43:45,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:43:45,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327905755] [2024-05-12 13:43:45,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:43:45,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:43:45,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:43:46,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:43:46,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:43:46,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327905755] [2024-05-12 13:43:46,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327905755] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:43:46,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:43:46,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:43:46,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761355364] [2024-05-12 13:43:46,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:43:46,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:43:46,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:43:46,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:43:46,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:43:46,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:43:46,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 109 transitions, 868 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:43:46,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:43:46,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:43:46,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:43:47,986 INFO L124 PetriNetUnfolderBase]: 4379/6625 cut-off events. [2024-05-12 13:43:47,986 INFO L125 PetriNetUnfolderBase]: For 31253/31253 co-relation queries the response was YES. [2024-05-12 13:43:48,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25001 conditions, 6625 events. 4379/6625 cut-off events. For 31253/31253 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 39278 event pairs, 1523 based on Foata normal form. 4/6528 useless extension candidates. Maximal degree in co-relation 24961. Up to 5950 conditions per place. [2024-05-12 13:43:48,032 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 100 selfloop transitions, 43 changer transitions 0/152 dead transitions. [2024-05-12 13:43:48,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 152 transitions, 1285 flow [2024-05-12 13:43:48,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:43:48,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:43:48,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-05-12 13:43:48,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5160349854227405 [2024-05-12 13:43:48,034 INFO L175 Difference]: Start difference. First operand has 94 places, 109 transitions, 868 flow. Second operand 7 states and 177 transitions. [2024-05-12 13:43:48,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 152 transitions, 1285 flow [2024-05-12 13:43:48,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 152 transitions, 1223 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-05-12 13:43:48,076 INFO L231 Difference]: Finished difference. Result has 100 places, 111 transitions, 930 flow [2024-05-12 13:43:48,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=930, PETRI_PLACES=100, PETRI_TRANSITIONS=111} [2024-05-12 13:43:48,077 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 45 predicate places. [2024-05-12 13:43:48,077 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 111 transitions, 930 flow [2024-05-12 13:43:48,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:43:48,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:43:48,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:43:48,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-05-12 13:43:48,078 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 13:43:48,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:43:48,078 INFO L85 PathProgramCache]: Analyzing trace with hash 919745716, now seen corresponding path program 2 times [2024-05-12 13:43:48,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:43:48,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913432598] [2024-05-12 13:43:48,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:43:48,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:43:48,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:43:49,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:43:49,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:43:49,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913432598] [2024-05-12 13:43:49,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913432598] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:43:49,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:43:49,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:43:49,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949964012] [2024-05-12 13:43:49,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:43:49,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:43:49,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:43:49,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:43:49,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:43:49,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:43:49,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 111 transitions, 930 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 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 13:43:49,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:43:49,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:43:49,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:43:50,416 INFO L124 PetriNetUnfolderBase]: 4431/7099 cut-off events. [2024-05-12 13:43:50,417 INFO L125 PetriNetUnfolderBase]: For 33283/33283 co-relation queries the response was YES. [2024-05-12 13:43:50,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25896 conditions, 7099 events. 4431/7099 cut-off events. For 33283/33283 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 45000 event pairs, 1581 based on Foata normal form. 4/6879 useless extension candidates. Maximal degree in co-relation 25853. Up to 6017 conditions per place. [2024-05-12 13:43:50,465 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 110 selfloop transitions, 40 changer transitions 0/159 dead transitions. [2024-05-12 13:43:50,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 159 transitions, 1431 flow [2024-05-12 13:43:50,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:43:50,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:43:50,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-05-12 13:43:50,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5276967930029155 [2024-05-12 13:43:50,467 INFO L175 Difference]: Start difference. First operand has 100 places, 111 transitions, 930 flow. Second operand 7 states and 181 transitions. [2024-05-12 13:43:50,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 159 transitions, 1431 flow [2024-05-12 13:43:50,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 159 transitions, 1307 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-05-12 13:43:50,495 INFO L231 Difference]: Finished difference. Result has 101 places, 114 transitions, 930 flow [2024-05-12 13:43:50,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=930, PETRI_PLACES=101, PETRI_TRANSITIONS=114} [2024-05-12 13:43:50,496 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 46 predicate places. [2024-05-12 13:43:50,496 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 114 transitions, 930 flow [2024-05-12 13:43:50,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 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 13:43:50,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:43:50,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:43:50,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-05-12 13:43:50,497 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:43:50,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:43:50,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1912430792, now seen corresponding path program 3 times [2024-05-12 13:43:50,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:43:50,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059456581] [2024-05-12 13:43:50,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:43:50,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:43:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:43:51,559 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 13:43:51,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:43:51,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059456581] [2024-05-12 13:43:51,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059456581] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:43:51,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:43:51,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:43:51,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636463042] [2024-05-12 13:43:51,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:43:51,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:43:51,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:43:51,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:43:51,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:43:51,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:43:51,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 114 transitions, 930 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 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 13:43:51,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:43:51,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:43:51,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:43:52,751 INFO L124 PetriNetUnfolderBase]: 4421/7083 cut-off events. [2024-05-12 13:43:52,751 INFO L125 PetriNetUnfolderBase]: For 35301/35301 co-relation queries the response was YES. [2024-05-12 13:43:52,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25852 conditions, 7083 events. 4421/7083 cut-off events. For 35301/35301 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 44915 event pairs, 1591 based on Foata normal form. 4/6863 useless extension candidates. Maximal degree in co-relation 25809. Up to 6009 conditions per place. [2024-05-12 13:43:52,797 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 103 selfloop transitions, 42 changer transitions 0/154 dead transitions. [2024-05-12 13:43:52,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 154 transitions, 1326 flow [2024-05-12 13:43:52,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:43:52,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:43:52,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-05-12 13:43:52,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5131195335276968 [2024-05-12 13:43:52,799 INFO L175 Difference]: Start difference. First operand has 101 places, 114 transitions, 930 flow. Second operand 7 states and 176 transitions. [2024-05-12 13:43:52,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 154 transitions, 1326 flow [2024-05-12 13:43:52,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 154 transitions, 1204 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-05-12 13:43:52,826 INFO L231 Difference]: Finished difference. Result has 102 places, 114 transitions, 900 flow [2024-05-12 13:43:52,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=900, PETRI_PLACES=102, PETRI_TRANSITIONS=114} [2024-05-12 13:43:52,827 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 47 predicate places. [2024-05-12 13:43:52,827 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 114 transitions, 900 flow [2024-05-12 13:43:52,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 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 13:43:52,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:43:52,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:43:52,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-05-12 13:43:52,828 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 13:43:52,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:43:52,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1912441704, now seen corresponding path program 1 times [2024-05-12 13:43:52,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:43:52,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114457531] [2024-05-12 13:43:52,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:43:52,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:43:52,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:43:54,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:43:54,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:43:54,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114457531] [2024-05-12 13:43:54,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114457531] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:43:54,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:43:54,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:43:54,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413587587] [2024-05-12 13:43:54,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:43:54,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:43:54,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:43:54,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:43:54,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:43:54,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:43:54,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 114 transitions, 900 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 13:43:54,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:43:54,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:43:54,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:43:55,574 INFO L124 PetriNetUnfolderBase]: 4413/7066 cut-off events. [2024-05-12 13:43:55,574 INFO L125 PetriNetUnfolderBase]: For 36850/36850 co-relation queries the response was YES. [2024-05-12 13:43:55,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25756 conditions, 7066 events. 4413/7066 cut-off events. For 36850/36850 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 44548 event pairs, 1813 based on Foata normal form. 4/6848 useless extension candidates. Maximal degree in co-relation 25713. Up to 6194 conditions per place. [2024-05-12 13:43:55,618 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 124 selfloop transitions, 22 changer transitions 0/155 dead transitions. [2024-05-12 13:43:55,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 155 transitions, 1322 flow [2024-05-12 13:43:55,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:43:55,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:43:55,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-05-12 13:43:55,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5014577259475219 [2024-05-12 13:43:55,621 INFO L175 Difference]: Start difference. First operand has 102 places, 114 transitions, 900 flow. Second operand 7 states and 172 transitions. [2024-05-12 13:43:55,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 155 transitions, 1322 flow [2024-05-12 13:43:55,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 155 transitions, 1218 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-05-12 13:43:55,646 INFO L231 Difference]: Finished difference. Result has 102 places, 116 transitions, 879 flow [2024-05-12 13:43:55,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=796, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=879, PETRI_PLACES=102, PETRI_TRANSITIONS=116} [2024-05-12 13:43:55,647 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 47 predicate places. [2024-05-12 13:43:55,647 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 116 transitions, 879 flow [2024-05-12 13:43:55,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 13:43:55,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:43:55,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:43:55,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-05-12 13:43:55,648 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:43:55,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:43:55,648 INFO L85 PathProgramCache]: Analyzing trace with hash 313859220, now seen corresponding path program 1 times [2024-05-12 13:43:55,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:43:55,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974701989] [2024-05-12 13:43:55,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:43:55,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:43:55,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:43:56,300 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 13:43:56,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:43:56,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974701989] [2024-05-12 13:43:56,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974701989] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:43:56,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:43:56,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:43:56,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907964098] [2024-05-12 13:43:56,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:43:56,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:43:56,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:43:56,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:43:56,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:43:56,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:43:56,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 116 transitions, 879 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 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 13:43:56,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:43:56,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:43:56,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:43:57,299 INFO L124 PetriNetUnfolderBase]: 4524/6965 cut-off events. [2024-05-12 13:43:57,300 INFO L125 PetriNetUnfolderBase]: For 41858/41858 co-relation queries the response was YES. [2024-05-12 13:43:57,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26492 conditions, 6965 events. 4524/6965 cut-off events. For 41858/41858 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 42201 event pairs, 1997 based on Foata normal form. 3/6830 useless extension candidates. Maximal degree in co-relation 26449. Up to 6322 conditions per place. [2024-05-12 13:43:57,337 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 124 selfloop transitions, 19 changer transitions 0/152 dead transitions. [2024-05-12 13:43:57,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 152 transitions, 1359 flow [2024-05-12 13:43:57,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:43:57,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:43:57,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-05-12 13:43:57,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2024-05-12 13:43:57,339 INFO L175 Difference]: Start difference. First operand has 102 places, 116 transitions, 879 flow. Second operand 6 states and 144 transitions. [2024-05-12 13:43:57,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 152 transitions, 1359 flow [2024-05-12 13:43:57,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 152 transitions, 1296 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-05-12 13:43:57,362 INFO L231 Difference]: Finished difference. Result has 105 places, 128 transitions, 985 flow [2024-05-12 13:43:57,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=816, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=985, PETRI_PLACES=105, PETRI_TRANSITIONS=128} [2024-05-12 13:43:57,363 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 50 predicate places. [2024-05-12 13:43:57,363 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 128 transitions, 985 flow [2024-05-12 13:43:57,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 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 13:43:57,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:43:57,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:43:57,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-05-12 13:43:57,364 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:43:57,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:43:57,364 INFO L85 PathProgramCache]: Analyzing trace with hash -334937308, now seen corresponding path program 1 times [2024-05-12 13:43:57,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:43:57,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437232484] [2024-05-12 13:43:57,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:43:57,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:43:57,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:43:57,966 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 13:43:57,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:43:57,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437232484] [2024-05-12 13:43:57,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437232484] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:43:57,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:43:57,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:43:57,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334559146] [2024-05-12 13:43:57,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:43:57,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:43:57,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:43:57,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:43:57,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:43:57,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:43:57,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 128 transitions, 985 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 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 13:43:57,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:43:57,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:43:57,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:43:59,003 INFO L124 PetriNetUnfolderBase]: 4583/7074 cut-off events. [2024-05-12 13:43:59,003 INFO L125 PetriNetUnfolderBase]: For 48706/48706 co-relation queries the response was YES. [2024-05-12 13:43:59,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28794 conditions, 7074 events. 4583/7074 cut-off events. For 48706/48706 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 42943 event pairs, 2017 based on Foata normal form. 2/6935 useless extension candidates. Maximal degree in co-relation 28748. Up to 6494 conditions per place. [2024-05-12 13:43:59,038 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 138 selfloop transitions, 20 changer transitions 0/167 dead transitions. [2024-05-12 13:43:59,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 167 transitions, 1470 flow [2024-05-12 13:43:59,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:43:59,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:43:59,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-05-12 13:43:59,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48104956268221577 [2024-05-12 13:43:59,044 INFO L175 Difference]: Start difference. First operand has 105 places, 128 transitions, 985 flow. Second operand 7 states and 165 transitions. [2024-05-12 13:43:59,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 167 transitions, 1470 flow [2024-05-12 13:43:59,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 167 transitions, 1442 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-05-12 13:43:59,077 INFO L231 Difference]: Finished difference. Result has 112 places, 138 transitions, 1108 flow [2024-05-12 13:43:59,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=959, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1108, PETRI_PLACES=112, PETRI_TRANSITIONS=138} [2024-05-12 13:43:59,077 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 57 predicate places. [2024-05-12 13:43:59,077 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 138 transitions, 1108 flow [2024-05-12 13:43:59,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 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 13:43:59,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:43:59,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:43:59,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-05-12 13:43:59,078 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:43:59,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:43:59,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1139211374, now seen corresponding path program 2 times [2024-05-12 13:43:59,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:43:59,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067878051] [2024-05-12 13:43:59,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:43:59,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:43:59,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:43:59,705 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 13:43:59,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:43:59,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067878051] [2024-05-12 13:43:59,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067878051] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:43:59,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:43:59,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:43:59,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032722416] [2024-05-12 13:43:59,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:43:59,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:43:59,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:43:59,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:43:59,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:43:59,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:43:59,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 138 transitions, 1108 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 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 13:43:59,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:43:59,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:43:59,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:44:00,862 INFO L124 PetriNetUnfolderBase]: 4623/7142 cut-off events. [2024-05-12 13:44:00,862 INFO L125 PetriNetUnfolderBase]: For 52999/52999 co-relation queries the response was YES. [2024-05-12 13:44:00,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29661 conditions, 7142 events. 4623/7142 cut-off events. For 52999/52999 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 43467 event pairs, 2009 based on Foata normal form. 2/7001 useless extension candidates. Maximal degree in co-relation 29611. Up to 6525 conditions per place. [2024-05-12 13:44:00,903 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 136 selfloop transitions, 20 changer transitions 0/165 dead transitions. [2024-05-12 13:44:00,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 165 transitions, 1536 flow [2024-05-12 13:44:00,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:44:00,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:44:00,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-05-12 13:44:00,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-05-12 13:44:00,905 INFO L175 Difference]: Start difference. First operand has 112 places, 138 transitions, 1108 flow. Second operand 6 states and 142 transitions. [2024-05-12 13:44:00,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 165 transitions, 1536 flow [2024-05-12 13:44:00,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 165 transitions, 1487 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-05-12 13:44:00,965 INFO L231 Difference]: Finished difference. Result has 114 places, 141 transitions, 1149 flow [2024-05-12 13:44:00,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1059, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1149, PETRI_PLACES=114, PETRI_TRANSITIONS=141} [2024-05-12 13:44:00,966 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 59 predicate places. [2024-05-12 13:44:00,966 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 141 transitions, 1149 flow [2024-05-12 13:44:00,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 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 13:44:00,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:44:00,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:44:00,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-05-12 13:44:00,968 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 13:44:00,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:44:00,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1139686604, now seen corresponding path program 3 times [2024-05-12 13:44:00,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:44:00,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042896937] [2024-05-12 13:44:00,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:44:00,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:44:00,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:44:01,684 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 13:44:01,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:44:01,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042896937] [2024-05-12 13:44:01,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042896937] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:44:01,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:44:01,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:44:01,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468555225] [2024-05-12 13:44:01,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:44:01,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:44:01,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:44:01,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:44:01,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:44:01,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:44:01,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 141 transitions, 1149 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 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 13:44:01,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:44:01,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:44:01,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:44:02,717 INFO L124 PetriNetUnfolderBase]: 4607/7117 cut-off events. [2024-05-12 13:44:02,717 INFO L125 PetriNetUnfolderBase]: For 56201/56201 co-relation queries the response was YES. [2024-05-12 13:44:02,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29764 conditions, 7117 events. 4607/7117 cut-off events. For 56201/56201 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 43213 event pairs, 2007 based on Foata normal form. 4/6979 useless extension candidates. Maximal degree in co-relation 29714. Up to 6367 conditions per place. [2024-05-12 13:44:02,758 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 128 selfloop transitions, 27 changer transitions 0/164 dead transitions. [2024-05-12 13:44:02,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 164 transitions, 1547 flow [2024-05-12 13:44:02,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:44:02,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:44:02,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-05-12 13:44:02,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48639455782312924 [2024-05-12 13:44:02,760 INFO L175 Difference]: Start difference. First operand has 114 places, 141 transitions, 1149 flow. Second operand 6 states and 143 transitions. [2024-05-12 13:44:02,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 164 transitions, 1547 flow [2024-05-12 13:44:02,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 164 transitions, 1487 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-05-12 13:44:02,799 INFO L231 Difference]: Finished difference. Result has 116 places, 141 transitions, 1151 flow [2024-05-12 13:44:02,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1089, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1151, PETRI_PLACES=116, PETRI_TRANSITIONS=141} [2024-05-12 13:44:02,800 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 61 predicate places. [2024-05-12 13:44:02,800 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 141 transitions, 1151 flow [2024-05-12 13:44:02,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 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 13:44:02,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:44:02,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:44:02,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-05-12 13:44:02,801 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:44:02,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:44:02,801 INFO L85 PathProgramCache]: Analyzing trace with hash 446919428, now seen corresponding path program 1 times [2024-05-12 13:44:02,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:44:02,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751462272] [2024-05-12 13:44:02,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:44:02,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:44:02,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:44:03,495 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 13:44:03,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:44:03,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751462272] [2024-05-12 13:44:03,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751462272] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:44:03,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:44:03,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:44:03,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002888351] [2024-05-12 13:44:03,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:44:03,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:44:03,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:44:03,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:44:03,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:44:03,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:44:03,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 141 transitions, 1151 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 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 13:44:03,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:44:03,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:44:03,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:44:04,577 INFO L124 PetriNetUnfolderBase]: 4640/7159 cut-off events. [2024-05-12 13:44:04,577 INFO L125 PetriNetUnfolderBase]: For 55056/55056 co-relation queries the response was YES. [2024-05-12 13:44:04,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29917 conditions, 7159 events. 4640/7159 cut-off events. For 55056/55056 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 43397 event pairs, 1958 based on Foata normal form. 2/7018 useless extension candidates. Maximal degree in co-relation 29866. Up to 6569 conditions per place. [2024-05-12 13:44:04,627 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 141 selfloop transitions, 22 changer transitions 0/172 dead transitions. [2024-05-12 13:44:04,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 172 transitions, 1614 flow [2024-05-12 13:44:04,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:44:04,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:44:04,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-05-12 13:44:04,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-05-12 13:44:04,630 INFO L175 Difference]: Start difference. First operand has 116 places, 141 transitions, 1151 flow. Second operand 6 states and 142 transitions. [2024-05-12 13:44:04,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 172 transitions, 1614 flow [2024-05-12 13:44:04,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 172 transitions, 1540 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-05-12 13:44:04,693 INFO L231 Difference]: Finished difference. Result has 118 places, 150 transitions, 1214 flow [2024-05-12 13:44:04,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1077, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1214, PETRI_PLACES=118, PETRI_TRANSITIONS=150} [2024-05-12 13:44:04,693 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 63 predicate places. [2024-05-12 13:44:04,693 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 150 transitions, 1214 flow [2024-05-12 13:44:04,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 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 13:44:04,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:44:04,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:44:04,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-05-12 13:44:04,694 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:44:04,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:44:04,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1139693548, now seen corresponding path program 2 times [2024-05-12 13:44:04,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:44:04,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956644932] [2024-05-12 13:44:04,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:44:04,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:44:04,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:44:05,381 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 13:44:05,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:44:05,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956644932] [2024-05-12 13:44:05,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956644932] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:44:05,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:44:05,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:44:05,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819551765] [2024-05-12 13:44:05,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:44:05,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:44:05,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:44:05,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:44:05,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:44:05,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:44:05,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 150 transitions, 1214 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 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 13:44:05,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:44:05,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:44:05,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:44:06,410 INFO L124 PetriNetUnfolderBase]: 4655/7442 cut-off events. [2024-05-12 13:44:06,411 INFO L125 PetriNetUnfolderBase]: For 61550/61552 co-relation queries the response was YES. [2024-05-12 13:44:06,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31780 conditions, 7442 events. 4655/7442 cut-off events. For 61550/61552 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 46891 event pairs, 1928 based on Foata normal form. 2/7211 useless extension candidates. Maximal degree in co-relation 31727. Up to 6549 conditions per place. [2024-05-12 13:44:06,474 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 145 selfloop transitions, 30 changer transitions 0/184 dead transitions. [2024-05-12 13:44:06,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 184 transitions, 1799 flow [2024-05-12 13:44:06,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:44:06,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:44:06,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-05-12 13:44:06,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-05-12 13:44:06,476 INFO L175 Difference]: Start difference. First operand has 118 places, 150 transitions, 1214 flow. Second operand 6 states and 142 transitions. [2024-05-12 13:44:06,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 184 transitions, 1799 flow [2024-05-12 13:44:06,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 184 transitions, 1751 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-05-12 13:44:06,536 INFO L231 Difference]: Finished difference. Result has 123 places, 162 transitions, 1381 flow [2024-05-12 13:44:06,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1166, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1381, PETRI_PLACES=123, PETRI_TRANSITIONS=162} [2024-05-12 13:44:06,537 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 68 predicate places. [2024-05-12 13:44:06,537 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 162 transitions, 1381 flow [2024-05-12 13:44:06,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 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 13:44:06,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:44:06,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:44:06,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-05-12 13:44:06,538 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:44:06,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:44:06,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1139703468, now seen corresponding path program 1 times [2024-05-12 13:44:06,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:44:06,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443226211] [2024-05-12 13:44:06,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:44:06,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:44:06,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:44:07,566 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 13:44:07,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:44:07,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443226211] [2024-05-12 13:44:07,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443226211] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:44:07,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:44:07,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:44:07,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303698863] [2024-05-12 13:44:07,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:44:07,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:44:07,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:44:07,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:44:07,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:44:07,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:44:07,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 162 transitions, 1381 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:44:07,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:44:07,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:44:07,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:44:08,727 INFO L124 PetriNetUnfolderBase]: 4774/7633 cut-off events. [2024-05-12 13:44:08,727 INFO L125 PetriNetUnfolderBase]: For 71298/71300 co-relation queries the response was YES. [2024-05-12 13:44:08,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33935 conditions, 7633 events. 4774/7633 cut-off events. For 71298/71300 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 48155 event pairs, 1791 based on Foata normal form. 6/7403 useless extension candidates. Maximal degree in co-relation 33879. Up to 6269 conditions per place. [2024-05-12 13:44:08,777 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 152 selfloop transitions, 57 changer transitions 0/218 dead transitions. [2024-05-12 13:44:08,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 218 transitions, 2241 flow [2024-05-12 13:44:08,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:44:08,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:44:08,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-05-12 13:44:08,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49854227405247814 [2024-05-12 13:44:08,779 INFO L175 Difference]: Start difference. First operand has 123 places, 162 transitions, 1381 flow. Second operand 7 states and 171 transitions. [2024-05-12 13:44:08,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 218 transitions, 2241 flow [2024-05-12 13:44:08,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 218 transitions, 2184 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-05-12 13:44:08,836 INFO L231 Difference]: Finished difference. Result has 130 places, 184 transitions, 1724 flow [2024-05-12 13:44:08,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1324, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1724, PETRI_PLACES=130, PETRI_TRANSITIONS=184} [2024-05-12 13:44:08,836 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 75 predicate places. [2024-05-12 13:44:08,837 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 184 transitions, 1724 flow [2024-05-12 13:44:08,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:44:08,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:44:08,837 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 13:44:08,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-05-12 13:44:08,837 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 13:44:08,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:44:08,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1834866621, now seen corresponding path program 1 times [2024-05-12 13:44:08,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:44:08,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352360124] [2024-05-12 13:44:08,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:44:08,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:44:08,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:44:09,657 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 13:44:09,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:44:09,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352360124] [2024-05-12 13:44:09,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352360124] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:44:09,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:44:09,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:44:09,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382973372] [2024-05-12 13:44:09,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:44:09,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:44:09,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:44:09,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:44:09,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:44:09,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:44:09,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 184 transitions, 1724 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 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 13:44:09,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:44:09,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:44:09,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:44:10,994 INFO L124 PetriNetUnfolderBase]: 4966/7872 cut-off events. [2024-05-12 13:44:10,995 INFO L125 PetriNetUnfolderBase]: For 87443/87443 co-relation queries the response was YES. [2024-05-12 13:44:11,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38343 conditions, 7872 events. 4966/7872 cut-off events. For 87443/87443 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 49352 event pairs, 1451 based on Foata normal form. 8/7653 useless extension candidates. Maximal degree in co-relation 38283. Up to 6730 conditions per place. [2024-05-12 13:44:11,068 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 207 selfloop transitions, 38 changer transitions 0/254 dead transitions. [2024-05-12 13:44:11,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 254 transitions, 2594 flow [2024-05-12 13:44:11,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:44:11,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:44:11,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-05-12 13:44:11,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5215419501133787 [2024-05-12 13:44:11,070 INFO L175 Difference]: Start difference. First operand has 130 places, 184 transitions, 1724 flow. Second operand 9 states and 230 transitions. [2024-05-12 13:44:11,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 254 transitions, 2594 flow [2024-05-12 13:44:11,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 254 transitions, 2484 flow, removed 42 selfloop flow, removed 2 redundant places. [2024-05-12 13:44:11,169 INFO L231 Difference]: Finished difference. Result has 138 places, 192 transitions, 1817 flow [2024-05-12 13:44:11,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1614, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1817, PETRI_PLACES=138, PETRI_TRANSITIONS=192} [2024-05-12 13:44:11,170 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 83 predicate places. [2024-05-12 13:44:11,170 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 192 transitions, 1817 flow [2024-05-12 13:44:11,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 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 13:44:11,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:44:11,171 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 13:44:11,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-05-12 13:44:11,171 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 13:44:11,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:44:11,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1948540887, now seen corresponding path program 2 times [2024-05-12 13:44:11,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:44:11,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087987720] [2024-05-12 13:44:11,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:44:11,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:44:11,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:44:12,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:44:12,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:44:12,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087987720] [2024-05-12 13:44:12,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087987720] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:44:12,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:44:12,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:44:12,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28242128] [2024-05-12 13:44:12,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:44:12,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:44:12,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:44:12,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:44:12,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:44:12,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:44:12,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 192 transitions, 1817 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 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 13:44:12,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:44:12,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:44:12,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:44:13,495 INFO L124 PetriNetUnfolderBase]: 4950/7866 cut-off events. [2024-05-12 13:44:13,495 INFO L125 PetriNetUnfolderBase]: For 92582/92582 co-relation queries the response was YES. [2024-05-12 13:44:13,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38871 conditions, 7866 events. 4950/7866 cut-off events. For 92582/92582 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 49429 event pairs, 1817 based on Foata normal form. 8/7641 useless extension candidates. Maximal degree in co-relation 38808. Up to 6862 conditions per place. [2024-05-12 13:44:13,569 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 201 selfloop transitions, 33 changer transitions 0/243 dead transitions. [2024-05-12 13:44:13,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 243 transitions, 2476 flow [2024-05-12 13:44:13,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:44:13,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:44:13,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-05-12 13:44:13,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5153061224489796 [2024-05-12 13:44:13,571 INFO L175 Difference]: Start difference. First operand has 138 places, 192 transitions, 1817 flow. Second operand 8 states and 202 transitions. [2024-05-12 13:44:13,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 243 transitions, 2476 flow [2024-05-12 13:44:13,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 243 transitions, 2349 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-05-12 13:44:13,686 INFO L231 Difference]: Finished difference. Result has 141 places, 193 transitions, 1781 flow [2024-05-12 13:44:13,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1700, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1781, PETRI_PLACES=141, PETRI_TRANSITIONS=193} [2024-05-12 13:44:13,686 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 86 predicate places. [2024-05-12 13:44:13,686 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 193 transitions, 1781 flow [2024-05-12 13:44:13,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 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 13:44:13,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:44:13,687 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 13:44:13,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-05-12 13:44:13,687 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:44:13,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:44:13,688 INFO L85 PathProgramCache]: Analyzing trace with hash -2058763801, now seen corresponding path program 1 times [2024-05-12 13:44:13,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:44:13,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835251152] [2024-05-12 13:44:13,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:44:13,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:44:13,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:44:14,868 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 13:44:14,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:44:14,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835251152] [2024-05-12 13:44:14,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835251152] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:44:14,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:44:14,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:44:14,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487281797] [2024-05-12 13:44:14,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:44:14,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:44:14,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:44:14,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:44:14,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:44:14,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:44:14,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 193 transitions, 1781 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 13:44:14,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:44:14,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:44:14,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:44:16,230 INFO L124 PetriNetUnfolderBase]: 5002/7962 cut-off events. [2024-05-12 13:44:16,230 INFO L125 PetriNetUnfolderBase]: For 94741/94741 co-relation queries the response was YES. [2024-05-12 13:44:16,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38947 conditions, 7962 events. 5002/7962 cut-off events. For 94741/94741 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 50198 event pairs, 1834 based on Foata normal form. 4/7725 useless extension candidates. Maximal degree in co-relation 38882. Up to 6980 conditions per place. [2024-05-12 13:44:16,301 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 202 selfloop transitions, 35 changer transitions 0/246 dead transitions. [2024-05-12 13:44:16,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 246 transitions, 2479 flow [2024-05-12 13:44:16,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:44:16,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:44:16,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-05-12 13:44:16,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5153061224489796 [2024-05-12 13:44:16,303 INFO L175 Difference]: Start difference. First operand has 141 places, 193 transitions, 1781 flow. Second operand 8 states and 202 transitions. [2024-05-12 13:44:16,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 246 transitions, 2479 flow [2024-05-12 13:44:16,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 246 transitions, 2415 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-05-12 13:44:16,392 INFO L231 Difference]: Finished difference. Result has 143 places, 196 transitions, 1838 flow [2024-05-12 13:44:16,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1717, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1838, PETRI_PLACES=143, PETRI_TRANSITIONS=196} [2024-05-12 13:44:16,393 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 88 predicate places. [2024-05-12 13:44:16,393 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 196 transitions, 1838 flow [2024-05-12 13:44:16,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 13:44:16,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:44:16,393 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 13:44:16,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-05-12 13:44:16,393 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 13:44:16,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:44:16,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1943477591, now seen corresponding path program 3 times [2024-05-12 13:44:16,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:44:16,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194269492] [2024-05-12 13:44:16,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:44:16,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:44:16,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:44:17,216 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 13:44:17,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:44:17,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194269492] [2024-05-12 13:44:17,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194269492] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:44:17,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:44:17,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:44:17,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874732697] [2024-05-12 13:44:17,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:44:17,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:44:17,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:44:17,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:44:17,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:44:17,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:44:17,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 196 transitions, 1838 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 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 13:44:17,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:44:17,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:44:17,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:44:18,662 INFO L124 PetriNetUnfolderBase]: 5086/8074 cut-off events. [2024-05-12 13:44:18,662 INFO L125 PetriNetUnfolderBase]: For 104749/104751 co-relation queries the response was YES. [2024-05-12 13:44:18,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40659 conditions, 8074 events. 5086/8074 cut-off events. For 104749/104751 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 50736 event pairs, 1664 based on Foata normal form. 8/7849 useless extension candidates. Maximal degree in co-relation 40593. Up to 6818 conditions per place. [2024-05-12 13:44:18,742 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 193 selfloop transitions, 51 changer transitions 0/253 dead transitions. [2024-05-12 13:44:18,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 253 transitions, 2596 flow [2024-05-12 13:44:18,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:44:18,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:44:18,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-05-12 13:44:18,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5255102040816326 [2024-05-12 13:44:18,746 INFO L175 Difference]: Start difference. First operand has 143 places, 196 transitions, 1838 flow. Second operand 8 states and 206 transitions. [2024-05-12 13:44:18,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 253 transitions, 2596 flow [2024-05-12 13:44:18,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 253 transitions, 2475 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-05-12 13:44:18,871 INFO L231 Difference]: Finished difference. Result has 144 places, 198 transitions, 1870 flow [2024-05-12 13:44:18,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1717, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1870, PETRI_PLACES=144, PETRI_TRANSITIONS=198} [2024-05-12 13:44:18,872 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 89 predicate places. [2024-05-12 13:44:18,872 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 198 transitions, 1870 flow [2024-05-12 13:44:18,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 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 13:44:18,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:44:18,872 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 13:44:18,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-05-12 13:44:18,872 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 13:44:18,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:44:18,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1771404407, now seen corresponding path program 2 times [2024-05-12 13:44:18,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:44:18,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576469747] [2024-05-12 13:44:18,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:44:18,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:44:18,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:44:20,308 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 13:44:20,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:44:20,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576469747] [2024-05-12 13:44:20,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576469747] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:44:20,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:44:20,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:44:20,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719241563] [2024-05-12 13:44:20,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:44:20,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:44:20,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:44:20,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:44:20,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:44:20,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:44:20,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 198 transitions, 1870 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 13:44:20,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:44:20,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:44:20,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:44:21,921 INFO L124 PetriNetUnfolderBase]: 5200/8255 cut-off events. [2024-05-12 13:44:21,921 INFO L125 PetriNetUnfolderBase]: For 114837/114839 co-relation queries the response was YES. [2024-05-12 13:44:21,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42249 conditions, 8255 events. 5200/8255 cut-off events. For 114837/114839 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 52065 event pairs, 1522 based on Foata normal form. 4/8025 useless extension candidates. Maximal degree in co-relation 42183. Up to 6694 conditions per place. [2024-05-12 13:44:22,000 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 200 selfloop transitions, 62 changer transitions 0/271 dead transitions. [2024-05-12 13:44:22,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 271 transitions, 2972 flow [2024-05-12 13:44:22,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:44:22,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:44:22,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-05-12 13:44:22,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5561224489795918 [2024-05-12 13:44:22,002 INFO L175 Difference]: Start difference. First operand has 144 places, 198 transitions, 1870 flow. Second operand 8 states and 218 transitions. [2024-05-12 13:44:22,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 271 transitions, 2972 flow [2024-05-12 13:44:22,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 271 transitions, 2847 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-05-12 13:44:22,153 INFO L231 Difference]: Finished difference. Result has 146 places, 207 transitions, 2015 flow [2024-05-12 13:44:22,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1745, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2015, PETRI_PLACES=146, PETRI_TRANSITIONS=207} [2024-05-12 13:44:22,158 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 91 predicate places. [2024-05-12 13:44:22,158 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 207 transitions, 2015 flow [2024-05-12 13:44:22,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 13:44:22,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:44:22,159 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 13:44:22,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-05-12 13:44:22,159 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 13:44:22,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:44:22,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1771167257, now seen corresponding path program 3 times [2024-05-12 13:44:22,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:44:22,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635545927] [2024-05-12 13:44:22,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:44:22,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:44:22,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:44:23,447 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 13:44:23,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:44:23,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635545927] [2024-05-12 13:44:23,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635545927] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:44:23,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:44:23,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:44:23,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065707731] [2024-05-12 13:44:23,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:44:23,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:44:23,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:44:23,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:44:23,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:44:23,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:44:23,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 207 transitions, 2015 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 13:44:23,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:44:23,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:44:23,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:44:25,005 INFO L124 PetriNetUnfolderBase]: 5190/8248 cut-off events. [2024-05-12 13:44:25,006 INFO L125 PetriNetUnfolderBase]: For 120542/120544 co-relation queries the response was YES. [2024-05-12 13:44:25,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42904 conditions, 8248 events. 5190/8248 cut-off events. For 120542/120544 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 52089 event pairs, 1509 based on Foata normal form. 4/8019 useless extension candidates. Maximal degree in co-relation 42837. Up to 6686 conditions per place. [2024-05-12 13:44:25,079 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 194 selfloop transitions, 64 changer transitions 0/267 dead transitions. [2024-05-12 13:44:25,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 267 transitions, 2885 flow [2024-05-12 13:44:25,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:44:25,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:44:25,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-05-12 13:44:25,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5433673469387755 [2024-05-12 13:44:25,081 INFO L175 Difference]: Start difference. First operand has 146 places, 207 transitions, 2015 flow. Second operand 8 states and 213 transitions. [2024-05-12 13:44:25,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 267 transitions, 2885 flow [2024-05-12 13:44:25,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 267 transitions, 2778 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-05-12 13:44:25,227 INFO L231 Difference]: Finished difference. Result has 151 places, 207 transitions, 2044 flow [2024-05-12 13:44:25,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1908, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2044, PETRI_PLACES=151, PETRI_TRANSITIONS=207} [2024-05-12 13:44:25,228 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 96 predicate places. [2024-05-12 13:44:25,229 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 207 transitions, 2044 flow [2024-05-12 13:44:25,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 13:44:25,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:44:25,229 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 13:44:25,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-05-12 13:44:25,229 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 13:44:25,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:44:25,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1730286347, now seen corresponding path program 1 times [2024-05-12 13:44:25,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:44:25,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861697740] [2024-05-12 13:44:25,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:44:25,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:44:25,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:44:26,875 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 13:44:26,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:44:26,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861697740] [2024-05-12 13:44:26,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861697740] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:44:26,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:44:26,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:44:26,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442424406] [2024-05-12 13:44:26,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:44:26,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:44:26,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:44:26,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:44:26,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:44:26,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:44:26,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 207 transitions, 2044 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 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 13:44:26,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:44:26,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:44:26,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:44:28,371 INFO L124 PetriNetUnfolderBase]: 5232/8357 cut-off events. [2024-05-12 13:44:28,372 INFO L125 PetriNetUnfolderBase]: For 126229/126231 co-relation queries the response was YES. [2024-05-12 13:44:28,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43685 conditions, 8357 events. 5232/8357 cut-off events. For 126229/126231 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 53239 event pairs, 1667 based on Foata normal form. 4/8110 useless extension candidates. Maximal degree in co-relation 43616. Up to 7091 conditions per place. [2024-05-12 13:44:28,451 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 206 selfloop transitions, 50 changer transitions 0/265 dead transitions. [2024-05-12 13:44:28,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 265 transitions, 2834 flow [2024-05-12 13:44:28,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:44:28,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:44:28,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-05-12 13:44:28,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5280612244897959 [2024-05-12 13:44:28,453 INFO L175 Difference]: Start difference. First operand has 151 places, 207 transitions, 2044 flow. Second operand 8 states and 207 transitions. [2024-05-12 13:44:28,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 265 transitions, 2834 flow [2024-05-12 13:44:28,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 265 transitions, 2697 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-05-12 13:44:28,601 INFO L231 Difference]: Finished difference. Result has 152 places, 209 transitions, 2056 flow [2024-05-12 13:44:28,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1907, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2056, PETRI_PLACES=152, PETRI_TRANSITIONS=209} [2024-05-12 13:44:28,602 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 97 predicate places. [2024-05-12 13:44:28,602 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 209 transitions, 2056 flow [2024-05-12 13:44:28,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 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 13:44:28,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:44:28,603 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 13:44:28,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-05-12 13:44:28,603 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:44:28,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:44:28,603 INFO L85 PathProgramCache]: Analyzing trace with hash -821141207, now seen corresponding path program 4 times [2024-05-12 13:44:28,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:44:28,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819668871] [2024-05-12 13:44:28,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:44:28,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:44:28,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:44:29,455 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 13:44:29,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:44:29,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819668871] [2024-05-12 13:44:29,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819668871] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:44:29,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:44:29,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:44:29,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294388226] [2024-05-12 13:44:29,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:44:29,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:44:29,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:44:29,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:44:29,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:44:29,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:44:29,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 209 transitions, 2056 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 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 13:44:29,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:44:29,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:44:29,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:44:31,016 INFO L124 PetriNetUnfolderBase]: 5232/8320 cut-off events. [2024-05-12 13:44:31,016 INFO L125 PetriNetUnfolderBase]: For 132554/132554 co-relation queries the response was YES. [2024-05-12 13:44:31,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43891 conditions, 8320 events. 5232/8320 cut-off events. For 132554/132554 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 52686 event pairs, 1688 based on Foata normal form. 8/8080 useless extension candidates. Maximal degree in co-relation 43821. Up to 7024 conditions per place. [2024-05-12 13:44:31,108 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 203 selfloop transitions, 51 changer transitions 0/263 dead transitions. [2024-05-12 13:44:31,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 263 transitions, 2844 flow [2024-05-12 13:44:31,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:44:31,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:44:31,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-05-12 13:44:31,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5153061224489796 [2024-05-12 13:44:31,109 INFO L175 Difference]: Start difference. First operand has 152 places, 209 transitions, 2056 flow. Second operand 8 states and 202 transitions. [2024-05-12 13:44:31,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 263 transitions, 2844 flow [2024-05-12 13:44:31,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 263 transitions, 2719 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-05-12 13:44:31,279 INFO L231 Difference]: Finished difference. Result has 154 places, 211 transitions, 2092 flow [2024-05-12 13:44:31,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1931, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2092, PETRI_PLACES=154, PETRI_TRANSITIONS=211} [2024-05-12 13:44:31,279 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 99 predicate places. [2024-05-12 13:44:31,280 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 211 transitions, 2092 flow [2024-05-12 13:44:31,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 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 13:44:31,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:44:31,280 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 13:44:31,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-05-12 13:44:31,280 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:44:31,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:44:31,281 INFO L85 PathProgramCache]: Analyzing trace with hash -685327317, now seen corresponding path program 4 times [2024-05-12 13:44:31,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:44:31,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521445682] [2024-05-12 13:44:31,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:44:31,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:44:31,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:44:32,460 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 13:44:32,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:44:32,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521445682] [2024-05-12 13:44:32,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521445682] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:44:32,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:44:32,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:44:32,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027744681] [2024-05-12 13:44:32,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:44:32,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:44:32,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:44:32,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:44:32,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:44:32,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:44:32,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 211 transitions, 2092 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 13:44:32,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:44:32,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:44:32,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:44:33,985 INFO L124 PetriNetUnfolderBase]: 5284/8412 cut-off events. [2024-05-12 13:44:33,985 INFO L125 PetriNetUnfolderBase]: For 140095/140095 co-relation queries the response was YES. [2024-05-12 13:44:34,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44711 conditions, 8412 events. 5284/8412 cut-off events. For 140095/140095 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 53439 event pairs, 1527 based on Foata normal form. 4/8170 useless extension candidates. Maximal degree in co-relation 44640. Up to 6792 conditions per place. [2024-05-12 13:44:34,058 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 196 selfloop transitions, 66 changer transitions 0/271 dead transitions. [2024-05-12 13:44:34,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 271 transitions, 3020 flow [2024-05-12 13:44:34,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:44:34,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:44:34,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-05-12 13:44:34,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-05-12 13:44:34,059 INFO L175 Difference]: Start difference. First operand has 154 places, 211 transitions, 2092 flow. Second operand 8 states and 210 transitions. [2024-05-12 13:44:34,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 271 transitions, 3020 flow [2024-05-12 13:44:34,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 271 transitions, 2887 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-05-12 13:44:34,201 INFO L231 Difference]: Finished difference. Result has 156 places, 214 transitions, 2147 flow [2024-05-12 13:44:34,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1959, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2147, PETRI_PLACES=156, PETRI_TRANSITIONS=214} [2024-05-12 13:44:34,201 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 101 predicate places. [2024-05-12 13:44:34,201 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 214 transitions, 2147 flow [2024-05-12 13:44:34,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 13:44:34,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:44:34,202 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 13:44:34,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-05-12 13:44:34,202 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:44:34,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:44:34,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1462572573, now seen corresponding path program 5 times [2024-05-12 13:44:34,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:44:34,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224907464] [2024-05-12 13:44:34,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:44:34,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:44:34,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:44:35,437 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 13:44:35,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:44:35,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224907464] [2024-05-12 13:44:35,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224907464] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:44:35,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:44:35,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:44:35,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443874671] [2024-05-12 13:44:35,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:44:35,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:44:35,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:44:35,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:44:35,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:44:35,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:44:35,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 214 transitions, 2147 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 13:44:35,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:44:35,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:44:35,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:44:37,111 INFO L124 PetriNetUnfolderBase]: 5336/8482 cut-off events. [2024-05-12 13:44:37,111 INFO L125 PetriNetUnfolderBase]: For 144818/144818 co-relation queries the response was YES. [2024-05-12 13:44:37,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45337 conditions, 8482 events. 5336/8482 cut-off events. For 144818/144818 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 53912 event pairs, 1546 based on Foata normal form. 4/8241 useless extension candidates. Maximal degree in co-relation 45265. Up to 6836 conditions per place. [2024-05-12 13:44:37,203 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 190 selfloop transitions, 72 changer transitions 0/271 dead transitions. [2024-05-12 13:44:37,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 271 transitions, 3075 flow [2024-05-12 13:44:37,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:44:37,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:44:37,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-05-12 13:44:37,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5255102040816326 [2024-05-12 13:44:37,211 INFO L175 Difference]: Start difference. First operand has 156 places, 214 transitions, 2147 flow. Second operand 8 states and 206 transitions. [2024-05-12 13:44:37,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 271 transitions, 3075 flow [2024-05-12 13:44:37,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 271 transitions, 2869 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-05-12 13:44:37,388 INFO L231 Difference]: Finished difference. Result has 158 places, 217 transitions, 2147 flow [2024-05-12 13:44:37,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1955, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2147, PETRI_PLACES=158, PETRI_TRANSITIONS=217} [2024-05-12 13:44:37,389 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 103 predicate places. [2024-05-12 13:44:37,389 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 217 transitions, 2147 flow [2024-05-12 13:44:37,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 13:44:37,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:44:37,389 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 13:44:37,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-05-12 13:44:37,389 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 13:44:37,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:44:37,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1109253661, now seen corresponding path program 6 times [2024-05-12 13:44:37,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:44:37,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976323406] [2024-05-12 13:44:37,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:44:37,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:44:37,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:44:38,712 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 13:44:38,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:44:38,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976323406] [2024-05-12 13:44:38,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976323406] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:44:38,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:44:38,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:44:38,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979397895] [2024-05-12 13:44:38,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:44:38,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:44:38,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:44:38,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:44:38,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:44:38,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:44:38,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 217 transitions, 2147 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 13:44:38,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:44:38,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:44:38,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:44:40,385 INFO L124 PetriNetUnfolderBase]: 5326/8470 cut-off events. [2024-05-12 13:44:40,385 INFO L125 PetriNetUnfolderBase]: For 146670/146670 co-relation queries the response was YES. [2024-05-12 13:44:40,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45026 conditions, 8470 events. 5326/8470 cut-off events. For 146670/146670 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 53790 event pairs, 1542 based on Foata normal form. 4/8229 useless extension candidates. Maximal degree in co-relation 44953. Up to 6828 conditions per place. [2024-05-12 13:44:40,464 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 194 selfloop transitions, 68 changer transitions 0/271 dead transitions. [2024-05-12 13:44:40,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 271 transitions, 2917 flow [2024-05-12 13:44:40,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:44:40,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:44:40,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-05-12 13:44:40,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5306122448979592 [2024-05-12 13:44:40,466 INFO L175 Difference]: Start difference. First operand has 158 places, 217 transitions, 2147 flow. Second operand 8 states and 208 transitions. [2024-05-12 13:44:40,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 271 transitions, 2917 flow [2024-05-12 13:44:40,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 271 transitions, 2757 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-05-12 13:44:40,672 INFO L231 Difference]: Finished difference. Result has 161 places, 217 transitions, 2131 flow [2024-05-12 13:44:40,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1987, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2131, PETRI_PLACES=161, PETRI_TRANSITIONS=217} [2024-05-12 13:44:40,672 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 106 predicate places. [2024-05-12 13:44:40,673 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 217 transitions, 2131 flow [2024-05-12 13:44:40,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 13:44:40,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:44:40,673 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 13:44:40,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-05-12 13:44:40,673 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:44:40,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:44:40,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1109244733, now seen corresponding path program 2 times [2024-05-12 13:44:40,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:44:40,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387937079] [2024-05-12 13:44:40,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:44:40,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:44:40,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:44:42,164 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 13:44:42,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:44:42,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387937079] [2024-05-12 13:44:42,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387937079] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:44:42,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:44:42,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:44:42,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271095683] [2024-05-12 13:44:42,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:44:42,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:44:42,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:44:42,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:44:42,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:44:42,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:44:42,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 217 transitions, 2131 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 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 13:44:42,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:44:42,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:44:42,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:44:43,889 INFO L124 PetriNetUnfolderBase]: 5368/8603 cut-off events. [2024-05-12 13:44:43,889 INFO L125 PetriNetUnfolderBase]: For 153455/153455 co-relation queries the response was YES. [2024-05-12 13:44:43,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45476 conditions, 8603 events. 5368/8603 cut-off events. For 153455/153455 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 55185 event pairs, 1664 based on Foata normal form. 4/8343 useless extension candidates. Maximal degree in co-relation 45402. Up to 7283 conditions per place. [2024-05-12 13:44:44,219 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 212 selfloop transitions, 50 changer transitions 0/271 dead transitions. [2024-05-12 13:44:44,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 271 transitions, 2921 flow [2024-05-12 13:44:44,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:44:44,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:44:44,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-05-12 13:44:44,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-05-12 13:44:44,221 INFO L175 Difference]: Start difference. First operand has 161 places, 217 transitions, 2131 flow. Second operand 8 states and 203 transitions. [2024-05-12 13:44:44,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 271 transitions, 2921 flow [2024-05-12 13:44:44,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 271 transitions, 2744 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-05-12 13:44:44,364 INFO L231 Difference]: Finished difference. Result has 161 places, 219 transitions, 2109 flow [2024-05-12 13:44:44,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1954, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2109, PETRI_PLACES=161, PETRI_TRANSITIONS=219} [2024-05-12 13:44:44,365 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 106 predicate places. [2024-05-12 13:44:44,365 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 219 transitions, 2109 flow [2024-05-12 13:44:44,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 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 13:44:44,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:44:44,365 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 13:44:44,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-05-12 13:44:44,366 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 13:44:44,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:44:44,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1452444315, now seen corresponding path program 3 times [2024-05-12 13:44:44,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:44:44,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601377654] [2024-05-12 13:44:44,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:44:44,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:44:44,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:44:45,751 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 13:44:45,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:44:45,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601377654] [2024-05-12 13:44:45,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601377654] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:44:45,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:44:45,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:44:45,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377386446] [2024-05-12 13:44:45,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:44:45,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:44:45,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:44:45,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:44:45,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:44:45,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:44:45,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 219 transitions, 2109 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 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 13:44:45,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:44:45,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:44:45,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:44:47,556 INFO L124 PetriNetUnfolderBase]: 5410/8689 cut-off events. [2024-05-12 13:44:47,557 INFO L125 PetriNetUnfolderBase]: For 163082/163082 co-relation queries the response was YES. [2024-05-12 13:44:47,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46227 conditions, 8689 events. 5410/8689 cut-off events. For 163082/163082 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 55910 event pairs, 1674 based on Foata normal form. 4/8428 useless extension candidates. Maximal degree in co-relation 46152. Up to 7345 conditions per place. [2024-05-12 13:44:47,638 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 210 selfloop transitions, 51 changer transitions 0/270 dead transitions. [2024-05-12 13:44:47,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 270 transitions, 2879 flow [2024-05-12 13:44:47,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:44:47,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:44:47,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-05-12 13:44:47,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2024-05-12 13:44:47,640 INFO L175 Difference]: Start difference. First operand has 161 places, 219 transitions, 2109 flow. Second operand 8 states and 200 transitions. [2024-05-12 13:44:47,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 270 transitions, 2879 flow [2024-05-12 13:44:47,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 270 transitions, 2748 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-05-12 13:44:47,833 INFO L231 Difference]: Finished difference. Result has 163 places, 221 transitions, 2139 flow [2024-05-12 13:44:47,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1978, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2139, PETRI_PLACES=163, PETRI_TRANSITIONS=221} [2024-05-12 13:44:47,833 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 108 predicate places. [2024-05-12 13:44:47,833 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 221 transitions, 2139 flow [2024-05-12 13:44:47,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 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 13:44:47,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:44:47,834 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 13:44:47,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-05-12 13:44:47,834 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 13:44:47,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:44:47,834 INFO L85 PathProgramCache]: Analyzing trace with hash -389505849, now seen corresponding path program 4 times [2024-05-12 13:44:47,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:44:47,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753460615] [2024-05-12 13:44:47,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:44:47,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:44:47,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:44:49,269 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 13:44:49,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:44:49,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753460615] [2024-05-12 13:44:49,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753460615] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:44:49,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:44:49,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:44:49,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731465833] [2024-05-12 13:44:49,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:44:49,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:44:49,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:44:49,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:44:49,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:44:49,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:44:49,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 221 transitions, 2139 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 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 13:44:49,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:44:49,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:44:49,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:44:50,918 INFO L124 PetriNetUnfolderBase]: 5402/8504 cut-off events. [2024-05-12 13:44:50,918 INFO L125 PetriNetUnfolderBase]: For 168951/168951 co-relation queries the response was YES. [2024-05-12 13:44:50,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46211 conditions, 8504 events. 5402/8504 cut-off events. For 168951/168951 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 53968 event pairs, 1571 based on Foata normal form. 4/8299 useless extension candidates. Maximal degree in co-relation 46135. Up to 7171 conditions per place. [2024-05-12 13:44:51,003 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 205 selfloop transitions, 58 changer transitions 0/272 dead transitions. [2024-05-12 13:44:51,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 272 transitions, 2917 flow [2024-05-12 13:44:51,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:44:51,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:44:51,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-05-12 13:44:51,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2024-05-12 13:44:51,005 INFO L175 Difference]: Start difference. First operand has 163 places, 221 transitions, 2139 flow. Second operand 8 states and 200 transitions. [2024-05-12 13:44:51,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 272 transitions, 2917 flow [2024-05-12 13:44:51,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 272 transitions, 2780 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-05-12 13:44:51,187 INFO L231 Difference]: Finished difference. Result has 165 places, 223 transitions, 2181 flow [2024-05-12 13:44:51,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2002, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2181, PETRI_PLACES=165, PETRI_TRANSITIONS=223} [2024-05-12 13:44:51,188 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 110 predicate places. [2024-05-12 13:44:51,188 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 223 transitions, 2181 flow [2024-05-12 13:44:51,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 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 13:44:51,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:44:51,189 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 13:44:51,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-05-12 13:44:51,189 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:44:51,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:44:51,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1808829501, now seen corresponding path program 1 times [2024-05-12 13:44:51,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:44:51,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372281593] [2024-05-12 13:44:51,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:44:51,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:44:51,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:44:52,033 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 13:44:52,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:44:52,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372281593] [2024-05-12 13:44:52,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372281593] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:44:52,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:44:52,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:44:52,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551311337] [2024-05-12 13:44:52,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:44:52,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:44:52,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:44:52,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:44:52,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:44:52,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:44:52,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 223 transitions, 2181 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:44:52,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:44:52,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:44:52,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:44:53,394 INFO L124 PetriNetUnfolderBase]: 5405/8516 cut-off events. [2024-05-12 13:44:53,394 INFO L125 PetriNetUnfolderBase]: For 174577/174577 co-relation queries the response was YES. [2024-05-12 13:44:53,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46628 conditions, 8516 events. 5405/8516 cut-off events. For 174577/174577 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 54165 event pairs, 1955 based on Foata normal form. 1/8302 useless extension candidates. Maximal degree in co-relation 46551. Up to 7648 conditions per place. [2024-05-12 13:44:53,469 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 214 selfloop transitions, 30 changer transitions 0/253 dead transitions. [2024-05-12 13:44:53,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 253 transitions, 2855 flow [2024-05-12 13:44:53,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:44:53,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:44:53,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-05-12 13:44:53,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48639455782312924 [2024-05-12 13:44:53,473 INFO L175 Difference]: Start difference. First operand has 165 places, 223 transitions, 2181 flow. Second operand 6 states and 143 transitions. [2024-05-12 13:44:53,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 253 transitions, 2855 flow [2024-05-12 13:44:53,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 253 transitions, 2666 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-05-12 13:44:53,688 INFO L231 Difference]: Finished difference. Result has 166 places, 232 transitions, 2201 flow [2024-05-12 13:44:53,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2008, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2201, PETRI_PLACES=166, PETRI_TRANSITIONS=232} [2024-05-12 13:44:53,689 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 111 predicate places. [2024-05-12 13:44:53,689 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 232 transitions, 2201 flow [2024-05-12 13:44:53,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:44:53,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:44:53,689 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 13:44:53,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-05-12 13:44:53,689 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:44:53,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:44:53,690 INFO L85 PathProgramCache]: Analyzing trace with hash 969602589, now seen corresponding path program 1 times [2024-05-12 13:44:53,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:44:53,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445903186] [2024-05-12 13:44:53,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:44:53,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:44:53,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:44:54,340 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 13:44:54,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:44:54,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445903186] [2024-05-12 13:44:54,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445903186] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:44:54,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:44:54,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:44:54,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830688599] [2024-05-12 13:44:54,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:44:54,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:44:54,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:44:54,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:44:54,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:44:54,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:44:54,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 232 transitions, 2201 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:44:54,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:44:54,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:44:54,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:44:55,879 INFO L124 PetriNetUnfolderBase]: 5547/8722 cut-off events. [2024-05-12 13:44:55,879 INFO L125 PetriNetUnfolderBase]: For 183225/183225 co-relation queries the response was YES. [2024-05-12 13:44:55,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47524 conditions, 8722 events. 5547/8722 cut-off events. For 183225/183225 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 55426 event pairs, 1888 based on Foata normal form. 4/8508 useless extension candidates. Maximal degree in co-relation 47445. Up to 7628 conditions per place. [2024-05-12 13:44:55,957 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 213 selfloop transitions, 56 changer transitions 0/278 dead transitions. [2024-05-12 13:44:55,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 278 transitions, 3090 flow [2024-05-12 13:44:55,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:44:55,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:44:55,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-05-12 13:44:55,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49271137026239065 [2024-05-12 13:44:55,959 INFO L175 Difference]: Start difference. First operand has 166 places, 232 transitions, 2201 flow. Second operand 7 states and 169 transitions. [2024-05-12 13:44:55,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 278 transitions, 3090 flow [2024-05-12 13:44:56,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 278 transitions, 3055 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-05-12 13:44:56,152 INFO L231 Difference]: Finished difference. Result has 173 places, 250 transitions, 2513 flow [2024-05-12 13:44:56,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2166, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2513, PETRI_PLACES=173, PETRI_TRANSITIONS=250} [2024-05-12 13:44:56,153 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 118 predicate places. [2024-05-12 13:44:56,153 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 250 transitions, 2513 flow [2024-05-12 13:44:56,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:44:56,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:44:56,153 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 13:44:56,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-05-12 13:44:56,154 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 13:44:56,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:44:56,154 INFO L85 PathProgramCache]: Analyzing trace with hash 970763829, now seen corresponding path program 2 times [2024-05-12 13:44:56,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:44:56,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148598300] [2024-05-12 13:44:56,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:44:56,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:44:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:44:56,912 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 13:44:56,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:44:56,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148598300] [2024-05-12 13:44:56,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148598300] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:44:56,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:44:56,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:44:56,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833177699] [2024-05-12 13:44:56,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:44:56,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:44:56,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:44:56,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:44:56,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:44:56,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:44:56,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 250 transitions, 2513 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:44:56,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:44:56,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:44:56,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:44:58,557 INFO L124 PetriNetUnfolderBase]: 5731/8994 cut-off events. [2024-05-12 13:44:58,557 INFO L125 PetriNetUnfolderBase]: For 200274/200276 co-relation queries the response was YES. [2024-05-12 13:44:58,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50683 conditions, 8994 events. 5731/8994 cut-off events. For 200274/200276 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 57176 event pairs, 1908 based on Foata normal form. 4/8777 useless extension candidates. Maximal degree in co-relation 50600. Up to 7259 conditions per place. [2024-05-12 13:44:58,638 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 209 selfloop transitions, 89 changer transitions 0/307 dead transitions. [2024-05-12 13:44:58,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 307 transitions, 3740 flow [2024-05-12 13:44:58,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:44:58,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:44:58,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-05-12 13:44:58,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5014577259475219 [2024-05-12 13:44:58,640 INFO L175 Difference]: Start difference. First operand has 173 places, 250 transitions, 2513 flow. Second operand 7 states and 172 transitions. [2024-05-12 13:44:58,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 307 transitions, 3740 flow [2024-05-12 13:44:58,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 307 transitions, 3668 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-05-12 13:44:58,889 INFO L231 Difference]: Finished difference. Result has 180 places, 277 transitions, 3043 flow [2024-05-12 13:44:58,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2441, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3043, PETRI_PLACES=180, PETRI_TRANSITIONS=277} [2024-05-12 13:44:58,889 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 125 predicate places. [2024-05-12 13:44:58,889 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 277 transitions, 3043 flow [2024-05-12 13:44:58,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:44:58,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:44:58,890 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 13:44:58,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-05-12 13:44:58,890 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 13:44:58,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:44:58,890 INFO L85 PathProgramCache]: Analyzing trace with hash 971060499, now seen corresponding path program 3 times [2024-05-12 13:44:58,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:44:58,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582489790] [2024-05-12 13:44:58,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:44:58,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:44:58,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:44:59,596 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 13:44:59,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:44:59,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582489790] [2024-05-12 13:44:59,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582489790] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:44:59,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:44:59,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:44:59,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569420872] [2024-05-12 13:44:59,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:44:59,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:44:59,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:44:59,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:44:59,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:44:59,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:44:59,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 277 transitions, 3043 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:44:59,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:44:59,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:44:59,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:45:01,116 INFO L124 PetriNetUnfolderBase]: 5741/8998 cut-off events. [2024-05-12 13:45:01,117 INFO L125 PetriNetUnfolderBase]: For 214990/214992 co-relation queries the response was YES. [2024-05-12 13:45:01,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52847 conditions, 8998 events. 5741/8998 cut-off events. For 214990/214992 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 57128 event pairs, 1881 based on Foata normal form. 8/8785 useless extension candidates. Maximal degree in co-relation 52760. Up to 7278 conditions per place. [2024-05-12 13:45:01,202 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 202 selfloop transitions, 101 changer transitions 0/312 dead transitions. [2024-05-12 13:45:01,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 312 transitions, 4061 flow [2024-05-12 13:45:01,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:45:01,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:45:01,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-05-12 13:45:01,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5043731778425656 [2024-05-12 13:45:01,205 INFO L175 Difference]: Start difference. First operand has 180 places, 277 transitions, 3043 flow. Second operand 7 states and 173 transitions. [2024-05-12 13:45:01,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 312 transitions, 4061 flow [2024-05-12 13:45:01,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 312 transitions, 3930 flow, removed 48 selfloop flow, removed 2 redundant places. [2024-05-12 13:45:01,650 INFO L231 Difference]: Finished difference. Result has 186 places, 284 transitions, 3298 flow [2024-05-12 13:45:01,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2928, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3298, PETRI_PLACES=186, PETRI_TRANSITIONS=284} [2024-05-12 13:45:01,651 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 131 predicate places. [2024-05-12 13:45:01,651 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 284 transitions, 3298 flow [2024-05-12 13:45:01,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:45:01,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:45:01,652 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 13:45:01,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-05-12 13:45:01,652 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:45:01,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:45:01,653 INFO L85 PathProgramCache]: Analyzing trace with hash 971071411, now seen corresponding path program 1 times [2024-05-12 13:45:01,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:45:01,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138587373] [2024-05-12 13:45:01,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:45:01,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:45:01,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:45:02,786 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 13:45:02,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:45:02,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138587373] [2024-05-12 13:45:02,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138587373] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:45:02,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:45:02,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:45:02,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417818433] [2024-05-12 13:45:02,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:45:02,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:45:02,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:45:02,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:45:02,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:45:02,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:45:02,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 284 transitions, 3298 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 13:45:02,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:45:02,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:45:02,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:45:04,538 INFO L124 PetriNetUnfolderBase]: 5969/9309 cut-off events. [2024-05-12 13:45:04,540 INFO L125 PetriNetUnfolderBase]: For 232876/232876 co-relation queries the response was YES. [2024-05-12 13:45:04,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55896 conditions, 9309 events. 5969/9309 cut-off events. For 232876/232876 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 58900 event pairs, 1879 based on Foata normal form. 15/9108 useless extension candidates. Maximal degree in co-relation 55806. Up to 8031 conditions per place. [2024-05-12 13:45:04,630 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 277 selfloop transitions, 56 changer transitions 0/342 dead transitions. [2024-05-12 13:45:04,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 342 transitions, 4489 flow [2024-05-12 13:45:04,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:45:04,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:45:04,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-05-12 13:45:04,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4923469387755102 [2024-05-12 13:45:04,637 INFO L175 Difference]: Start difference. First operand has 186 places, 284 transitions, 3298 flow. Second operand 8 states and 193 transitions. [2024-05-12 13:45:04,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 342 transitions, 4489 flow [2024-05-12 13:45:04,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 342 transitions, 4302 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-05-12 13:45:04,966 INFO L231 Difference]: Finished difference. Result has 192 places, 299 transitions, 3507 flow [2024-05-12 13:45:04,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3119, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3507, PETRI_PLACES=192, PETRI_TRANSITIONS=299} [2024-05-12 13:45:04,967 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 137 predicate places. [2024-05-12 13:45:04,967 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 299 transitions, 3507 flow [2024-05-12 13:45:04,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 13:45:04,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:45:04,968 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 13:45:04,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-05-12 13:45:04,968 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:45:04,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:45:04,968 INFO L85 PathProgramCache]: Analyzing trace with hash 2071386977, now seen corresponding path program 1 times [2024-05-12 13:45:04,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:45:04,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119854486] [2024-05-12 13:45:04,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:45:04,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:45:04,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:45:05,809 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 13:45:05,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:45:05,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119854486] [2024-05-12 13:45:05,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119854486] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:45:05,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:45:05,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:45:05,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510097585] [2024-05-12 13:45:05,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:45:05,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:45:05,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:45:05,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:45:05,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:45:05,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:45:05,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 299 transitions, 3507 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:45:05,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:45:05,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:45:05,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:45:07,507 INFO L124 PetriNetUnfolderBase]: 5974/9323 cut-off events. [2024-05-12 13:45:07,507 INFO L125 PetriNetUnfolderBase]: For 244445/244445 co-relation queries the response was YES. [2024-05-12 13:45:07,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57956 conditions, 9323 events. 5974/9323 cut-off events. For 244445/244445 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 58940 event pairs, 1925 based on Foata normal form. 1/9119 useless extension candidates. Maximal degree in co-relation 57864. Up to 8429 conditions per place. [2024-05-12 13:45:07,658 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 308 selfloop transitions, 21 changer transitions 0/338 dead transitions. [2024-05-12 13:45:07,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 338 transitions, 4372 flow [2024-05-12 13:45:07,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:45:07,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:45:07,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-05-12 13:45:07,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4839650145772595 [2024-05-12 13:45:07,659 INFO L175 Difference]: Start difference. First operand has 192 places, 299 transitions, 3507 flow. Second operand 7 states and 166 transitions. [2024-05-12 13:45:07,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 338 transitions, 4372 flow [2024-05-12 13:45:08,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 338 transitions, 4197 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-05-12 13:45:08,148 INFO L231 Difference]: Finished difference. Result has 196 places, 306 transitions, 3483 flow [2024-05-12 13:45:08,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3332, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3483, PETRI_PLACES=196, PETRI_TRANSITIONS=306} [2024-05-12 13:45:08,149 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 141 predicate places. [2024-05-12 13:45:08,149 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 306 transitions, 3483 flow [2024-05-12 13:45:08,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:45:08,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:45:08,150 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 13:45:08,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-05-12 13:45:08,150 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 13:45:08,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:45:08,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1935839553, now seen corresponding path program 1 times [2024-05-12 13:45:08,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:45:08,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288609290] [2024-05-12 13:45:08,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:45:08,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:45:08,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:45:08,818 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 13:45:08,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:45:08,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288609290] [2024-05-12 13:45:08,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288609290] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:45:08,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:45:08,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:45:08,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142475094] [2024-05-12 13:45:08,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:45:08,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:45:08,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:45:08,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:45:08,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:45:08,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:45:08,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 306 transitions, 3483 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:45:08,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:45:08,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:45:08,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:45:10,542 INFO L124 PetriNetUnfolderBase]: 6004/9354 cut-off events. [2024-05-12 13:45:10,542 INFO L125 PetriNetUnfolderBase]: For 253217/253219 co-relation queries the response was YES. [2024-05-12 13:45:10,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58568 conditions, 9354 events. 6004/9354 cut-off events. For 253217/253219 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 59078 event pairs, 1924 based on Foata normal form. 2/9151 useless extension candidates. Maximal degree in co-relation 58473. Up to 8374 conditions per place. [2024-05-12 13:45:10,648 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 286 selfloop transitions, 48 changer transitions 0/343 dead transitions. [2024-05-12 13:45:10,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 343 transitions, 4355 flow [2024-05-12 13:45:10,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:45:10,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:45:10,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-05-12 13:45:10,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4956268221574344 [2024-05-12 13:45:10,650 INFO L175 Difference]: Start difference. First operand has 196 places, 306 transitions, 3483 flow. Second operand 7 states and 170 transitions. [2024-05-12 13:45:10,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 343 transitions, 4355 flow [2024-05-12 13:45:10,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 343 transitions, 4279 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-05-12 13:45:11,002 INFO L231 Difference]: Finished difference. Result has 200 places, 312 transitions, 3610 flow [2024-05-12 13:45:11,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3407, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3610, PETRI_PLACES=200, PETRI_TRANSITIONS=312} [2024-05-12 13:45:11,002 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 145 predicate places. [2024-05-12 13:45:11,002 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 312 transitions, 3610 flow [2024-05-12 13:45:11,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:45:11,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:45:11,003 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 13:45:11,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-05-12 13:45:11,003 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 13:45:11,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:45:11,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1942535553, now seen corresponding path program 2 times [2024-05-12 13:45:11,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:45:11,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569830847] [2024-05-12 13:45:11,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:45:11,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:45:11,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:45:11,704 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 13:45:11,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:45:11,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569830847] [2024-05-12 13:45:11,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569830847] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:45:11,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:45:11,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:45:11,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414760818] [2024-05-12 13:45:11,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:45:11,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:45:11,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:45:11,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:45:11,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:45:11,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:45:11,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 312 transitions, 3610 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:45:11,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:45:11,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:45:11,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:45:13,434 INFO L124 PetriNetUnfolderBase]: 6094/9469 cut-off events. [2024-05-12 13:45:13,434 INFO L125 PetriNetUnfolderBase]: For 266173/266175 co-relation queries the response was YES. [2024-05-12 13:45:13,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59909 conditions, 9469 events. 6094/9469 cut-off events. For 266173/266175 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 59621 event pairs, 1944 based on Foata normal form. 2/9270 useless extension candidates. Maximal degree in co-relation 59812. Up to 8414 conditions per place. [2024-05-12 13:45:13,535 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 287 selfloop transitions, 60 changer transitions 0/356 dead transitions. [2024-05-12 13:45:13,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 356 transitions, 4744 flow [2024-05-12 13:45:13,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:45:13,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:45:13,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-05-12 13:45:13,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4956268221574344 [2024-05-12 13:45:13,537 INFO L175 Difference]: Start difference. First operand has 200 places, 312 transitions, 3610 flow. Second operand 7 states and 170 transitions. [2024-05-12 13:45:13,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 356 transitions, 4744 flow [2024-05-12 13:45:13,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 356 transitions, 4665 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-05-12 13:45:13,945 INFO L231 Difference]: Finished difference. Result has 205 places, 325 transitions, 3928 flow [2024-05-12 13:45:13,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3531, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3928, PETRI_PLACES=205, PETRI_TRANSITIONS=325} [2024-05-12 13:45:13,946 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 150 predicate places. [2024-05-12 13:45:13,946 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 325 transitions, 3928 flow [2024-05-12 13:45:13,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:45:13,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:45:13,946 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 13:45:13,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-05-12 13:45:13,946 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:45:13,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:45:13,947 INFO L85 PathProgramCache]: Analyzing trace with hash -532149177, now seen corresponding path program 3 times [2024-05-12 13:45:13,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:45:13,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561042000] [2024-05-12 13:45:13,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:45:13,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:45:13,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:45:14,566 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 13:45:14,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:45:14,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561042000] [2024-05-12 13:45:14,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561042000] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:45:14,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:45:14,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:45:14,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149010285] [2024-05-12 13:45:14,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:45:14,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:45:14,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:45:14,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:45:14,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:45:14,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:45:14,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 325 transitions, 3928 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:45:14,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:45:14,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:45:14,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:45:16,254 INFO L124 PetriNetUnfolderBase]: 6088/9478 cut-off events. [2024-05-12 13:45:16,254 INFO L125 PetriNetUnfolderBase]: For 274082/274082 co-relation queries the response was YES. [2024-05-12 13:45:16,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60357 conditions, 9478 events. 6088/9478 cut-off events. For 274082/274082 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 59913 event pairs, 1951 based on Foata normal form. 2/9274 useless extension candidates. Maximal degree in co-relation 60258. Up to 8486 conditions per place. [2024-05-12 13:45:16,364 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 294 selfloop transitions, 50 changer transitions 0/353 dead transitions. [2024-05-12 13:45:16,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 353 transitions, 4728 flow [2024-05-12 13:45:16,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:45:16,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:45:16,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-05-12 13:45:16,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4868804664723032 [2024-05-12 13:45:16,366 INFO L175 Difference]: Start difference. First operand has 205 places, 325 transitions, 3928 flow. Second operand 7 states and 167 transitions. [2024-05-12 13:45:16,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 353 transitions, 4728 flow [2024-05-12 13:45:16,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 353 transitions, 4603 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-05-12 13:45:16,858 INFO L231 Difference]: Finished difference. Result has 208 places, 325 transitions, 3910 flow [2024-05-12 13:45:16,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3803, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3910, PETRI_PLACES=208, PETRI_TRANSITIONS=325} [2024-05-12 13:45:16,859 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 153 predicate places. [2024-05-12 13:45:16,859 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 325 transitions, 3910 flow [2024-05-12 13:45:16,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:45:16,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:45:16,859 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 13:45:16,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-05-12 13:45:16,860 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:45:16,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:45:16,860 INFO L85 PathProgramCache]: Analyzing trace with hash -7105437, now seen corresponding path program 4 times [2024-05-12 13:45:16,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:45:16,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124812836] [2024-05-12 13:45:16,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:45:16,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:45:16,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:45:17,569 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 13:45:17,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:45:17,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124812836] [2024-05-12 13:45:17,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124812836] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:45:17,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:45:17,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:45:17,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108822487] [2024-05-12 13:45:17,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:45:17,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:45:17,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:45:17,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:45:17,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:45:17,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:45:17,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 325 transitions, 3910 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:45:17,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:45:17,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:45:17,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:45:19,267 INFO L124 PetriNetUnfolderBase]: 6072/9463 cut-off events. [2024-05-12 13:45:19,267 INFO L125 PetriNetUnfolderBase]: For 279096/279096 co-relation queries the response was YES. [2024-05-12 13:45:19,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60108 conditions, 9463 events. 6072/9463 cut-off events. For 279096/279096 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 59797 event pairs, 1954 based on Foata normal form. 4/9259 useless extension candidates. Maximal degree in co-relation 60008. Up to 8316 conditions per place. [2024-05-12 13:45:19,376 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 279 selfloop transitions, 64 changer transitions 0/352 dead transitions. [2024-05-12 13:45:19,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 352 transitions, 4718 flow [2024-05-12 13:45:19,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:45:19,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:45:19,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-05-12 13:45:19,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2024-05-12 13:45:19,378 INFO L175 Difference]: Start difference. First operand has 208 places, 325 transitions, 3910 flow. Second operand 7 states and 168 transitions. [2024-05-12 13:45:19,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 352 transitions, 4718 flow [2024-05-12 13:45:19,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 352 transitions, 4566 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-05-12 13:45:19,873 INFO L231 Difference]: Finished difference. Result has 209 places, 325 transitions, 3895 flow [2024-05-12 13:45:19,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3758, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3895, PETRI_PLACES=209, PETRI_TRANSITIONS=325} [2024-05-12 13:45:19,874 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 154 predicate places. [2024-05-12 13:45:19,874 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 325 transitions, 3895 flow [2024-05-12 13:45:19,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:45:19,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:45:19,874 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 13:45:19,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-05-12 13:45:19,875 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:45:19,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:45:19,875 INFO L85 PathProgramCache]: Analyzing trace with hash 28655853, now seen corresponding path program 5 times [2024-05-12 13:45:19,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:45:19,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974493498] [2024-05-12 13:45:19,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:45:19,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:45:19,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:45:20,553 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 13:45:20,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:45:20,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974493498] [2024-05-12 13:45:20,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974493498] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:45:20,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:45:20,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:45:20,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574347733] [2024-05-12 13:45:20,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:45:20,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:45:20,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:45:20,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:45:20,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:45:20,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:45:20,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 325 transitions, 3895 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:45:20,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:45:20,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:45:20,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:45:22,200 INFO L124 PetriNetUnfolderBase]: 6166/9614 cut-off events. [2024-05-12 13:45:22,200 INFO L125 PetriNetUnfolderBase]: For 291381/291383 co-relation queries the response was YES. [2024-05-12 13:45:22,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61202 conditions, 9614 events. 6166/9614 cut-off events. For 291381/291383 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 60916 event pairs, 1899 based on Foata normal form. 6/9414 useless extension candidates. Maximal degree in co-relation 61102. Up to 7736 conditions per place. [2024-05-12 13:45:22,320 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 231 selfloop transitions, 122 changer transitions 0/362 dead transitions. [2024-05-12 13:45:22,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 362 transitions, 5054 flow [2024-05-12 13:45:22,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:45:22,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:45:22,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-05-12 13:45:22,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5043731778425656 [2024-05-12 13:45:22,322 INFO L175 Difference]: Start difference. First operand has 209 places, 325 transitions, 3895 flow. Second operand 7 states and 173 transitions. [2024-05-12 13:45:22,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 362 transitions, 5054 flow [2024-05-12 13:45:22,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 362 transitions, 4885 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-05-12 13:45:22,864 INFO L231 Difference]: Finished difference. Result has 210 places, 334 transitions, 4118 flow [2024-05-12 13:45:22,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3726, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4118, PETRI_PLACES=210, PETRI_TRANSITIONS=334} [2024-05-12 13:45:22,864 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 155 predicate places. [2024-05-12 13:45:22,864 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 334 transitions, 4118 flow [2024-05-12 13:45:22,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:45:22,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:45:22,865 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 13:45:22,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-05-12 13:45:22,865 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:45:22,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:45:22,865 INFO L85 PathProgramCache]: Analyzing trace with hash 28893003, now seen corresponding path program 6 times [2024-05-12 13:45:22,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:45:22,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663821849] [2024-05-12 13:45:22,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:45:22,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:45:22,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:45:23,606 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 13:45:23,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:45:23,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663821849] [2024-05-12 13:45:23,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663821849] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:45:23,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:45:23,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:45:23,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566014223] [2024-05-12 13:45:23,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:45:23,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:45:23,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:45:23,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:45:23,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:45:23,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:45:23,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 334 transitions, 4118 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:45:23,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:45:23,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:45:23,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:45:25,264 INFO L124 PetriNetUnfolderBase]: 6142/9555 cut-off events. [2024-05-12 13:45:25,264 INFO L125 PetriNetUnfolderBase]: For 294576/294578 co-relation queries the response was YES. [2024-05-12 13:45:25,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61369 conditions, 9555 events. 6142/9555 cut-off events. For 294576/294578 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 60346 event pairs, 1923 based on Foata normal form. 6/9355 useless extension candidates. Maximal degree in co-relation 61268. Up to 7720 conditions per place. [2024-05-12 13:45:25,366 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 231 selfloop transitions, 121 changer transitions 0/361 dead transitions. [2024-05-12 13:45:25,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 361 transitions, 5050 flow [2024-05-12 13:45:25,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:45:25,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:45:25,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-05-12 13:45:25,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5014577259475219 [2024-05-12 13:45:25,368 INFO L175 Difference]: Start difference. First operand has 210 places, 334 transitions, 4118 flow. Second operand 7 states and 172 transitions. [2024-05-12 13:45:25,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 361 transitions, 5050 flow [2024-05-12 13:45:25,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 361 transitions, 4583 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-05-12 13:45:25,937 INFO L231 Difference]: Finished difference. Result has 210 places, 334 transitions, 3908 flow [2024-05-12 13:45:25,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3651, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3908, PETRI_PLACES=210, PETRI_TRANSITIONS=334} [2024-05-12 13:45:25,937 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 155 predicate places. [2024-05-12 13:45:25,937 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 334 transitions, 3908 flow [2024-05-12 13:45:25,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:45:25,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:45:25,938 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 13:45:25,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-05-12 13:45:25,938 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:45:25,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:45:25,938 INFO L85 PathProgramCache]: Analyzing trace with hash 38426123, now seen corresponding path program 1 times [2024-05-12 13:45:25,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:45:25,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446201997] [2024-05-12 13:45:25,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:45:25,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:45:25,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:45:26,858 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 13:45:26,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:45:26,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446201997] [2024-05-12 13:45:26,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446201997] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:45:26,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:45:26,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:45:26,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520106412] [2024-05-12 13:45:26,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:45:26,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:45:26,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:45:26,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:45:26,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:45:26,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:45:26,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 334 transitions, 3908 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:45:26,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:45:26,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:45:26,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:45:28,578 INFO L124 PetriNetUnfolderBase]: 6163/9612 cut-off events. [2024-05-12 13:45:28,578 INFO L125 PetriNetUnfolderBase]: For 292070/292070 co-relation queries the response was YES. [2024-05-12 13:45:28,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61031 conditions, 9612 events. 6163/9612 cut-off events. For 292070/292070 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 60990 event pairs, 1908 based on Foata normal form. 2/9400 useless extension candidates. Maximal degree in co-relation 60931. Up to 8468 conditions per place. [2024-05-12 13:45:28,681 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 317 selfloop transitions, 57 changer transitions 0/383 dead transitions. [2024-05-12 13:45:28,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 383 transitions, 5138 flow [2024-05-12 13:45:28,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:45:28,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:45:28,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-05-12 13:45:28,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47959183673469385 [2024-05-12 13:45:28,682 INFO L175 Difference]: Start difference. First operand has 210 places, 334 transitions, 3908 flow. Second operand 8 states and 188 transitions. [2024-05-12 13:45:28,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 383 transitions, 5138 flow [2024-05-12 13:45:29,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 383 transitions, 4831 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-05-12 13:45:29,238 INFO L231 Difference]: Finished difference. Result has 212 places, 343 transitions, 3921 flow [2024-05-12 13:45:29,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3624, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3921, PETRI_PLACES=212, PETRI_TRANSITIONS=343} [2024-05-12 13:45:29,239 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 157 predicate places. [2024-05-12 13:45:29,239 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 343 transitions, 3921 flow [2024-05-12 13:45:29,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:45:29,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:45:29,239 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 13:45:29,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-05-12 13:45:29,239 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:45:29,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:45:29,240 INFO L85 PathProgramCache]: Analyzing trace with hash -227805969, now seen corresponding path program 1 times [2024-05-12 13:45:29,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:45:29,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212381734] [2024-05-12 13:45:29,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:45:29,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:45:29,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:45:30,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:45:30,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:45:30,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212381734] [2024-05-12 13:45:30,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212381734] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:45:30,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:45:30,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:45:30,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807307157] [2024-05-12 13:45:30,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:45:30,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:45:30,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:45:30,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:45:30,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:45:30,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:45:30,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 343 transitions, 3921 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 13:45:30,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:45:30,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:45:30,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:45:32,110 INFO L124 PetriNetUnfolderBase]: 6229/9745 cut-off events. [2024-05-12 13:45:32,110 INFO L125 PetriNetUnfolderBase]: For 304286/304286 co-relation queries the response was YES. [2024-05-12 13:45:32,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62492 conditions, 9745 events. 6229/9745 cut-off events. For 304286/304286 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 62228 event pairs, 1882 based on Foata normal form. 2/9519 useless extension candidates. Maximal degree in co-relation 62391. Up to 8704 conditions per place. [2024-05-12 13:45:32,223 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 346 selfloop transitions, 35 changer transitions 0/390 dead transitions. [2024-05-12 13:45:32,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 390 transitions, 4982 flow [2024-05-12 13:45:32,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:45:32,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:45:32,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-05-12 13:45:32,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5043731778425656 [2024-05-12 13:45:32,224 INFO L175 Difference]: Start difference. First operand has 212 places, 343 transitions, 3921 flow. Second operand 7 states and 173 transitions. [2024-05-12 13:45:32,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 390 transitions, 4982 flow [2024-05-12 13:45:32,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 390 transitions, 4775 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-05-12 13:45:32,747 INFO L231 Difference]: Finished difference. Result has 215 places, 353 transitions, 3934 flow [2024-05-12 13:45:32,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3714, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3934, PETRI_PLACES=215, PETRI_TRANSITIONS=353} [2024-05-12 13:45:32,748 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 160 predicate places. [2024-05-12 13:45:32,748 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 353 transitions, 3934 flow [2024-05-12 13:45:32,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 13:45:32,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:45:32,748 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 13:45:32,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-05-12 13:45:32,749 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 13:45:32,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:45:32,749 INFO L85 PathProgramCache]: Analyzing trace with hash -11766752, now seen corresponding path program 1 times [2024-05-12 13:45:32,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:45:32,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874578443] [2024-05-12 13:45:32,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:45:32,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:45:32,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:45:33,720 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 13:45:33,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:45:33,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874578443] [2024-05-12 13:45:33,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874578443] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:45:33,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:45:33,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:45:33,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802146814] [2024-05-12 13:45:33,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:45:33,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:45:33,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:45:33,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:45:33,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:45:33,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:45:33,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 353 transitions, 3934 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 13:45:33,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:45:33,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:45:33,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:45:35,567 INFO L124 PetriNetUnfolderBase]: 6244/9699 cut-off events. [2024-05-12 13:45:35,567 INFO L125 PetriNetUnfolderBase]: For 314028/314028 co-relation queries the response was YES. [2024-05-12 13:45:35,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63422 conditions, 9699 events. 6244/9699 cut-off events. For 314028/314028 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 61266 event pairs, 1930 based on Foata normal form. 2/9489 useless extension candidates. Maximal degree in co-relation 63318. Up to 8478 conditions per place. [2024-05-12 13:45:35,662 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 304 selfloop transitions, 90 changer transitions 0/403 dead transitions. [2024-05-12 13:45:35,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 403 transitions, 5269 flow [2024-05-12 13:45:35,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:45:35,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:45:35,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-05-12 13:45:35,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4956268221574344 [2024-05-12 13:45:35,664 INFO L175 Difference]: Start difference. First operand has 215 places, 353 transitions, 3934 flow. Second operand 7 states and 170 transitions. [2024-05-12 13:45:35,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 403 transitions, 5269 flow [2024-05-12 13:45:36,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 403 transitions, 5154 flow, removed 44 selfloop flow, removed 2 redundant places. [2024-05-12 13:45:36,234 INFO L231 Difference]: Finished difference. Result has 222 places, 376 transitions, 4446 flow [2024-05-12 13:45:36,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3837, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4446, PETRI_PLACES=222, PETRI_TRANSITIONS=376} [2024-05-12 13:45:36,234 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 167 predicate places. [2024-05-12 13:45:36,234 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 376 transitions, 4446 flow [2024-05-12 13:45:36,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 13:45:36,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:45:36,235 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 13:45:36,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-05-12 13:45:36,235 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 13:45:36,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:45:36,235 INFO L85 PathProgramCache]: Analyzing trace with hash -239137691, now seen corresponding path program 2 times [2024-05-12 13:45:36,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:45:36,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275098315] [2024-05-12 13:45:36,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:45:36,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:45:36,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:45:37,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:45:37,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:45:37,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275098315] [2024-05-12 13:45:37,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275098315] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:45:37,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:45:37,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:45:37,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204480433] [2024-05-12 13:45:37,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:45:37,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:45:37,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:45:37,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:45:37,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:45:37,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:45:37,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 376 transitions, 4446 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 13:45:37,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:45:37,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:45:37,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:45:39,292 INFO L124 PetriNetUnfolderBase]: 6324/9869 cut-off events. [2024-05-12 13:45:39,292 INFO L125 PetriNetUnfolderBase]: For 328856/328856 co-relation queries the response was YES. [2024-05-12 13:45:39,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65236 conditions, 9869 events. 6324/9869 cut-off events. For 328856/328856 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 62853 event pairs, 1861 based on Foata normal form. 2/9643 useless extension candidates. Maximal degree in co-relation 65128. Up to 8755 conditions per place. [2024-05-12 13:45:39,395 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 367 selfloop transitions, 53 changer transitions 0/429 dead transitions. [2024-05-12 13:45:39,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 429 transitions, 5723 flow [2024-05-12 13:45:39,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:45:39,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:45:39,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-05-12 13:45:39,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5072886297376094 [2024-05-12 13:45:39,396 INFO L175 Difference]: Start difference. First operand has 222 places, 376 transitions, 4446 flow. Second operand 7 states and 174 transitions. [2024-05-12 13:45:39,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 429 transitions, 5723 flow [2024-05-12 13:45:39,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 429 transitions, 5595 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-05-12 13:45:39,911 INFO L231 Difference]: Finished difference. Result has 229 places, 391 transitions, 4705 flow [2024-05-12 13:45:39,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4322, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4705, PETRI_PLACES=229, PETRI_TRANSITIONS=391} [2024-05-12 13:45:39,912 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 174 predicate places. [2024-05-12 13:45:39,912 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 391 transitions, 4705 flow [2024-05-12 13:45:39,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 13:45:39,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:45:39,913 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 13:45:39,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-05-12 13:45:39,913 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 13:45:39,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:45:39,913 INFO L85 PathProgramCache]: Analyzing trace with hash 28901931, now seen corresponding path program 3 times [2024-05-12 13:45:39,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:45:39,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953383667] [2024-05-12 13:45:39,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:45:39,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:45:39,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:45:41,134 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 13:45:41,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:45:41,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953383667] [2024-05-12 13:45:41,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953383667] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:45:41,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:45:41,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:45:41,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689655433] [2024-05-12 13:45:41,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:45:41,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:45:41,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:45:41,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:45:41,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:45:41,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:45:41,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 391 transitions, 4705 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 13:45:41,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:45:41,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:45:41,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:45:43,102 INFO L124 PetriNetUnfolderBase]: 6344/9924 cut-off events. [2024-05-12 13:45:43,102 INFO L125 PetriNetUnfolderBase]: For 335624/335626 co-relation queries the response was YES. [2024-05-12 13:45:43,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66232 conditions, 9924 events. 6344/9924 cut-off events. For 335624/335626 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 63534 event pairs, 1840 based on Foata normal form. 2/9692 useless extension candidates. Maximal degree in co-relation 66120. Up to 8672 conditions per place. [2024-05-12 13:45:43,208 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 361 selfloop transitions, 66 changer transitions 0/436 dead transitions. [2024-05-12 13:45:43,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 436 transitions, 6007 flow [2024-05-12 13:45:43,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:45:43,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:45:43,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-05-12 13:45:43,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4956268221574344 [2024-05-12 13:45:43,210 INFO L175 Difference]: Start difference. First operand has 229 places, 391 transitions, 4705 flow. Second operand 7 states and 170 transitions. [2024-05-12 13:45:43,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 436 transitions, 6007 flow [2024-05-12 13:45:43,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 436 transitions, 5921 flow, removed 42 selfloop flow, removed 1 redundant places. [2024-05-12 13:45:43,832 INFO L231 Difference]: Finished difference. Result has 237 places, 401 transitions, 5032 flow [2024-05-12 13:45:43,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4619, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5032, PETRI_PLACES=237, PETRI_TRANSITIONS=401} [2024-05-12 13:45:43,833 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 182 predicate places. [2024-05-12 13:45:43,833 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 401 transitions, 5032 flow [2024-05-12 13:45:43,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 13:45:43,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:45:43,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:45:43,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-05-12 13:45:43,834 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:45:43,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:45:43,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1615640636, now seen corresponding path program 1 times [2024-05-12 13:45:43,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:45:43,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927174790] [2024-05-12 13:45:43,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:45:43,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:45:43,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:45:45,121 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 13:45:45,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:45:45,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927174790] [2024-05-12 13:45:45,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927174790] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:45:45,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:45:45,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:45:45,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943254323] [2024-05-12 13:45:45,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:45:45,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:45:45,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:45:45,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:45:45,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:45:45,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:45:45,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 401 transitions, 5032 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 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 13:45:45,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:45:45,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:45:45,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:45:47,403 INFO L124 PetriNetUnfolderBase]: 6734/10729 cut-off events. [2024-05-12 13:45:47,404 INFO L125 PetriNetUnfolderBase]: For 410696/410696 co-relation queries the response was YES. [2024-05-12 13:45:47,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73445 conditions, 10729 events. 6734/10729 cut-off events. For 410696/410696 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 70755 event pairs, 1680 based on Foata normal form. 16/10439 useless extension candidates. Maximal degree in co-relation 73328. Up to 8644 conditions per place. [2024-05-12 13:45:47,526 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 431 selfloop transitions, 47 changer transitions 0/487 dead transitions. [2024-05-12 13:45:47,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 487 transitions, 6736 flow [2024-05-12 13:45:47,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:45:47,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:45:47,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 262 transitions. [2024-05-12 13:45:47,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5346938775510204 [2024-05-12 13:45:47,527 INFO L175 Difference]: Start difference. First operand has 237 places, 401 transitions, 5032 flow. Second operand 10 states and 262 transitions. [2024-05-12 13:45:47,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 487 transitions, 6736 flow [2024-05-12 13:45:48,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 487 transitions, 6576 flow, removed 65 selfloop flow, removed 2 redundant places. [2024-05-12 13:45:48,143 INFO L231 Difference]: Finished difference. Result has 246 places, 405 transitions, 5123 flow [2024-05-12 13:45:48,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4872, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5123, PETRI_PLACES=246, PETRI_TRANSITIONS=405} [2024-05-12 13:45:48,144 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 191 predicate places. [2024-05-12 13:45:48,144 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 405 transitions, 5123 flow [2024-05-12 13:45:48,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 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 13:45:48,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:45:48,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:45:48,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-05-12 13:45:48,145 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:45:48,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:45:48,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1507756328, now seen corresponding path program 2 times [2024-05-12 13:45:48,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:45:48,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042277227] [2024-05-12 13:45:48,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:45:48,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:45:48,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:45:49,428 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 13:45:49,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:45:49,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042277227] [2024-05-12 13:45:49,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042277227] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:45:49,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:45:49,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:45:49,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945250068] [2024-05-12 13:45:49,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:45:49,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:45:49,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:45:49,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:45:49,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:45:49,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:45:49,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 405 transitions, 5123 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 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 13:45:49,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:45:49,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:45:49,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:45:51,812 INFO L124 PetriNetUnfolderBase]: 6882/10858 cut-off events. [2024-05-12 13:45:51,812 INFO L125 PetriNetUnfolderBase]: For 424402/424402 co-relation queries the response was YES. [2024-05-12 13:45:51,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75221 conditions, 10858 events. 6882/10858 cut-off events. For 424402/424402 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 71126 event pairs, 2006 based on Foata normal form. 16/10601 useless extension candidates. Maximal degree in co-relation 75101. Up to 9062 conditions per place. [2024-05-12 13:45:52,000 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 428 selfloop transitions, 41 changer transitions 0/478 dead transitions. [2024-05-12 13:45:52,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 478 transitions, 6671 flow [2024-05-12 13:45:52,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:45:52,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:45:52,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-05-12 13:45:52,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5351473922902494 [2024-05-12 13:45:52,007 INFO L175 Difference]: Start difference. First operand has 246 places, 405 transitions, 5123 flow. Second operand 9 states and 236 transitions. [2024-05-12 13:45:52,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 478 transitions, 6671 flow [2024-05-12 13:45:53,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 478 transitions, 6537 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-05-12 13:45:53,098 INFO L231 Difference]: Finished difference. Result has 251 places, 407 transitions, 5156 flow [2024-05-12 13:45:53,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4991, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5156, PETRI_PLACES=251, PETRI_TRANSITIONS=407} [2024-05-12 13:45:53,098 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 196 predicate places. [2024-05-12 13:45:53,099 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 407 transitions, 5156 flow [2024-05-12 13:45:53,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 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 13:45:53,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:45:53,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:45:53,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-05-12 13:45:53,099 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:45:53,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:45:53,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1507933958, now seen corresponding path program 3 times [2024-05-12 13:45:53,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:45:53,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104012493] [2024-05-12 13:45:53,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:45:53,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:45:53,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:45:54,522 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 13:45:54,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:45:54,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104012493] [2024-05-12 13:45:54,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104012493] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:45:54,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:45:54,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:45:54,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014593336] [2024-05-12 13:45:54,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:45:54,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:45:54,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:45:54,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:45:54,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:45:54,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:45:54,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 407 transitions, 5156 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 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 13:45:54,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:45:54,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:45:54,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:45:56,891 INFO L124 PetriNetUnfolderBase]: 6846/10820 cut-off events. [2024-05-12 13:45:56,892 INFO L125 PetriNetUnfolderBase]: For 414986/414986 co-relation queries the response was YES. [2024-05-12 13:45:56,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73826 conditions, 10820 events. 6846/10820 cut-off events. For 414986/414986 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 71069 event pairs, 2039 based on Foata normal form. 20/10561 useless extension candidates. Maximal degree in co-relation 73703. Up to 9360 conditions per place. [2024-05-12 13:45:57,033 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 423 selfloop transitions, 39 changer transitions 0/471 dead transitions. [2024-05-12 13:45:57,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 471 transitions, 6441 flow [2024-05-12 13:45:57,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:45:57,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:45:57,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-05-12 13:45:57,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192743764172335 [2024-05-12 13:45:57,035 INFO L175 Difference]: Start difference. First operand has 251 places, 407 transitions, 5156 flow. Second operand 9 states and 229 transitions. [2024-05-12 13:45:57,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 471 transitions, 6441 flow [2024-05-12 13:45:57,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 471 transitions, 6277 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-05-12 13:45:57,942 INFO L231 Difference]: Finished difference. Result has 253 places, 408 transitions, 5120 flow [2024-05-12 13:45:57,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5014, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5120, PETRI_PLACES=253, PETRI_TRANSITIONS=408} [2024-05-12 13:45:57,943 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 198 predicate places. [2024-05-12 13:45:57,943 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 408 transitions, 5120 flow [2024-05-12 13:45:57,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 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 13:45:57,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:45:57,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:45:57,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-05-12 13:45:57,943 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 13:45:57,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:45:57,944 INFO L85 PathProgramCache]: Analyzing trace with hash -266277152, now seen corresponding path program 1 times [2024-05-12 13:45:57,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:45:57,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037864819] [2024-05-12 13:45:57,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:45:57,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:45:57,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:45:58,785 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 13:45:58,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:45:58,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037864819] [2024-05-12 13:45:58,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037864819] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:45:58,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:45:58,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:45:58,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606332236] [2024-05-12 13:45:58,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:45:58,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:45:58,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:45:58,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:45:58,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:45:58,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:45:58,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 408 transitions, 5120 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:45:58,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:45:58,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:45:58,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:46:00,710 INFO L124 PetriNetUnfolderBase]: 6851/10747 cut-off events. [2024-05-12 13:46:00,710 INFO L125 PetriNetUnfolderBase]: For 384424/384424 co-relation queries the response was YES. [2024-05-12 13:46:00,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72390 conditions, 10747 events. 6851/10747 cut-off events. For 384424/384424 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 69898 event pairs, 2104 based on Foata normal form. 1/10490 useless extension candidates. Maximal degree in co-relation 72266. Up to 9510 conditions per place. [2024-05-12 13:46:00,841 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 383 selfloop transitions, 49 changer transitions 0/441 dead transitions. [2024-05-12 13:46:00,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 441 transitions, 6305 flow [2024-05-12 13:46:00,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:46:00,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:46:00,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-05-12 13:46:00,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2024-05-12 13:46:00,843 INFO L175 Difference]: Start difference. First operand has 253 places, 408 transitions, 5120 flow. Second operand 6 states and 144 transitions. [2024-05-12 13:46:00,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 441 transitions, 6305 flow [2024-05-12 13:46:01,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 441 transitions, 6228 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-05-12 13:46:01,632 INFO L231 Difference]: Finished difference. Result has 252 places, 411 transitions, 5216 flow [2024-05-12 13:46:01,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5043, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5216, PETRI_PLACES=252, PETRI_TRANSITIONS=411} [2024-05-12 13:46:01,633 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 197 predicate places. [2024-05-12 13:46:01,633 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 411 transitions, 5216 flow [2024-05-12 13:46:01,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:46:01,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:46:01,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:46:01,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-05-12 13:46:01,634 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 13:46:01,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:46:01,634 INFO L85 PathProgramCache]: Analyzing trace with hash 983463046, now seen corresponding path program 4 times [2024-05-12 13:46:01,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:46:01,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827118763] [2024-05-12 13:46:01,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:46:01,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:46:01,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:46:02,834 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 13:46:02,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:46:02,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827118763] [2024-05-12 13:46:02,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827118763] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:46:02,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:46:02,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:46:02,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91095625] [2024-05-12 13:46:02,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:46:02,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:46:02,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:46:02,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:46:02,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:46:02,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:46:02,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 411 transitions, 5216 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 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 13:46:02,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:46:02,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:46:02,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:46:05,266 INFO L124 PetriNetUnfolderBase]: 7225/11496 cut-off events. [2024-05-12 13:46:05,267 INFO L125 PetriNetUnfolderBase]: For 454667/454669 co-relation queries the response was YES. [2024-05-12 13:46:05,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79065 conditions, 11496 events. 7225/11496 cut-off events. For 454667/454669 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 75966 event pairs, 1871 based on Foata normal form. 16/11205 useless extension candidates. Maximal degree in co-relation 78940. Up to 8909 conditions per place. [2024-05-12 13:46:05,404 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 392 selfloop transitions, 92 changer transitions 0/493 dead transitions. [2024-05-12 13:46:05,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 493 transitions, 6931 flow [2024-05-12 13:46:05,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:46:05,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:46:05,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 246 transitions. [2024-05-12 13:46:05,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2024-05-12 13:46:05,406 INFO L175 Difference]: Start difference. First operand has 252 places, 411 transitions, 5216 flow. Second operand 9 states and 246 transitions. [2024-05-12 13:46:05,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 493 transitions, 6931 flow [2024-05-12 13:46:06,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 493 transitions, 6828 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-05-12 13:46:06,393 INFO L231 Difference]: Finished difference. Result has 257 places, 413 transitions, 5385 flow [2024-05-12 13:46:06,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5113, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5385, PETRI_PLACES=257, PETRI_TRANSITIONS=413} [2024-05-12 13:46:06,394 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 202 predicate places. [2024-05-12 13:46:06,394 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 413 transitions, 5385 flow [2024-05-12 13:46:06,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 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 13:46:06,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:46:06,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:46:06,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-05-12 13:46:06,395 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 13:46:06,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:46:06,395 INFO L85 PathProgramCache]: Analyzing trace with hash 894374824, now seen corresponding path program 5 times [2024-05-12 13:46:06,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:46:06,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119420753] [2024-05-12 13:46:06,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:46:06,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:46:06,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:46:07,866 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 13:46:07,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:46:07,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119420753] [2024-05-12 13:46:07,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119420753] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:46:07,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:46:07,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:46:07,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127849891] [2024-05-12 13:46:07,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:46:07,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:46:07,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:46:07,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:46:07,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:46:07,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:46:07,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 413 transitions, 5385 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 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 13:46:07,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:46:07,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:46:07,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:46:10,525 INFO L124 PetriNetUnfolderBase]: 7415/11861 cut-off events. [2024-05-12 13:46:10,526 INFO L125 PetriNetUnfolderBase]: For 490749/490751 co-relation queries the response was YES. [2024-05-12 13:46:10,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82570 conditions, 11861 events. 7415/11861 cut-off events. For 490749/490751 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 79337 event pairs, 1960 based on Foata normal form. 20/11554 useless extension candidates. Maximal degree in co-relation 82444. Up to 9563 conditions per place. [2024-05-12 13:46:10,662 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 389 selfloop transitions, 90 changer transitions 0/488 dead transitions. [2024-05-12 13:46:10,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 488 transitions, 6848 flow [2024-05-12 13:46:10,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:46:10,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:46:10,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 241 transitions. [2024-05-12 13:46:10,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546485260770975 [2024-05-12 13:46:10,669 INFO L175 Difference]: Start difference. First operand has 257 places, 413 transitions, 5385 flow. Second operand 9 states and 241 transitions. [2024-05-12 13:46:10,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 488 transitions, 6848 flow [2024-05-12 13:46:11,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 488 transitions, 6694 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-05-12 13:46:11,590 INFO L231 Difference]: Finished difference. Result has 261 places, 414 transitions, 5462 flow [2024-05-12 13:46:11,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5237, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5462, PETRI_PLACES=261, PETRI_TRANSITIONS=414} [2024-05-12 13:46:11,591 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 206 predicate places. [2024-05-12 13:46:11,591 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 414 transitions, 5462 flow [2024-05-12 13:46:11,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 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 13:46:11,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:46:11,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:46:11,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-05-12 13:46:11,592 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 13:46:11,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:46:11,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1284661498, now seen corresponding path program 6 times [2024-05-12 13:46:11,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:46:11,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447715174] [2024-05-12 13:46:11,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:46:11,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:46:11,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:46:12,810 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 13:46:12,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:46:12,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447715174] [2024-05-12 13:46:12,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447715174] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:46:12,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:46:12,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:46:12,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707048659] [2024-05-12 13:46:12,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:46:12,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:46:12,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:46:12,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:46:12,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:46:12,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:46:12,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 414 transitions, 5462 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 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 13:46:12,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:46:12,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:46:12,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:46:15,331 INFO L124 PetriNetUnfolderBase]: 7379/11806 cut-off events. [2024-05-12 13:46:15,331 INFO L125 PetriNetUnfolderBase]: For 464672/464674 co-relation queries the response was YES. [2024-05-12 13:46:15,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81022 conditions, 11806 events. 7379/11806 cut-off events. For 464672/464674 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 78973 event pairs, 1944 based on Foata normal form. 20/11497 useless extension candidates. Maximal degree in co-relation 80894. Up to 9507 conditions per place. [2024-05-12 13:46:15,475 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 386 selfloop transitions, 91 changer transitions 0/486 dead transitions. [2024-05-12 13:46:15,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 486 transitions, 6871 flow [2024-05-12 13:46:15,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:46:15,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:46:15,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-05-12 13:46:15,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2024-05-12 13:46:15,477 INFO L175 Difference]: Start difference. First operand has 261 places, 414 transitions, 5462 flow. Second operand 9 states and 238 transitions. [2024-05-12 13:46:15,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 486 transitions, 6871 flow [2024-05-12 13:46:16,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 486 transitions, 6656 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-05-12 13:46:16,489 INFO L231 Difference]: Finished difference. Result has 263 places, 414 transitions, 5436 flow [2024-05-12 13:46:16,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5247, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5436, PETRI_PLACES=263, PETRI_TRANSITIONS=414} [2024-05-12 13:46:16,490 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 208 predicate places. [2024-05-12 13:46:16,490 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 414 transitions, 5436 flow [2024-05-12 13:46:16,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 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 13:46:16,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:46:16,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:46:16,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-05-12 13:46:16,490 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 13:46:16,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:46:16,491 INFO L85 PathProgramCache]: Analyzing trace with hash -652814636, now seen corresponding path program 1 times [2024-05-12 13:46:16,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:46:16,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417208793] [2024-05-12 13:46:16,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:46:16,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:46:16,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:46:18,404 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 13:46:18,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:46:18,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417208793] [2024-05-12 13:46:18,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417208793] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:46:18,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:46:18,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:46:18,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389765767] [2024-05-12 13:46:18,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:46:18,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:46:18,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:46:18,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:46:18,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:46:18,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:46:18,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 414 transitions, 5436 flow. Second operand has 11 states, 11 states have (on average 13.454545454545455) internal successors, (148), 11 states have internal predecessors, (148), 0 states have call successors, (0), 0 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 13:46:18,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:46:18,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:46:18,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:46:21,074 INFO L124 PetriNetUnfolderBase]: 7485/11904 cut-off events. [2024-05-12 13:46:21,074 INFO L125 PetriNetUnfolderBase]: For 458931/458933 co-relation queries the response was YES. [2024-05-12 13:46:21,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81392 conditions, 11904 events. 7485/11904 cut-off events. For 458931/458933 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 79435 event pairs, 1895 based on Foata normal form. 12/11607 useless extension candidates. Maximal degree in co-relation 81263. Up to 8991 conditions per place. [2024-05-12 13:46:21,206 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 385 selfloop transitions, 95 changer transitions 0/489 dead transitions. [2024-05-12 13:46:21,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 489 transitions, 6915 flow [2024-05-12 13:46:21,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:46:21,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:46:21,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 239 transitions. [2024-05-12 13:46:21,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5419501133786848 [2024-05-12 13:46:21,207 INFO L175 Difference]: Start difference. First operand has 263 places, 414 transitions, 5436 flow. Second operand 9 states and 239 transitions. [2024-05-12 13:46:21,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 489 transitions, 6915 flow [2024-05-12 13:46:22,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 489 transitions, 6723 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-05-12 13:46:22,164 INFO L231 Difference]: Finished difference. Result has 264 places, 415 transitions, 5484 flow [2024-05-12 13:46:22,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5244, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5484, PETRI_PLACES=264, PETRI_TRANSITIONS=415} [2024-05-12 13:46:22,165 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 209 predicate places. [2024-05-12 13:46:22,165 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 415 transitions, 5484 flow [2024-05-12 13:46:22,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.454545454545455) internal successors, (148), 11 states have internal predecessors, (148), 0 states have call successors, (0), 0 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 13:46:22,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:46:22,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:46:22,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-05-12 13:46:22,166 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:46:22,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:46:22,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1206152444, now seen corresponding path program 1 times [2024-05-12 13:46:22,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:46:22,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427347457] [2024-05-12 13:46:22,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:46:22,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:46:22,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:46:23,091 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 13:46:23,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:46:23,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427347457] [2024-05-12 13:46:23,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427347457] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:46:23,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:46:23,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:46:23,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378034815] [2024-05-12 13:46:23,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:46:23,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:46:23,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:46:23,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:46:23,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:46:23,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:46:23,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 415 transitions, 5484 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 13:46:23,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:46:23,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:46:23,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:46:25,484 INFO L124 PetriNetUnfolderBase]: 7500/11845 cut-off events. [2024-05-12 13:46:25,484 INFO L125 PetriNetUnfolderBase]: For 459222/459224 co-relation queries the response was YES. [2024-05-12 13:46:25,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81784 conditions, 11845 events. 7500/11845 cut-off events. For 459222/459224 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 78795 event pairs, 2413 based on Foata normal form. 1/11566 useless extension candidates. Maximal degree in co-relation 81654. Up to 10595 conditions per place. [2024-05-12 13:46:25,623 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 381 selfloop transitions, 60 changer transitions 0/450 dead transitions. [2024-05-12 13:46:25,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 450 transitions, 6554 flow [2024-05-12 13:46:25,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:46:25,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:46:25,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-05-12 13:46:25,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49854227405247814 [2024-05-12 13:46:25,625 INFO L175 Difference]: Start difference. First operand has 264 places, 415 transitions, 5484 flow. Second operand 7 states and 171 transitions. [2024-05-12 13:46:25,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 450 transitions, 6554 flow [2024-05-12 13:46:26,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 450 transitions, 6336 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-05-12 13:46:26,574 INFO L231 Difference]: Finished difference. Result has 265 places, 420 transitions, 5496 flow [2024-05-12 13:46:26,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5266, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5496, PETRI_PLACES=265, PETRI_TRANSITIONS=420} [2024-05-12 13:46:26,574 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 210 predicate places. [2024-05-12 13:46:26,574 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 420 transitions, 5496 flow [2024-05-12 13:46:26,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 13:46:26,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:46:26,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:46:26,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-05-12 13:46:26,575 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:46:26,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:46:26,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1211549428, now seen corresponding path program 7 times [2024-05-12 13:46:26,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:46:26,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833120353] [2024-05-12 13:46:26,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:46:26,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:46:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:46:27,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:46:27,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:46:27,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833120353] [2024-05-12 13:46:27,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833120353] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:46:27,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:46:27,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:46:27,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156923234] [2024-05-12 13:46:27,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:46:27,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:46:27,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:46:27,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:46:27,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:46:28,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:46:28,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 420 transitions, 5496 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 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 13:46:28,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:46:28,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:46:28,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:46:30,567 INFO L124 PetriNetUnfolderBase]: 7690/12309 cut-off events. [2024-05-12 13:46:30,568 INFO L125 PetriNetUnfolderBase]: For 498559/498559 co-relation queries the response was YES. [2024-05-12 13:46:30,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83454 conditions, 12309 events. 7690/12309 cut-off events. For 498559/498559 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 83280 event pairs, 2011 based on Foata normal form. 20/11980 useless extension candidates. Maximal degree in co-relation 83322. Up to 9983 conditions per place. [2024-05-12 13:46:30,719 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 384 selfloop transitions, 93 changer transitions 0/486 dead transitions. [2024-05-12 13:46:30,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 486 transitions, 6914 flow [2024-05-12 13:46:30,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:46:30,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:46:30,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-05-12 13:46:30,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-05-12 13:46:30,720 INFO L175 Difference]: Start difference. First operand has 265 places, 420 transitions, 5496 flow. Second operand 9 states and 231 transitions. [2024-05-12 13:46:30,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 486 transitions, 6914 flow [2024-05-12 13:46:31,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 486 transitions, 6825 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-05-12 13:46:31,717 INFO L231 Difference]: Finished difference. Result has 270 places, 421 transitions, 5646 flow [2024-05-12 13:46:31,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5407, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5646, PETRI_PLACES=270, PETRI_TRANSITIONS=421} [2024-05-12 13:46:31,718 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 215 predicate places. [2024-05-12 13:46:31,718 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 421 transitions, 5646 flow [2024-05-12 13:46:31,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 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 13:46:31,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:46:31,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:46:31,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-05-12 13:46:31,718 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 13:46:31,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:46:31,719 INFO L85 PathProgramCache]: Analyzing trace with hash 454663080, now seen corresponding path program 8 times [2024-05-12 13:46:31,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:46:31,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280147951] [2024-05-12 13:46:31,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:46:31,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:46:31,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:46:32,968 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 13:46:32,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:46:32,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280147951] [2024-05-12 13:46:32,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280147951] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:46:32,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:46:32,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:46:32,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727474355] [2024-05-12 13:46:32,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:46:32,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:46:32,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:46:32,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:46:32,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:46:33,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:46:33,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 421 transitions, 5646 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 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 13:46:33,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:46:33,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:46:33,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:46:35,780 INFO L124 PetriNetUnfolderBase]: 7880/12643 cut-off events. [2024-05-12 13:46:35,781 INFO L125 PetriNetUnfolderBase]: For 521752/521752 co-relation queries the response was YES. [2024-05-12 13:46:35,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86903 conditions, 12643 events. 7880/12643 cut-off events. For 521752/521752 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 86109 event pairs, 2074 based on Foata normal form. 20/12304 useless extension candidates. Maximal degree in co-relation 86771. Up to 10273 conditions per place. [2024-05-12 13:46:35,912 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 391 selfloop transitions, 89 changer transitions 0/489 dead transitions. [2024-05-12 13:46:35,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 489 transitions, 7080 flow [2024-05-12 13:46:35,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:46:35,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:46:35,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-05-12 13:46:35,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5328798185941043 [2024-05-12 13:46:35,914 INFO L175 Difference]: Start difference. First operand has 270 places, 421 transitions, 5646 flow. Second operand 9 states and 235 transitions. [2024-05-12 13:46:35,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 489 transitions, 7080 flow [2024-05-12 13:46:36,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 489 transitions, 6867 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-05-12 13:46:36,827 INFO L231 Difference]: Finished difference. Result has 272 places, 422 transitions, 5666 flow [2024-05-12 13:46:36,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5433, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5666, PETRI_PLACES=272, PETRI_TRANSITIONS=422} [2024-05-12 13:46:36,828 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 217 predicate places. [2024-05-12 13:46:36,828 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 422 transitions, 5666 flow [2024-05-12 13:46:36,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 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 13:46:36,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:46:36,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:46:36,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-05-12 13:46:36,828 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 13:46:36,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:46:36,829 INFO L85 PathProgramCache]: Analyzing trace with hash -2129583542, now seen corresponding path program 9 times [2024-05-12 13:46:36,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:46:36,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854394684] [2024-05-12 13:46:36,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:46:36,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:46:36,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:46:38,209 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 13:46:38,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:46:38,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854394684] [2024-05-12 13:46:38,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854394684] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:46:38,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:46:38,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:46:38,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027142389] [2024-05-12 13:46:38,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:46:38,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:46:38,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:46:38,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:46:38,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:46:38,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:46:38,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 422 transitions, 5666 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 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 13:46:38,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:46:38,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:46:38,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:46:41,014 INFO L124 PetriNetUnfolderBase]: 8154/13021 cut-off events. [2024-05-12 13:46:41,015 INFO L125 PetriNetUnfolderBase]: For 558546/558546 co-relation queries the response was YES. [2024-05-12 13:46:41,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90660 conditions, 13021 events. 8154/13021 cut-off events. For 558546/558546 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 88518 event pairs, 2062 based on Foata normal form. 16/12692 useless extension candidates. Maximal degree in co-relation 90527. Up to 9865 conditions per place. [2024-05-12 13:46:41,181 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 394 selfloop transitions, 95 changer transitions 0/498 dead transitions. [2024-05-12 13:46:41,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 498 transitions, 7402 flow [2024-05-12 13:46:41,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:46:41,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:46:41,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-05-12 13:46:41,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54421768707483 [2024-05-12 13:46:41,182 INFO L175 Difference]: Start difference. First operand has 272 places, 422 transitions, 5666 flow. Second operand 9 states and 240 transitions. [2024-05-12 13:46:41,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 498 transitions, 7402 flow [2024-05-12 13:46:42,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 498 transitions, 7195 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-05-12 13:46:42,324 INFO L231 Difference]: Finished difference. Result has 274 places, 424 transitions, 5753 flow [2024-05-12 13:46:42,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5459, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5753, PETRI_PLACES=274, PETRI_TRANSITIONS=424} [2024-05-12 13:46:42,324 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 219 predicate places. [2024-05-12 13:46:42,324 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 424 transitions, 5753 flow [2024-05-12 13:46:42,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 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 13:46:42,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:46:42,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:46:42,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-05-12 13:46:42,325 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:46:42,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:46:42,325 INFO L85 PathProgramCache]: Analyzing trace with hash -2129405912, now seen corresponding path program 10 times [2024-05-12 13:46:42,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:46:42,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191782448] [2024-05-12 13:46:42,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:46:42,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:46:42,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:46:43,592 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 13:46:43,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:46:43,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191782448] [2024-05-12 13:46:43,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191782448] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:46:43,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:46:43,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:46:43,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489976552] [2024-05-12 13:46:43,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:46:43,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:46:43,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:46:43,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:46:43,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:46:43,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:46:43,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 424 transitions, 5753 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 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 13:46:43,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:46:43,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:46:43,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:46:46,414 INFO L124 PetriNetUnfolderBase]: 8118/13055 cut-off events. [2024-05-12 13:46:46,414 INFO L125 PetriNetUnfolderBase]: For 538304/538304 co-relation queries the response was YES. [2024-05-12 13:46:46,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88802 conditions, 13055 events. 8118/13055 cut-off events. For 538304/538304 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 89622 event pairs, 2150 based on Foata normal form. 20/12700 useless extension candidates. Maximal degree in co-relation 88668. Up to 10643 conditions per place. [2024-05-12 13:46:46,576 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 392 selfloop transitions, 91 changer transitions 0/492 dead transitions. [2024-05-12 13:46:46,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 492 transitions, 7153 flow [2024-05-12 13:46:46,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:46:46,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:46:46,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-05-12 13:46:46,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5328798185941043 [2024-05-12 13:46:46,578 INFO L175 Difference]: Start difference. First operand has 274 places, 424 transitions, 5753 flow. Second operand 9 states and 235 transitions. [2024-05-12 13:46:46,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 492 transitions, 7153 flow [2024-05-12 13:46:47,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 492 transitions, 6973 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-05-12 13:46:47,932 INFO L231 Difference]: Finished difference. Result has 278 places, 424 transitions, 5762 flow [2024-05-12 13:46:47,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5573, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5762, PETRI_PLACES=278, PETRI_TRANSITIONS=424} [2024-05-12 13:46:47,933 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 223 predicate places. [2024-05-12 13:46:47,933 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 424 transitions, 5762 flow [2024-05-12 13:46:47,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 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 13:46:47,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:46:47,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:46:47,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-05-12 13:46:47,933 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:46:47,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:46:47,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1892926938, now seen corresponding path program 2 times [2024-05-12 13:46:47,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:46:47,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466289317] [2024-05-12 13:46:47,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:46:47,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:46:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:46:49,511 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 13:46:49,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:46:49,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466289317] [2024-05-12 13:46:49,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466289317] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:46:49,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:46:49,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:46:49,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799524087] [2024-05-12 13:46:49,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:46:49,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:46:49,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:46:49,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:46:49,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:46:49,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:46:49,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 424 transitions, 5762 flow. Second operand has 11 states, 11 states have (on average 13.454545454545455) internal successors, (148), 11 states have internal predecessors, (148), 0 states have call successors, (0), 0 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 13:46:49,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:46:49,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:46:49,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:46:52,341 INFO L124 PetriNetUnfolderBase]: 8224/13205 cut-off events. [2024-05-12 13:46:52,342 INFO L125 PetriNetUnfolderBase]: For 520353/520353 co-relation queries the response was YES. [2024-05-12 13:46:52,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89299 conditions, 13205 events. 8224/13205 cut-off events. For 520353/520353 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 90740 event pairs, 2148 based on Foata normal form. 12/12854 useless extension candidates. Maximal degree in co-relation 89163. Up to 10377 conditions per place. [2024-05-12 13:46:52,514 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 393 selfloop transitions, 92 changer transitions 0/494 dead transitions. [2024-05-12 13:46:52,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 494 transitions, 7232 flow [2024-05-12 13:46:52,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:46:52,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:46:52,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-05-12 13:46:52,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5351473922902494 [2024-05-12 13:46:52,516 INFO L175 Difference]: Start difference. First operand has 278 places, 424 transitions, 5762 flow. Second operand 9 states and 236 transitions. [2024-05-12 13:46:52,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 494 transitions, 7232 flow [2024-05-12 13:46:53,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 494 transitions, 7035 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-05-12 13:46:53,640 INFO L231 Difference]: Finished difference. Result has 279 places, 425 transitions, 5807 flow [2024-05-12 13:46:53,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5565, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5807, PETRI_PLACES=279, PETRI_TRANSITIONS=425} [2024-05-12 13:46:53,641 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 224 predicate places. [2024-05-12 13:46:53,641 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 425 transitions, 5807 flow [2024-05-12 13:46:53,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.454545454545455) internal successors, (148), 11 states have internal predecessors, (148), 0 states have call successors, (0), 0 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 13:46:53,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:46:53,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:46:53,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-05-12 13:46:53,642 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:46:53,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:46:53,642 INFO L85 PathProgramCache]: Analyzing trace with hash -995243448, now seen corresponding path program 3 times [2024-05-12 13:46:53,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:46:53,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669668010] [2024-05-12 13:46:53,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:46:53,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:46:53,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:46:55,300 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 13:46:55,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:46:55,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669668010] [2024-05-12 13:46:55,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669668010] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:46:55,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:46:55,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:46:55,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913505035] [2024-05-12 13:46:55,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:46:55,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:46:55,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:46:55,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:46:55,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:46:55,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:46:55,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 425 transitions, 5807 flow. Second operand has 11 states, 11 states have (on average 13.454545454545455) internal successors, (148), 11 states have internal predecessors, (148), 0 states have call successors, (0), 0 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 13:46:55,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:46:55,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:46:55,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:46:58,108 INFO L124 PetriNetUnfolderBase]: 8330/13442 cut-off events. [2024-05-12 13:46:58,109 INFO L125 PetriNetUnfolderBase]: For 545018/545018 co-relation queries the response was YES. [2024-05-12 13:46:58,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91134 conditions, 13442 events. 8330/13442 cut-off events. For 545018/545018 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 93271 event pairs, 2212 based on Foata normal form. 12/13072 useless extension candidates. Maximal degree in co-relation 90997. Up to 10793 conditions per place. [2024-05-12 13:46:58,289 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 389 selfloop transitions, 95 changer transitions 0/493 dead transitions. [2024-05-12 13:46:58,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 493 transitions, 7269 flow [2024-05-12 13:46:58,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:46:58,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:46:58,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-05-12 13:46:58,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.528344671201814 [2024-05-12 13:46:58,291 INFO L175 Difference]: Start difference. First operand has 279 places, 425 transitions, 5807 flow. Second operand 9 states and 233 transitions. [2024-05-12 13:46:58,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 493 transitions, 7269 flow [2024-05-12 13:46:59,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 493 transitions, 7049 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-05-12 13:46:59,701 INFO L231 Difference]: Finished difference. Result has 281 places, 426 transitions, 5837 flow [2024-05-12 13:46:59,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5587, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5837, PETRI_PLACES=281, PETRI_TRANSITIONS=426} [2024-05-12 13:46:59,702 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 226 predicate places. [2024-05-12 13:46:59,702 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 426 transitions, 5837 flow [2024-05-12 13:46:59,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.454545454545455) internal successors, (148), 11 states have internal predecessors, (148), 0 states have call successors, (0), 0 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 13:46:59,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:46:59,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:46:59,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-05-12 13:46:59,702 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:46:59,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:46:59,703 INFO L85 PathProgramCache]: Analyzing trace with hash 407704354, now seen corresponding path program 4 times [2024-05-12 13:46:59,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:46:59,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490256888] [2024-05-12 13:46:59,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:46:59,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:46:59,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:47:01,173 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 13:47:01,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:47:01,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490256888] [2024-05-12 13:47:01,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490256888] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:47:01,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:47:01,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:47:01,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28479895] [2024-05-12 13:47:01,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:47:01,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:47:01,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:47:01,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:47:01,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:47:01,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:47:01,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 426 transitions, 5837 flow. Second operand has 11 states, 11 states have (on average 13.454545454545455) internal successors, (148), 11 states have internal predecessors, (148), 0 states have call successors, (0), 0 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 13:47:01,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:47:01,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:47:01,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:47:04,074 INFO L124 PetriNetUnfolderBase]: 8310/13209 cut-off events. [2024-05-12 13:47:04,075 INFO L125 PetriNetUnfolderBase]: For 527135/527135 co-relation queries the response was YES. [2024-05-12 13:47:04,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89464 conditions, 13209 events. 8310/13209 cut-off events. For 527135/527135 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 89689 event pairs, 1898 based on Foata normal form. 12/12914 useless extension candidates. Maximal degree in co-relation 89326. Up to 8912 conditions per place. [2024-05-12 13:47:04,239 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 378 selfloop transitions, 105 changer transitions 0/492 dead transitions. [2024-05-12 13:47:04,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 492 transitions, 7161 flow [2024-05-12 13:47:04,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:47:04,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:47:04,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-05-12 13:47:04,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-05-12 13:47:04,240 INFO L175 Difference]: Start difference. First operand has 281 places, 426 transitions, 5837 flow. Second operand 9 states and 231 transitions. [2024-05-12 13:47:04,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 492 transitions, 7161 flow [2024-05-12 13:47:05,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 492 transitions, 6933 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-05-12 13:47:05,448 INFO L231 Difference]: Finished difference. Result has 282 places, 425 transitions, 5739 flow [2024-05-12 13:47:05,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5525, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5739, PETRI_PLACES=282, PETRI_TRANSITIONS=425} [2024-05-12 13:47:05,449 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 227 predicate places. [2024-05-12 13:47:05,449 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 425 transitions, 5739 flow [2024-05-12 13:47:05,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.454545454545455) internal successors, (148), 11 states have internal predecessors, (148), 0 states have call successors, (0), 0 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 13:47:05,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:47:05,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:47:05,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-05-12 13:47:05,449 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:47:05,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:47:05,450 INFO L85 PathProgramCache]: Analyzing trace with hash -634646686, now seen corresponding path program 2 times [2024-05-12 13:47:05,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:47:05,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634620072] [2024-05-12 13:47:05,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:47:05,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:47:05,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:47:06,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:47:06,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:47:06,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634620072] [2024-05-12 13:47:06,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634620072] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:47:06,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:47:06,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:47:06,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193261728] [2024-05-12 13:47:06,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:47:06,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:47:06,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:47:06,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:47:06,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:47:06,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:47:06,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 425 transitions, 5739 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 13:47:06,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:47:06,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:47:06,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:47:09,083 INFO L124 PetriNetUnfolderBase]: 8307/13263 cut-off events. [2024-05-12 13:47:09,084 INFO L125 PetriNetUnfolderBase]: For 512701/512701 co-relation queries the response was YES. [2024-05-12 13:47:09,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89323 conditions, 13263 events. 8307/13263 cut-off events. For 512701/512701 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 91232 event pairs, 2740 based on Foata normal form. 1/12933 useless extension candidates. Maximal degree in co-relation 89184. Up to 11841 conditions per place. [2024-05-12 13:47:09,234 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 380 selfloop transitions, 63 changer transitions 0/452 dead transitions. [2024-05-12 13:47:09,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 452 transitions, 6725 flow [2024-05-12 13:47:09,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:47:09,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:47:09,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-05-12 13:47:09,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2024-05-12 13:47:09,236 INFO L175 Difference]: Start difference. First operand has 282 places, 425 transitions, 5739 flow. Second operand 7 states and 168 transitions. [2024-05-12 13:47:09,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 452 transitions, 6725 flow [2024-05-12 13:47:10,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 452 transitions, 6287 flow, removed 38 selfloop flow, removed 10 redundant places. [2024-05-12 13:47:10,183 INFO L231 Difference]: Finished difference. Result has 279 places, 425 transitions, 5439 flow [2024-05-12 13:47:10,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5301, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5439, PETRI_PLACES=279, PETRI_TRANSITIONS=425} [2024-05-12 13:47:10,183 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 224 predicate places. [2024-05-12 13:47:10,183 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 425 transitions, 5439 flow [2024-05-12 13:47:10,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 13:47:10,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:47:10,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:47:10,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-05-12 13:47:10,184 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:47:10,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:47:10,184 INFO L85 PathProgramCache]: Analyzing trace with hash -364783936, now seen corresponding path program 3 times [2024-05-12 13:47:10,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:47:10,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301146174] [2024-05-12 13:47:10,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:47:10,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:47:10,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:47:11,120 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 13:47:11,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:47:11,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301146174] [2024-05-12 13:47:11,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301146174] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:47:11,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:47:11,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:47:11,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760895831] [2024-05-12 13:47:11,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:47:11,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:47:11,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:47:11,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:47:11,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:47:11,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:47:11,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 425 transitions, 5439 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 13:47:11,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:47:11,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:47:11,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:47:14,003 INFO L124 PetriNetUnfolderBase]: 8297/13249 cut-off events. [2024-05-12 13:47:14,004 INFO L125 PetriNetUnfolderBase]: For 502279/502279 co-relation queries the response was YES. [2024-05-12 13:47:14,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85387 conditions, 13249 events. 8297/13249 cut-off events. For 502279/502279 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 91102 event pairs, 2719 based on Foata normal form. 2/12922 useless extension candidates. Maximal degree in co-relation 85250. Up to 11593 conditions per place. [2024-05-12 13:47:14,194 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 355 selfloop transitions, 101 changer transitions 0/465 dead transitions. [2024-05-12 13:47:14,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 465 transitions, 6651 flow [2024-05-12 13:47:14,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:47:14,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:47:14,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-05-12 13:47:14,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4839650145772595 [2024-05-12 13:47:14,196 INFO L175 Difference]: Start difference. First operand has 279 places, 425 transitions, 5439 flow. Second operand 7 states and 166 transitions. [2024-05-12 13:47:14,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 465 transitions, 6651 flow [2024-05-12 13:47:15,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 465 transitions, 6430 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-05-12 13:47:15,403 INFO L231 Difference]: Finished difference. Result has 278 places, 437 transitions, 5673 flow [2024-05-12 13:47:15,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5220, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5673, PETRI_PLACES=278, PETRI_TRANSITIONS=437} [2024-05-12 13:47:15,404 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 223 predicate places. [2024-05-12 13:47:15,404 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 437 transitions, 5673 flow [2024-05-12 13:47:15,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 13:47:15,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:47:15,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:47:15,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-05-12 13:47:15,404 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:47:15,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:47:15,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1174634834, now seen corresponding path program 1 times [2024-05-12 13:47:15,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:47:15,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877471328] [2024-05-12 13:47:15,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:47:15,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:47:15,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:47:16,255 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 13:47:16,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:47:16,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877471328] [2024-05-12 13:47:16,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877471328] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:47:16,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:47:16,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:47:16,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615244542] [2024-05-12 13:47:16,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:47:16,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:47:16,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:47:16,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:47:16,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:47:16,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:47:16,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 437 transitions, 5673 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 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 13:47:16,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:47:16,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:47:16,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:47:18,814 INFO L124 PetriNetUnfolderBase]: 8420/13448 cut-off events. [2024-05-12 13:47:18,815 INFO L125 PetriNetUnfolderBase]: For 522045/522047 co-relation queries the response was YES. [2024-05-12 13:47:18,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86880 conditions, 13448 events. 8420/13448 cut-off events. For 522045/522047 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 92655 event pairs, 2680 based on Foata normal form. 8/13128 useless extension candidates. Maximal degree in co-relation 86745. Up to 11319 conditions per place. [2024-05-12 13:47:18,989 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 321 selfloop transitions, 152 changer transitions 0/482 dead transitions. [2024-05-12 13:47:18,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 482 transitions, 7021 flow [2024-05-12 13:47:18,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:47:18,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:47:18,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-05-12 13:47:18,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4846938775510204 [2024-05-12 13:47:18,991 INFO L175 Difference]: Start difference. First operand has 278 places, 437 transitions, 5673 flow. Second operand 8 states and 190 transitions. [2024-05-12 13:47:18,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 482 transitions, 7021 flow [2024-05-12 13:47:19,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 482 transitions, 6852 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-05-12 13:47:19,921 INFO L231 Difference]: Finished difference. Result has 282 places, 450 transitions, 6084 flow [2024-05-12 13:47:19,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5504, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6084, PETRI_PLACES=282, PETRI_TRANSITIONS=450} [2024-05-12 13:47:19,922 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 227 predicate places. [2024-05-12 13:47:19,922 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 450 transitions, 6084 flow [2024-05-12 13:47:19,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 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 13:47:19,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:47:19,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:47:19,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-05-12 13:47:19,923 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:47:19,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:47:19,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1191212084, now seen corresponding path program 2 times [2024-05-12 13:47:19,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:47:19,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843195782] [2024-05-12 13:47:19,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:47:19,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:47:19,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:47:20,723 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 13:47:20,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:47:20,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843195782] [2024-05-12 13:47:20,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843195782] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:47:20,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:47:20,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:47:20,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722384020] [2024-05-12 13:47:20,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:47:20,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:47:20,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:47:20,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:47:20,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:47:20,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:47:20,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 450 transitions, 6084 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 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 13:47:20,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:47:20,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:47:20,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:47:23,396 INFO L124 PetriNetUnfolderBase]: 8489/13519 cut-off events. [2024-05-12 13:47:23,397 INFO L125 PetriNetUnfolderBase]: For 545061/545063 co-relation queries the response was YES. [2024-05-12 13:47:23,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89264 conditions, 13519 events. 8489/13519 cut-off events. For 545061/545063 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 92930 event pairs, 2730 based on Foata normal form. 8/13202 useless extension candidates. Maximal degree in co-relation 89128. Up to 11263 conditions per place. [2024-05-12 13:47:23,584 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 325 selfloop transitions, 152 changer transitions 0/486 dead transitions. [2024-05-12 13:47:23,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 486 transitions, 7334 flow [2024-05-12 13:47:23,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:47:23,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:47:23,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-05-12 13:47:23,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4846938775510204 [2024-05-12 13:47:23,586 INFO L175 Difference]: Start difference. First operand has 282 places, 450 transitions, 6084 flow. Second operand 8 states and 190 transitions. [2024-05-12 13:47:23,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 486 transitions, 7334 flow [2024-05-12 13:47:24,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 486 transitions, 6810 flow, removed 96 selfloop flow, removed 5 redundant places. [2024-05-12 13:47:24,556 INFO L231 Difference]: Finished difference. Result has 286 places, 455 transitions, 6035 flow [2024-05-12 13:47:24,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5570, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6035, PETRI_PLACES=286, PETRI_TRANSITIONS=455} [2024-05-12 13:47:24,557 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 231 predicate places. [2024-05-12 13:47:24,557 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 455 transitions, 6035 flow [2024-05-12 13:47:24,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 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 13:47:24,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:47:24,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:47:24,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-05-12 13:47:24,558 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:47:24,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:47:24,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1191776594, now seen corresponding path program 3 times [2024-05-12 13:47:24,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:47:24,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146733118] [2024-05-12 13:47:24,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:47:24,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:47:24,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:47:25,508 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 13:47:25,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:47:25,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146733118] [2024-05-12 13:47:25,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146733118] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:47:25,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:47:25,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:47:25,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825632359] [2024-05-12 13:47:25,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:47:25,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:47:25,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:47:25,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:47:25,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:47:25,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:47:25,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 455 transitions, 6035 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 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 13:47:25,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:47:25,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:47:25,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:47:28,147 INFO L124 PetriNetUnfolderBase]: 8727/13881 cut-off events. [2024-05-12 13:47:28,147 INFO L125 PetriNetUnfolderBase]: For 592509/592509 co-relation queries the response was YES. [2024-05-12 13:47:28,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93460 conditions, 13881 events. 8727/13881 cut-off events. For 592509/592509 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 95699 event pairs, 2719 based on Foata normal form. 2/13555 useless extension candidates. Maximal degree in co-relation 93322. Up to 11802 conditions per place. [2024-05-12 13:47:28,332 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 435 selfloop transitions, 69 changer transitions 0/513 dead transitions. [2024-05-12 13:47:28,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 513 transitions, 7832 flow [2024-05-12 13:47:28,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:47:28,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:47:28,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-05-12 13:47:28,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4872448979591837 [2024-05-12 13:47:28,333 INFO L175 Difference]: Start difference. First operand has 286 places, 455 transitions, 6035 flow. Second operand 8 states and 191 transitions. [2024-05-12 13:47:28,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 513 transitions, 7832 flow [2024-05-12 13:47:29,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 513 transitions, 7316 flow, removed 106 selfloop flow, removed 5 redundant places. [2024-05-12 13:47:29,497 INFO L231 Difference]: Finished difference. Result has 290 places, 467 transitions, 6008 flow [2024-05-12 13:47:29,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5614, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6008, PETRI_PLACES=290, PETRI_TRANSITIONS=467} [2024-05-12 13:47:29,498 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 235 predicate places. [2024-05-12 13:47:29,498 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 467 transitions, 6008 flow [2024-05-12 13:47:29,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 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 13:47:29,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:47:29,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:47:29,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-05-12 13:47:29,498 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:47:29,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:47:29,499 INFO L85 PathProgramCache]: Analyzing trace with hash -368521730, now seen corresponding path program 1 times [2024-05-12 13:47:29,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:47:29,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193428958] [2024-05-12 13:47:29,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:47:29,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:47:29,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:47:30,620 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 13:47:30,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:47:30,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193428958] [2024-05-12 13:47:30,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193428958] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:47:30,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:47:30,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:47:30,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449771439] [2024-05-12 13:47:30,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:47:30,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:47:30,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:47:30,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:47:30,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:47:30,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:47:30,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 467 transitions, 6008 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 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 13:47:30,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:47:30,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:47:30,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:47:33,352 INFO L124 PetriNetUnfolderBase]: 8971/14339 cut-off events. [2024-05-12 13:47:33,352 INFO L125 PetriNetUnfolderBase]: For 637048/637048 co-relation queries the response was YES. [2024-05-12 13:47:33,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97203 conditions, 14339 events. 8971/14339 cut-off events. For 637048/637048 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 99927 event pairs, 2564 based on Foata normal form. 4/13975 useless extension candidates. Maximal degree in co-relation 97063. Up to 12289 conditions per place. [2024-05-12 13:47:33,536 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 431 selfloop transitions, 96 changer transitions 0/536 dead transitions. [2024-05-12 13:47:33,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 536 transitions, 7788 flow [2024-05-12 13:47:33,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:47:33,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:47:33,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-05-12 13:47:33,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5127551020408163 [2024-05-12 13:47:33,538 INFO L175 Difference]: Start difference. First operand has 290 places, 467 transitions, 6008 flow. Second operand 8 states and 201 transitions. [2024-05-12 13:47:33,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 536 transitions, 7788 flow [2024-05-12 13:47:34,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 536 transitions, 7627 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-05-12 13:47:34,865 INFO L231 Difference]: Finished difference. Result has 297 places, 491 transitions, 6436 flow [2024-05-12 13:47:34,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5847, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6436, PETRI_PLACES=297, PETRI_TRANSITIONS=491} [2024-05-12 13:47:34,866 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 242 predicate places. [2024-05-12 13:47:34,866 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 491 transitions, 6436 flow [2024-05-12 13:47:34,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 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 13:47:34,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:47:34,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:47:34,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-05-12 13:47:34,866 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:47:34,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:47:34,867 INFO L85 PathProgramCache]: Analyzing trace with hash -364773830, now seen corresponding path program 2 times [2024-05-12 13:47:34,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:47:34,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184847665] [2024-05-12 13:47:34,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:47:34,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:47:34,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:47:35,976 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 13:47:35,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:47:35,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184847665] [2024-05-12 13:47:35,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184847665] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:47:35,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:47:35,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:47:35,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341036893] [2024-05-12 13:47:35,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:47:35,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:47:35,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:47:35,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:47:35,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:47:36,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:47:36,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 491 transitions, 6436 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 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 13:47:36,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:47:36,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:47:36,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:47:39,102 INFO L124 PetriNetUnfolderBase]: 9313/14839 cut-off events. [2024-05-12 13:47:39,102 INFO L125 PetriNetUnfolderBase]: For 691209/691209 co-relation queries the response was YES. [2024-05-12 13:47:39,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104200 conditions, 14839 events. 9313/14839 cut-off events. For 691209/691209 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 103511 event pairs, 2599 based on Foata normal form. 4/14464 useless extension candidates. Maximal degree in co-relation 104055. Up to 12169 conditions per place. [2024-05-12 13:47:39,333 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 425 selfloop transitions, 142 changer transitions 0/576 dead transitions. [2024-05-12 13:47:39,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 576 transitions, 8910 flow [2024-05-12 13:47:39,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:47:39,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:47:39,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-05-12 13:47:39,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5204081632653061 [2024-05-12 13:47:39,334 INFO L175 Difference]: Start difference. First operand has 297 places, 491 transitions, 6436 flow. Second operand 8 states and 204 transitions. [2024-05-12 13:47:39,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 576 transitions, 8910 flow [2024-05-12 13:47:40,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 576 transitions, 8764 flow, removed 72 selfloop flow, removed 1 redundant places. [2024-05-12 13:47:40,961 INFO L231 Difference]: Finished difference. Result has 307 places, 522 transitions, 7325 flow [2024-05-12 13:47:40,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6358, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7325, PETRI_PLACES=307, PETRI_TRANSITIONS=522} [2024-05-12 13:47:40,961 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 252 predicate places. [2024-05-12 13:47:40,961 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 522 transitions, 7325 flow [2024-05-12 13:47:40,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 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 13:47:40,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:47:40,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:47:40,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-05-12 13:47:40,962 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:47:40,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:47:40,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1176674890, now seen corresponding path program 3 times [2024-05-12 13:47:40,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:47:40,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424774062] [2024-05-12 13:47:40,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:47:40,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:47:40,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:47:42,049 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 13:47:42,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:47:42,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424774062] [2024-05-12 13:47:42,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424774062] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:47:42,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:47:42,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:47:42,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357089310] [2024-05-12 13:47:42,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:47:42,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:47:42,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:47:42,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:47:42,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:47:42,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:47:42,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 522 transitions, 7325 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 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 13:47:42,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:47:42,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:47:42,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:47:45,611 INFO L124 PetriNetUnfolderBase]: 9357/14909 cut-off events. [2024-05-12 13:47:45,612 INFO L125 PetriNetUnfolderBase]: For 720653/720653 co-relation queries the response was YES. [2024-05-12 13:47:45,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107471 conditions, 14909 events. 9357/14909 cut-off events. For 720653/720653 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 104163 event pairs, 2587 based on Foata normal form. 4/14532 useless extension candidates. Maximal degree in co-relation 107320. Up to 12209 conditions per place. [2024-05-12 13:47:45,809 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 418 selfloop transitions, 155 changer transitions 0/582 dead transitions. [2024-05-12 13:47:45,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 582 transitions, 9245 flow [2024-05-12 13:47:45,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:47:45,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:47:45,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-05-12 13:47:45,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5204081632653061 [2024-05-12 13:47:45,810 INFO L175 Difference]: Start difference. First operand has 307 places, 522 transitions, 7325 flow. Second operand 8 states and 204 transitions. [2024-05-12 13:47:45,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 582 transitions, 9245 flow [2024-05-12 13:47:47,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 582 transitions, 9085 flow, removed 79 selfloop flow, removed 1 redundant places. [2024-05-12 13:47:47,841 INFO L231 Difference]: Finished difference. Result has 316 places, 533 transitions, 7862 flow [2024-05-12 13:47:47,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7205, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7862, PETRI_PLACES=316, PETRI_TRANSITIONS=533} [2024-05-12 13:47:47,842 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 261 predicate places. [2024-05-12 13:47:47,842 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 533 transitions, 7862 flow [2024-05-12 13:47:47,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 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 13:47:47,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:47:47,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:47:47,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-05-12 13:47:47,843 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:47:47,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:47:47,843 INFO L85 PathProgramCache]: Analyzing trace with hash -219743492, now seen corresponding path program 1 times [2024-05-12 13:47:47,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:47:47,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379493413] [2024-05-12 13:47:47,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:47:47,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:47:47,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:47:48,817 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 13:47:48,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:47:48,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379493413] [2024-05-12 13:47:48,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379493413] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:47:48,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:47:48,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:47:48,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432491160] [2024-05-12 13:47:48,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:47:48,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:47:48,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:47:48,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:47:48,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:47:48,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:47:48,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 533 transitions, 7862 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 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 13:47:48,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:47:48,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:47:48,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:47:52,686 INFO L124 PetriNetUnfolderBase]: 9517/15087 cut-off events. [2024-05-12 13:47:52,686 INFO L125 PetriNetUnfolderBase]: For 754232/754232 co-relation queries the response was YES. [2024-05-12 13:47:52,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110535 conditions, 15087 events. 9517/15087 cut-off events. For 754232/754232 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 104937 event pairs, 2895 based on Foata normal form. 8/14735 useless extension candidates. Maximal degree in co-relation 110379. Up to 13242 conditions per place. [2024-05-12 13:47:52,874 INFO L140 encePairwiseOnDemand]: 35/49 looper letters, 487 selfloop transitions, 83 changer transitions 0/579 dead transitions. [2024-05-12 13:47:52,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 579 transitions, 9369 flow [2024-05-12 13:47:52,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:47:52,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:47:52,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-05-12 13:47:52,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47845804988662133 [2024-05-12 13:47:52,875 INFO L175 Difference]: Start difference. First operand has 316 places, 533 transitions, 7862 flow. Second operand 9 states and 211 transitions. [2024-05-12 13:47:52,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 579 transitions, 9369 flow [2024-05-12 13:47:54,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 579 transitions, 9166 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-05-12 13:47:54,913 INFO L231 Difference]: Finished difference. Result has 323 places, 542 transitions, 8049 flow [2024-05-12 13:47:54,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7659, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8049, PETRI_PLACES=323, PETRI_TRANSITIONS=542} [2024-05-12 13:47:54,914 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 268 predicate places. [2024-05-12 13:47:54,914 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 542 transitions, 8049 flow [2024-05-12 13:47:54,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 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 13:47:54,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:47:54,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:47:54,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-05-12 13:47:54,914 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:47:54,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:47:54,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1061467762, now seen corresponding path program 4 times [2024-05-12 13:47:54,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:47:54,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755633932] [2024-05-12 13:47:54,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:47:54,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:47:54,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:47:56,145 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 13:47:56,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:47:56,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755633932] [2024-05-12 13:47:56,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755633932] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:47:56,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:47:56,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:47:56,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71963768] [2024-05-12 13:47:56,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:47:56,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:47:56,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:47:56,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:47:56,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:47:56,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:47:56,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 542 transitions, 8049 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 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 13:47:56,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:47:56,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:47:56,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:48:00,231 INFO L124 PetriNetUnfolderBase]: 9899/15916 cut-off events. [2024-05-12 13:48:00,231 INFO L125 PetriNetUnfolderBase]: For 825071/825073 co-relation queries the response was YES. [2024-05-12 13:48:00,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118150 conditions, 15916 events. 9899/15916 cut-off events. For 825071/825073 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 113029 event pairs, 2679 based on Foata normal form. 4/15456 useless extension candidates. Maximal degree in co-relation 117991. Up to 11080 conditions per place. [2024-05-12 13:48:00,427 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 424 selfloop transitions, 193 changer transitions 0/626 dead transitions. [2024-05-12 13:48:00,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 626 transitions, 10872 flow [2024-05-12 13:48:00,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:48:00,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:48:00,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-05-12 13:48:00,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5280612244897959 [2024-05-12 13:48:00,429 INFO L175 Difference]: Start difference. First operand has 323 places, 542 transitions, 8049 flow. Second operand 8 states and 207 transitions. [2024-05-12 13:48:00,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 626 transitions, 10872 flow [2024-05-12 13:48:02,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 626 transitions, 10577 flow, removed 70 selfloop flow, removed 6 redundant places. [2024-05-12 13:48:02,260 INFO L231 Difference]: Finished difference. Result has 328 places, 569 transitions, 8927 flow [2024-05-12 13:48:02,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7754, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8927, PETRI_PLACES=328, PETRI_TRANSITIONS=569} [2024-05-12 13:48:02,261 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 273 predicate places. [2024-05-12 13:48:02,261 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 569 transitions, 8927 flow [2024-05-12 13:48:02,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 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 13:48:02,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:48:02,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:48:02,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-05-12 13:48:02,262 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:48:02,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:48:02,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1061228194, now seen corresponding path program 2 times [2024-05-12 13:48:02,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:48:02,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286569927] [2024-05-12 13:48:02,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:48:02,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:48:02,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:48:03,230 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 13:48:03,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:48:03,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286569927] [2024-05-12 13:48:03,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286569927] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:48:03,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:48:03,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:48:03,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269345413] [2024-05-12 13:48:03,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:48:03,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:48:03,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:48:03,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:48:03,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:48:03,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:48:03,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 569 transitions, 8927 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 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 13:48:03,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:48:03,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:48:03,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:48:07,546 INFO L124 PetriNetUnfolderBase]: 10059/15867 cut-off events. [2024-05-12 13:48:07,546 INFO L125 PetriNetUnfolderBase]: For 885764/885766 co-relation queries the response was YES. [2024-05-12 13:48:07,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123863 conditions, 15867 events. 10059/15867 cut-off events. For 885764/885766 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 110496 event pairs, 2909 based on Foata normal form. 8/15502 useless extension candidates. Maximal degree in co-relation 123700. Up to 13244 conditions per place. [2024-05-12 13:48:07,757 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 430 selfloop transitions, 175 changer transitions 0/614 dead transitions. [2024-05-12 13:48:07,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 614 transitions, 10548 flow [2024-05-12 13:48:07,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:48:07,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:48:07,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-05-12 13:48:07,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-05-12 13:48:07,759 INFO L175 Difference]: Start difference. First operand has 328 places, 569 transitions, 8927 flow. Second operand 9 states and 213 transitions. [2024-05-12 13:48:07,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 614 transitions, 10548 flow [2024-05-12 13:48:10,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 614 transitions, 10305 flow, removed 83 selfloop flow, removed 2 redundant places. [2024-05-12 13:48:10,323 INFO L231 Difference]: Finished difference. Result has 336 places, 578 transitions, 9282 flow [2024-05-12 13:48:10,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=8688, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9282, PETRI_PLACES=336, PETRI_TRANSITIONS=578} [2024-05-12 13:48:10,324 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 281 predicate places. [2024-05-12 13:48:10,324 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 578 transitions, 9282 flow [2024-05-12 13:48:10,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 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 13:48:10,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:48:10,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:48:10,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-05-12 13:48:10,325 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:48:10,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:48:10,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1016584188, now seen corresponding path program 5 times [2024-05-12 13:48:10,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:48:10,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273392409] [2024-05-12 13:48:10,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:48:10,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:48:10,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:48:11,519 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 13:48:11,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:48:11,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273392409] [2024-05-12 13:48:11,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273392409] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:48:11,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:48:11,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:48:11,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10222287] [2024-05-12 13:48:11,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:48:11,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:48:11,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:48:11,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:48:11,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:48:11,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:48:11,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 578 transitions, 9282 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 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 13:48:11,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:48:11,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:48:11,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:48:15,705 INFO L124 PetriNetUnfolderBase]: 10051/16124 cut-off events. [2024-05-12 13:48:15,706 INFO L125 PetriNetUnfolderBase]: For 863118/863120 co-relation queries the response was YES. [2024-05-12 13:48:15,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122825 conditions, 16124 events. 10051/16124 cut-off events. For 863118/863120 co-relation queries the response was YES. Maximal size of possible extension queue 690. Compared 114385 event pairs, 2730 based on Foata normal form. 4/15664 useless extension candidates. Maximal degree in co-relation 122659. Up to 11249 conditions per place. [2024-05-12 13:48:15,944 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 427 selfloop transitions, 203 changer transitions 0/639 dead transitions. [2024-05-12 13:48:15,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 639 transitions, 11614 flow [2024-05-12 13:48:15,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:48:15,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:48:15,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-05-12 13:48:15,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5204081632653061 [2024-05-12 13:48:15,945 INFO L175 Difference]: Start difference. First operand has 336 places, 578 transitions, 9282 flow. Second operand 8 states and 204 transitions. [2024-05-12 13:48:15,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 639 transitions, 11614 flow [2024-05-12 13:48:17,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 639 transitions, 11147 flow, removed 116 selfloop flow, removed 5 redundant places. [2024-05-12 13:48:17,985 INFO L231 Difference]: Finished difference. Result has 341 places, 586 transitions, 9511 flow [2024-05-12 13:48:17,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=8843, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9511, PETRI_PLACES=341, PETRI_TRANSITIONS=586} [2024-05-12 13:48:17,985 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 286 predicate places. [2024-05-12 13:48:17,985 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 586 transitions, 9511 flow [2024-05-12 13:48:17,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 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 13:48:17,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:48:17,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:48:17,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-05-12 13:48:17,986 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:48:17,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:48:17,986 INFO L85 PathProgramCache]: Analyzing trace with hash -766008994, now seen corresponding path program 3 times [2024-05-12 13:48:17,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:48:17,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562986582] [2024-05-12 13:48:17,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:48:17,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:48:17,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:48:18,874 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 13:48:18,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:48:18,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562986582] [2024-05-12 13:48:18,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562986582] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:48:18,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:48:18,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:48:18,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035514037] [2024-05-12 13:48:18,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:48:18,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:48:18,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:48:18,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:48:18,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:48:18,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:48:18,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 586 transitions, 9511 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 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 13:48:18,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:48:18,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:48:18,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand