./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix024_power.opt_pso.opt_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/mix024_power.opt_pso.opt_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/mix024_power.opt_pso.opt_rmo.opt.i ./goblint.2024-05-07_14-17-48.files/protection/mix024_power.opt_pso.opt_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 13:13:38,788 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 13:13:38,850 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 13:13:38,856 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 13:13:38,857 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 13:13:38,885 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 13:13:38,885 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 13:13:38,885 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 13:13:38,886 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 13:13:38,889 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 13:13:38,889 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 13:13:38,889 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 13:13:38,890 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 13:13:38,891 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 13:13:38,891 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 13:13:38,891 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 13:13:38,892 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 13:13:38,892 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 13:13:38,892 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 13:13:38,892 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 13:13:38,892 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 13:13:38,893 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 13:13:38,893 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 13:13:38,893 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 13:13:38,893 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 13:13:38,894 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 13:13:38,894 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 13:13:38,894 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 13:13:38,895 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 13:13:38,895 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 13:13:38,896 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 13:13:38,896 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 13:13:38,896 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 13:13:38,896 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 13:13:38,896 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 13:13:38,896 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 13:13:38,897 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 13:13:38,897 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 13:13:38,897 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 13:13:38,897 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 13:13:38,897 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 13:13:38,898 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 13:13:38,898 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 13:13:38,898 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 13:13:39,075 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 13:13:39,096 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 13:13:39,098 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 13:13:39,099 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 13:13:39,099 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 13:13:39,100 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/protection/mix024_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-05-12 13:13:39,244 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 13:13:39,245 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 13:13:39,245 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix024_power.opt_pso.opt_rmo.opt.i [2024-05-12 13:13:40,247 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 13:13:40,539 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 13:13:40,540 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix024_power.opt_pso.opt_rmo.opt.i [2024-05-12 13:13:40,559 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93b18121c/f09d3e9c24d649ae82b287a4084522b9/FLAGd22363c02 [2024-05-12 13:13:40,577 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93b18121c/f09d3e9c24d649ae82b287a4084522b9 [2024-05-12 13:13:40,578 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 13:13:40,579 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 13:13:40,583 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 13:13:40,583 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 13:13:40,588 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 13:13:40,589 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 01:13:39" (1/2) ... [2024-05-12 13:13:40,590 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62fb72c9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:13:40, skipping insertion in model container [2024-05-12 13:13:40,590 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 01:13:39" (1/2) ... [2024-05-12 13:13:40,591 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2c2ff099 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:13:40, skipping insertion in model container [2024-05-12 13:13:40,592 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 01:13:40" (2/2) ... [2024-05-12 13:13:40,592 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62fb72c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:13:40, skipping insertion in model container [2024-05-12 13:13:40,592 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 01:13:40" (2/2) ... [2024-05-12 13:13:40,593 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 13:13:40,697 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 13:13:40,698 INFO L97 edCorrectnessWitness]: Location invariant before [L850-L850] ((((((((((((((((((((! multithreaded || y$read_delayed == (_Bool)0) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0) [2024-05-12 13:13:40,698 INFO L97 edCorrectnessWitness]: Location invariant before [L847-L847] ((((((((((((((((((((! multithreaded || y$read_delayed == (_Bool)0) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0) [2024-05-12 13:13:40,698 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] ((((((((((((((((((((! multithreaded || y$read_delayed == (_Bool)0) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0) [2024-05-12 13:13:40,699 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 13:13:40,699 INFO L106 edCorrectnessWitness]: ghost_update [L845-L845] multithreaded = 1; [2024-05-12 13:13:40,744 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 13:13:40,880 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/mix024_power.opt_pso.opt_rmo.opt.i[1009,1022] [2024-05-12 13:13:41,053 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 13:13:41,065 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-05-12 13:13:41,098 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/mix024_power.opt_pso.opt_rmo.opt.i[1009,1022] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 13:13:41,238 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 13:13:41,273 INFO L206 MainTranslator]: Completed translation [2024-05-12 13:13:41,274 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:13:41 WrapperNode [2024-05-12 13:13:41,274 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 13:13:41,275 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 13:13:41,275 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 13:13:41,275 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 13:13:41,281 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:13:41" (1/1) ... [2024-05-12 13:13:41,307 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:13:41" (1/1) ... [2024-05-12 13:13:41,346 INFO L138 Inliner]: procedures = 176, calls = 60, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 136 [2024-05-12 13:13:41,346 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 13:13:41,346 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 13:13:41,347 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 13:13:41,347 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 13:13:41,355 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:13:41" (1/1) ... [2024-05-12 13:13:41,356 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:13:41" (1/1) ... [2024-05-12 13:13:41,360 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:13:41" (1/1) ... [2024-05-12 13:13:41,374 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 13:13:41,374 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:13:41" (1/1) ... [2024-05-12 13:13:41,374 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:13:41" (1/1) ... [2024-05-12 13:13:41,387 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:13:41" (1/1) ... [2024-05-12 13:13:41,396 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:13:41" (1/1) ... [2024-05-12 13:13:41,398 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:13:41" (1/1) ... [2024-05-12 13:13:41,400 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:13:41" (1/1) ... [2024-05-12 13:13:41,402 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 13:13:41,404 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 13:13:41,405 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 13:13:41,405 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 13:13:41,405 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:13:41" (1/1) ... [2024-05-12 13:13:41,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 13:13:41,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 13:13:41,436 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 13:13:41,454 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 13:13:41,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 13:13:41,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 13:13:41,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 13:13:41,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-05-12 13:13:41,468 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 13:13:41,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 13:13:41,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 13:13:41,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 13:13:41,468 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-05-12 13:13:41,469 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-05-12 13:13:41,469 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-05-12 13:13:41,469 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-05-12 13:13:41,470 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-05-12 13:13:41,470 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-05-12 13:13:41,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 13:13:41,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 13:13:41,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 13:13:41,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-05-12 13:13:41,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 13:13:41,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 13:13:41,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 13:13:41,473 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 13:13:41,610 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 13:13:41,611 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 13:13:41,908 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 13:13:41,909 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 13:13:42,032 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 13:13:42,032 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-05-12 13:13:42,033 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 01:13:42 BoogieIcfgContainer [2024-05-12 13:13:42,033 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 13:13:42,035 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 13:13:42,035 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 13:13:42,038 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 13:13:42,038 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 01:13:39" (1/4) ... [2024-05-12 13:13:42,039 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@447c9a88 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 01:13:42, skipping insertion in model container [2024-05-12 13:13:42,039 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 01:13:40" (2/4) ... [2024-05-12 13:13:42,039 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@447c9a88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 01:13:42, skipping insertion in model container [2024-05-12 13:13:42,039 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:13:41" (3/4) ... [2024-05-12 13:13:42,040 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@447c9a88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 01:13:42, skipping insertion in model container [2024-05-12 13:13:42,041 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 01:13:42" (4/4) ... [2024-05-12 13:13:42,042 INFO L112 eAbstractionObserver]: Analyzing ICFG mix024_power.opt_pso.opt_rmo.opt.i [2024-05-12 13:13:42,055 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 13:13:42,055 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-05-12 13:13:42,055 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 13:13:42,092 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-05-12 13:13:42,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 50 transitions, 112 flow [2024-05-12 13:13:42,139 INFO L124 PetriNetUnfolderBase]: 1/47 cut-off events. [2024-05-12 13:13:42,139 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 13:13:42,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57 conditions, 47 events. 1/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 88 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2024-05-12 13:13:42,143 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 50 transitions, 112 flow [2024-05-12 13:13:42,145 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 47 transitions, 103 flow [2024-05-12 13:13:42,152 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 13:13:42,157 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;@4cb3537d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 13:13:42,157 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-05-12 13:13:42,161 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 13:13:42,161 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-05-12 13:13:42,161 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 13:13:42,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:42,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 13:13:42,162 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:42,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:42,166 INFO L85 PathProgramCache]: Analyzing trace with hash 2022977380, now seen corresponding path program 1 times [2024-05-12 13:13:42,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:42,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919552057] [2024-05-12 13:13:42,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:42,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:42,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:43,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:43,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919552057] [2024-05-12 13:13:43,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919552057] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:43,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:43,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 13:13:43,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978116580] [2024-05-12 13:13:43,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:43,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 13:13:43,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:43,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 13:13:43,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 13:13:43,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-05-12 13:13:43,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 47 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:43,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:43,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-05-12 13:13:43,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:43,954 INFO L124 PetriNetUnfolderBase]: 3748/6319 cut-off events. [2024-05-12 13:13:43,954 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2024-05-12 13:13:43,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11832 conditions, 6319 events. 3748/6319 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 42781 event pairs, 3067 based on Foata normal form. 169/5893 useless extension candidates. Maximal degree in co-relation 11817. Up to 5396 conditions per place. [2024-05-12 13:13:43,984 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 43 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2024-05-12 13:13:43,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 61 transitions, 233 flow [2024-05-12 13:13:43,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 13:13:43,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 13:13:43,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2024-05-12 13:13:43,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6733333333333333 [2024-05-12 13:13:43,995 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 103 flow. Second operand 3 states and 101 transitions. [2024-05-12 13:13:43,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 61 transitions, 233 flow [2024-05-12 13:13:43,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 61 transitions, 228 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 13:13:43,999 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 135 flow [2024-05-12 13:13:44,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2024-05-12 13:13:44,002 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 0 predicate places. [2024-05-12 13:13:44,003 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 135 flow [2024-05-12 13:13:44,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:44,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:44,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:44,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 13:13:44,004 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:44,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:44,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1538870205, now seen corresponding path program 1 times [2024-05-12 13:13:44,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:44,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685529930] [2024-05-12 13:13:44,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:44,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:44,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:44,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:44,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:44,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685529930] [2024-05-12 13:13:44,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685529930] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:44,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:44,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 13:13:44,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642977747] [2024-05-12 13:13:44,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:44,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 13:13:44,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:44,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 13:13:44,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 13:13:44,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:13:44,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:44,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:44,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:13:44,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:45,499 INFO L124 PetriNetUnfolderBase]: 4489/6812 cut-off events. [2024-05-12 13:13:45,499 INFO L125 PetriNetUnfolderBase]: For 925/925 co-relation queries the response was YES. [2024-05-12 13:13:45,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14846 conditions, 6812 events. 4489/6812 cut-off events. For 925/925 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 41716 event pairs, 2486 based on Foata normal form. 3/6463 useless extension candidates. Maximal degree in co-relation 14831. Up to 6405 conditions per place. [2024-05-12 13:13:45,536 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 55 selfloop transitions, 9 changer transitions 0/76 dead transitions. [2024-05-12 13:13:45,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 76 transitions, 329 flow [2024-05-12 13:13:45,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 13:13:45,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 13:13:45,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-05-12 13:13:45,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.635 [2024-05-12 13:13:45,538 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 135 flow. Second operand 4 states and 127 transitions. [2024-05-12 13:13:45,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 76 transitions, 329 flow [2024-05-12 13:13:45,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 76 transitions, 324 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 13:13:45,540 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 181 flow [2024-05-12 13:13:45,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-05-12 13:13:45,541 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2024-05-12 13:13:45,541 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 181 flow [2024-05-12 13:13:45,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:45,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:45,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:45,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 13:13:45,542 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:45,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:45,543 INFO L85 PathProgramCache]: Analyzing trace with hash -460334391, now seen corresponding path program 1 times [2024-05-12 13:13:45,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:45,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049993354] [2024-05-12 13:13:45,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:45,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:45,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:46,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:46,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:46,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049993354] [2024-05-12 13:13:46,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049993354] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:46,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:46,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 13:13:46,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636654115] [2024-05-12 13:13:46,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:46,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 13:13:46,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:46,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 13:13:46,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 13:13:46,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:13:46,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:46,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:46,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:13:46,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:47,082 INFO L124 PetriNetUnfolderBase]: 5286/8518 cut-off events. [2024-05-12 13:13:47,082 INFO L125 PetriNetUnfolderBase]: For 2889/2889 co-relation queries the response was YES. [2024-05-12 13:13:47,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19521 conditions, 8518 events. 5286/8518 cut-off events. For 2889/2889 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 55872 event pairs, 3002 based on Foata normal form. 3/7918 useless extension candidates. Maximal degree in co-relation 19504. Up to 7502 conditions per place. [2024-05-12 13:13:47,126 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 67 selfloop transitions, 13 changer transitions 0/91 dead transitions. [2024-05-12 13:13:47,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 91 transitions, 439 flow [2024-05-12 13:13:47,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 13:13:47,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 13:13:47,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-05-12 13:13:47,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.612 [2024-05-12 13:13:47,128 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 181 flow. Second operand 5 states and 153 transitions. [2024-05-12 13:13:47,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 91 transitions, 439 flow [2024-05-12 13:13:47,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 91 transitions, 420 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-05-12 13:13:47,131 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 227 flow [2024-05-12 13:13:47,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=227, PETRI_PLACES=62, PETRI_TRANSITIONS=58} [2024-05-12 13:13:47,132 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2024-05-12 13:13:47,132 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 227 flow [2024-05-12 13:13:47,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:47,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:47,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:47,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 13:13:47,133 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:47,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:47,133 INFO L85 PathProgramCache]: Analyzing trace with hash -461560389, now seen corresponding path program 1 times [2024-05-12 13:13:47,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:47,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580997226] [2024-05-12 13:13:47,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:47,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:47,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:47,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:47,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:47,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580997226] [2024-05-12 13:13:47,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580997226] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:47,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:47,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 13:13:47,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015136665] [2024-05-12 13:13:47,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:47,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 13:13:47,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:47,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 13:13:47,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 13:13:47,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 50 [2024-05-12 13:13:47,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 58 transitions, 227 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:47,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:47,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 50 [2024-05-12 13:13:47,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:47,415 INFO L124 PetriNetUnfolderBase]: 1081/2311 cut-off events. [2024-05-12 13:13:47,415 INFO L125 PetriNetUnfolderBase]: For 1163/1361 co-relation queries the response was YES. [2024-05-12 13:13:47,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4851 conditions, 2311 events. 1081/2311 cut-off events. For 1163/1361 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 17812 event pairs, 400 based on Foata normal form. 0/2144 useless extension candidates. Maximal degree in co-relation 4833. Up to 1402 conditions per place. [2024-05-12 13:13:47,429 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 32 selfloop transitions, 5 changer transitions 0/66 dead transitions. [2024-05-12 13:13:47,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 66 transitions, 298 flow [2024-05-12 13:13:47,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 13:13:47,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 13:13:47,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 113 transitions. [2024-05-12 13:13:47,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7533333333333333 [2024-05-12 13:13:47,431 INFO L175 Difference]: Start difference. First operand has 62 places, 58 transitions, 227 flow. Second operand 3 states and 113 transitions. [2024-05-12 13:13:47,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 66 transitions, 298 flow [2024-05-12 13:13:47,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 66 transitions, 274 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-05-12 13:13:47,433 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 184 flow [2024-05-12 13:13:47,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2024-05-12 13:13:47,434 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 4 predicate places. [2024-05-12 13:13:47,434 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 184 flow [2024-05-12 13:13:47,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:47,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:47,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:47,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 13:13:47,435 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:47,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:47,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1385462494, now seen corresponding path program 1 times [2024-05-12 13:13:47,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:47,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181398035] [2024-05-12 13:13:47,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:47,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:47,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:48,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:48,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:48,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181398035] [2024-05-12 13:13:48,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181398035] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:48,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:48,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 13:13:48,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032299046] [2024-05-12 13:13:48,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:48,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 13:13:48,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:48,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 13:13:48,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 13:13:48,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:13:48,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 184 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:48,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:48,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:13:48,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:48,754 INFO L124 PetriNetUnfolderBase]: 4479/6714 cut-off events. [2024-05-12 13:13:48,755 INFO L125 PetriNetUnfolderBase]: For 5841/5841 co-relation queries the response was YES. [2024-05-12 13:13:48,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16987 conditions, 6714 events. 4479/6714 cut-off events. For 5841/5841 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 39295 event pairs, 1715 based on Foata normal form. 6/6654 useless extension candidates. Maximal degree in co-relation 16969. Up to 6321 conditions per place. [2024-05-12 13:13:48,786 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 73 selfloop transitions, 13 changer transitions 5/102 dead transitions. [2024-05-12 13:13:48,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 102 transitions, 492 flow [2024-05-12 13:13:48,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:13:48,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:13:48,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-05-12 13:13:48,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5933333333333334 [2024-05-12 13:13:48,793 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 184 flow. Second operand 6 states and 178 transitions. [2024-05-12 13:13:48,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 102 transitions, 492 flow [2024-05-12 13:13:48,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 102 transitions, 480 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 13:13:48,802 INFO L231 Difference]: Finished difference. Result has 64 places, 56 transitions, 232 flow [2024-05-12 13:13:48,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=232, PETRI_PLACES=64, PETRI_TRANSITIONS=56} [2024-05-12 13:13:48,803 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 8 predicate places. [2024-05-12 13:13:48,804 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 56 transitions, 232 flow [2024-05-12 13:13:48,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:48,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:48,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:48,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 13:13:48,805 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:48,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:48,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1177936789, now seen corresponding path program 1 times [2024-05-12 13:13:48,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:48,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133015211] [2024-05-12 13:13:48,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:48,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:48,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:49,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:49,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:49,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133015211] [2024-05-12 13:13:49,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133015211] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:49,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:49,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 13:13:49,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856894564] [2024-05-12 13:13:49,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:49,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 13:13:49,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:49,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 13:13:49,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 13:13:49,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:13:49,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 56 transitions, 232 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:49,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:49,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:13:49,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:50,262 INFO L124 PetriNetUnfolderBase]: 3547/6217 cut-off events. [2024-05-12 13:13:50,262 INFO L125 PetriNetUnfolderBase]: For 6633/6637 co-relation queries the response was YES. [2024-05-12 13:13:50,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15416 conditions, 6217 events. 3547/6217 cut-off events. For 6633/6637 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 42578 event pairs, 1888 based on Foata normal form. 6/5971 useless extension candidates. Maximal degree in co-relation 15397. Up to 5111 conditions per place. [2024-05-12 13:13:50,296 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 58 selfloop transitions, 9 changer transitions 0/80 dead transitions. [2024-05-12 13:13:50,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 80 transitions, 444 flow [2024-05-12 13:13:50,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 13:13:50,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 13:13:50,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-05-12 13:13:50,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532 [2024-05-12 13:13:50,298 INFO L175 Difference]: Start difference. First operand has 64 places, 56 transitions, 232 flow. Second operand 5 states and 133 transitions. [2024-05-12 13:13:50,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 80 transitions, 444 flow [2024-05-12 13:13:50,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 80 transitions, 404 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-05-12 13:13:50,302 INFO L231 Difference]: Finished difference. Result has 65 places, 63 transitions, 275 flow [2024-05-12 13:13:50,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=275, PETRI_PLACES=65, PETRI_TRANSITIONS=63} [2024-05-12 13:13:50,304 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 9 predicate places. [2024-05-12 13:13:50,305 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 63 transitions, 275 flow [2024-05-12 13:13:50,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:50,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:50,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:50,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 13:13:50,305 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:50,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:50,306 INFO L85 PathProgramCache]: Analyzing trace with hash 2096661252, now seen corresponding path program 1 times [2024-05-12 13:13:50,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:50,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040517375] [2024-05-12 13:13:50,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:50,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:50,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:51,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:51,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:51,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040517375] [2024-05-12 13:13:51,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040517375] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:51,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:51,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:13:51,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367113763] [2024-05-12 13:13:51,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:51,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:13:51,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:51,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:13:51,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:13:51,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:13:51,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 63 transitions, 275 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:51,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:51,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:13:51,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:51,977 INFO L124 PetriNetUnfolderBase]: 4288/7261 cut-off events. [2024-05-12 13:13:51,977 INFO L125 PetriNetUnfolderBase]: For 10439/10443 co-relation queries the response was YES. [2024-05-12 13:13:51,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19271 conditions, 7261 events. 4288/7261 cut-off events. For 10439/10443 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 48882 event pairs, 2257 based on Foata normal form. 7/7059 useless extension candidates. Maximal degree in co-relation 19249. Up to 6086 conditions per place. [2024-05-12 13:13:52,019 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 71 selfloop transitions, 19 changer transitions 0/102 dead transitions. [2024-05-12 13:13:52,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 102 transitions, 599 flow [2024-05-12 13:13:52,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:13:52,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:13:52,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-05-12 13:13:52,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-05-12 13:13:52,021 INFO L175 Difference]: Start difference. First operand has 65 places, 63 transitions, 275 flow. Second operand 6 states and 160 transitions. [2024-05-12 13:13:52,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 102 transitions, 599 flow [2024-05-12 13:13:52,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 102 transitions, 580 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-05-12 13:13:52,026 INFO L231 Difference]: Finished difference. Result has 71 places, 75 transitions, 393 flow [2024-05-12 13:13:52,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=393, PETRI_PLACES=71, PETRI_TRANSITIONS=75} [2024-05-12 13:13:52,026 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-05-12 13:13:52,027 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 75 transitions, 393 flow [2024-05-12 13:13:52,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:52,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:52,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:52,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 13:13:52,027 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:52,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:52,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1614752330, now seen corresponding path program 1 times [2024-05-12 13:13:52,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:52,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862429574] [2024-05-12 13:13:52,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:52,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:52,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:52,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:52,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:52,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862429574] [2024-05-12 13:13:52,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862429574] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:52,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:52,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:13:52,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485794374] [2024-05-12 13:13:52,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:52,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:13:52,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:52,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:13:52,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:13:52,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:13:52,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 75 transitions, 393 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:52,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:52,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:13:52,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:53,781 INFO L124 PetriNetUnfolderBase]: 4575/7699 cut-off events. [2024-05-12 13:13:53,781 INFO L125 PetriNetUnfolderBase]: For 17277/17291 co-relation queries the response was YES. [2024-05-12 13:13:53,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22839 conditions, 7699 events. 4575/7699 cut-off events. For 17277/17291 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 51876 event pairs, 2341 based on Foata normal form. 6/7464 useless extension candidates. Maximal degree in co-relation 22813. Up to 6516 conditions per place. [2024-05-12 13:13:53,819 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 80 selfloop transitions, 13 changer transitions 0/108 dead transitions. [2024-05-12 13:13:53,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 108 transitions, 689 flow [2024-05-12 13:13:53,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:13:53,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:13:53,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-05-12 13:13:53,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-05-12 13:13:53,820 INFO L175 Difference]: Start difference. First operand has 71 places, 75 transitions, 393 flow. Second operand 6 states and 156 transitions. [2024-05-12 13:13:53,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 108 transitions, 689 flow [2024-05-12 13:13:53,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 108 transitions, 673 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-05-12 13:13:53,829 INFO L231 Difference]: Finished difference. Result has 77 places, 82 transitions, 474 flow [2024-05-12 13:13:53,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=474, PETRI_PLACES=77, PETRI_TRANSITIONS=82} [2024-05-12 13:13:53,831 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 21 predicate places. [2024-05-12 13:13:53,831 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 82 transitions, 474 flow [2024-05-12 13:13:53,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:53,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:53,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:53,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 13:13:53,832 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:53,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:53,832 INFO L85 PathProgramCache]: Analyzing trace with hash 445850401, now seen corresponding path program 1 times [2024-05-12 13:13:53,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:53,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040759101] [2024-05-12 13:13:53,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:53,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:53,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:54,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:54,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:54,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040759101] [2024-05-12 13:13:54,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040759101] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:54,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:54,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:13:54,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801531267] [2024-05-12 13:13:54,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:54,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:13:54,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:54,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:13:54,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:13:55,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:13:55,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 82 transitions, 474 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:55,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:55,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:13:55,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:55,892 INFO L124 PetriNetUnfolderBase]: 4167/6959 cut-off events. [2024-05-12 13:13:55,892 INFO L125 PetriNetUnfolderBase]: For 20345/20357 co-relation queries the response was YES. [2024-05-12 13:13:55,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22127 conditions, 6959 events. 4167/6959 cut-off events. For 20345/20357 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 46372 event pairs, 1569 based on Foata normal form. 6/6706 useless extension candidates. Maximal degree in co-relation 22097. Up to 5828 conditions per place. [2024-05-12 13:13:55,928 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 104 selfloop transitions, 24 changer transitions 0/142 dead transitions. [2024-05-12 13:13:55,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 142 transitions, 916 flow [2024-05-12 13:13:55,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:13:55,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:13:55,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-05-12 13:13:55,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.555 [2024-05-12 13:13:55,930 INFO L175 Difference]: Start difference. First operand has 77 places, 82 transitions, 474 flow. Second operand 8 states and 222 transitions. [2024-05-12 13:13:55,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 142 transitions, 916 flow [2024-05-12 13:13:55,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 142 transitions, 877 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-05-12 13:13:55,938 INFO L231 Difference]: Finished difference. Result has 82 places, 86 transitions, 528 flow [2024-05-12 13:13:55,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=528, PETRI_PLACES=82, PETRI_TRANSITIONS=86} [2024-05-12 13:13:55,939 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 26 predicate places. [2024-05-12 13:13:55,939 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 86 transitions, 528 flow [2024-05-12 13:13:55,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:55,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:55,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:55,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 13:13:55,940 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:55,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:55,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1874144458, now seen corresponding path program 2 times [2024-05-12 13:13:55,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:55,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438725678] [2024-05-12 13:13:55,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:55,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:55,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:56,723 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 13:13:56,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:56,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438725678] [2024-05-12 13:13:56,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438725678] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:56,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:56,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:13:56,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219698034] [2024-05-12 13:13:56,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:56,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:13:56,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:56,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:13:56,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:13:56,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:13:56,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 86 transitions, 528 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:56,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:56,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:13:56,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:57,548 INFO L124 PetriNetUnfolderBase]: 4553/7715 cut-off events. [2024-05-12 13:13:57,548 INFO L125 PetriNetUnfolderBase]: For 27371/27404 co-relation queries the response was YES. [2024-05-12 13:13:57,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25314 conditions, 7715 events. 4553/7715 cut-off events. For 27371/27404 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 52305 event pairs, 1935 based on Foata normal form. 20/7443 useless extension candidates. Maximal degree in co-relation 25283. Up to 6452 conditions per place. [2024-05-12 13:13:57,598 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 81 selfloop transitions, 18 changer transitions 0/114 dead transitions. [2024-05-12 13:13:57,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 114 transitions, 828 flow [2024-05-12 13:13:57,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:13:57,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:13:57,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-05-12 13:13:57,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-05-12 13:13:57,600 INFO L175 Difference]: Start difference. First operand has 82 places, 86 transitions, 528 flow. Second operand 6 states and 155 transitions. [2024-05-12 13:13:57,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 114 transitions, 828 flow [2024-05-12 13:13:57,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 114 transitions, 763 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-05-12 13:13:57,613 INFO L231 Difference]: Finished difference. Result has 83 places, 89 transitions, 545 flow [2024-05-12 13:13:57,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=545, PETRI_PLACES=83, PETRI_TRANSITIONS=89} [2024-05-12 13:13:57,614 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 27 predicate places. [2024-05-12 13:13:57,614 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 89 transitions, 545 flow [2024-05-12 13:13:57,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:57,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:57,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:57,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-05-12 13:13:57,615 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:57,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:57,615 INFO L85 PathProgramCache]: Analyzing trace with hash 571990760, now seen corresponding path program 1 times [2024-05-12 13:13:57,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:57,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796556648] [2024-05-12 13:13:57,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:57,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:58,642 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 13:13:58,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:58,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796556648] [2024-05-12 13:13:58,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796556648] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:58,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:58,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:13:58,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537217646] [2024-05-12 13:13:58,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:58,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:13:58,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:58,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:13:58,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:13:58,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:13:58,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 89 transitions, 545 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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 13:13:58,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:58,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:13:58,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:59,545 INFO L124 PetriNetUnfolderBase]: 4312/7390 cut-off events. [2024-05-12 13:13:59,545 INFO L125 PetriNetUnfolderBase]: For 31266/31272 co-relation queries the response was YES. [2024-05-12 13:13:59,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25240 conditions, 7390 events. 4312/7390 cut-off events. For 31266/31272 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 50194 event pairs, 1782 based on Foata normal form. 9/7174 useless extension candidates. Maximal degree in co-relation 25207. Up to 6073 conditions per place. [2024-05-12 13:13:59,590 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 95 selfloop transitions, 34 changer transitions 0/141 dead transitions. [2024-05-12 13:13:59,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 141 transitions, 1081 flow [2024-05-12 13:13:59,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:13:59,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:13:59,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-05-12 13:13:59,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5314285714285715 [2024-05-12 13:13:59,594 INFO L175 Difference]: Start difference. First operand has 83 places, 89 transitions, 545 flow. Second operand 7 states and 186 transitions. [2024-05-12 13:13:59,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 141 transitions, 1081 flow [2024-05-12 13:13:59,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 141 transitions, 1023 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-05-12 13:13:59,608 INFO L231 Difference]: Finished difference. Result has 89 places, 104 transitions, 741 flow [2024-05-12 13:13:59,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=741, PETRI_PLACES=89, PETRI_TRANSITIONS=104} [2024-05-12 13:13:59,609 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 33 predicate places. [2024-05-12 13:13:59,609 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 104 transitions, 741 flow [2024-05-12 13:13:59,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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 13:13:59,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:59,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:59,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-05-12 13:13:59,610 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:59,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:59,611 INFO L85 PathProgramCache]: Analyzing trace with hash 314228842, now seen corresponding path program 1 times [2024-05-12 13:13:59,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:59,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833156107] [2024-05-12 13:13:59,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:59,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:59,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:14:00,496 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 13:14:00,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:14:00,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833156107] [2024-05-12 13:14:00,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833156107] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:14:00,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:14:00,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:14:00,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630594750] [2024-05-12 13:14:00,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:14:00,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:14:00,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:14:00,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:14:00,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:14:00,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:14:00,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 104 transitions, 741 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:00,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:14:00,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:14:00,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:01,609 INFO L124 PetriNetUnfolderBase]: 4856/7776 cut-off events. [2024-05-12 13:14:01,610 INFO L125 PetriNetUnfolderBase]: For 43928/44012 co-relation queries the response was YES. [2024-05-12 13:14:01,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29708 conditions, 7776 events. 4856/7776 cut-off events. For 43928/44012 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 49709 event pairs, 1908 based on Foata normal form. 12/7563 useless extension candidates. Maximal degree in co-relation 29671. Up to 6843 conditions per place. [2024-05-12 13:14:01,657 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 112 selfloop transitions, 17 changer transitions 0/146 dead transitions. [2024-05-12 13:14:01,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 146 transitions, 1152 flow [2024-05-12 13:14:01,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:14:01,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:14:01,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-05-12 13:14:01,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5028571428571429 [2024-05-12 13:14:01,659 INFO L175 Difference]: Start difference. First operand has 89 places, 104 transitions, 741 flow. Second operand 7 states and 176 transitions. [2024-05-12 13:14:01,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 146 transitions, 1152 flow [2024-05-12 13:14:01,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 146 transitions, 1094 flow, removed 28 selfloop flow, removed 1 redundant places. [2024-05-12 13:14:01,687 INFO L231 Difference]: Finished difference. Result has 96 places, 111 transitions, 807 flow [2024-05-12 13:14:01,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=807, PETRI_PLACES=96, PETRI_TRANSITIONS=111} [2024-05-12 13:14:01,687 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 40 predicate places. [2024-05-12 13:14:01,687 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 111 transitions, 807 flow [2024-05-12 13:14:01,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:01,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:01,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:01,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-05-12 13:14:01,688 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:01,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:01,688 INFO L85 PathProgramCache]: Analyzing trace with hash 314409541, now seen corresponding path program 1 times [2024-05-12 13:14:01,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:01,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385691712] [2024-05-12 13:14:01,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:01,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:01,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:14:02,554 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 13:14:02,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:14:02,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385691712] [2024-05-12 13:14:02,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385691712] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:14:02,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:14:02,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:14:02,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31517416] [2024-05-12 13:14:02,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:14:02,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:14:02,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:14:02,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:14:02,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:14:02,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:14:02,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 111 transitions, 807 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:02,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:14:02,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:14:02,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:03,621 INFO L124 PetriNetUnfolderBase]: 5130/8226 cut-off events. [2024-05-12 13:14:03,621 INFO L125 PetriNetUnfolderBase]: For 53066/53066 co-relation queries the response was YES. [2024-05-12 13:14:03,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31892 conditions, 8226 events. 5130/8226 cut-off events. For 53066/53066 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 53007 event pairs, 2095 based on Foata normal form. 3/8033 useless extension candidates. Maximal degree in co-relation 31851. Up to 7235 conditions per place. [2024-05-12 13:14:03,677 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 121 selfloop transitions, 26 changer transitions 0/160 dead transitions. [2024-05-12 13:14:03,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 160 transitions, 1377 flow [2024-05-12 13:14:03,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:14:03,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:14:03,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-05-12 13:14:03,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-05-12 13:14:03,678 INFO L175 Difference]: Start difference. First operand has 96 places, 111 transitions, 807 flow. Second operand 7 states and 182 transitions. [2024-05-12 13:14:03,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 160 transitions, 1377 flow [2024-05-12 13:14:03,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 160 transitions, 1314 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-05-12 13:14:03,702 INFO L231 Difference]: Finished difference. Result has 101 places, 123 transitions, 946 flow [2024-05-12 13:14:03,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=744, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=946, PETRI_PLACES=101, PETRI_TRANSITIONS=123} [2024-05-12 13:14:03,702 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 45 predicate places. [2024-05-12 13:14:03,703 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 123 transitions, 946 flow [2024-05-12 13:14:03,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:03,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:03,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:03,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-05-12 13:14:03,703 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:03,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:03,704 INFO L85 PathProgramCache]: Analyzing trace with hash 314409262, now seen corresponding path program 2 times [2024-05-12 13:14:03,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:03,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766682161] [2024-05-12 13:14:03,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:03,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:03,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:14:04,514 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 13:14:04,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:14:04,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766682161] [2024-05-12 13:14:04,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766682161] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:14:04,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:14:04,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:14:04,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622806282] [2024-05-12 13:14:04,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:14:04,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:14:04,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:14:04,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:14:04,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:14:04,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:14:04,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 123 transitions, 946 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:04,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:14:04,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:14:04,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:05,642 INFO L124 PetriNetUnfolderBase]: 5008/7975 cut-off events. [2024-05-12 13:14:05,642 INFO L125 PetriNetUnfolderBase]: For 61855/61965 co-relation queries the response was YES. [2024-05-12 13:14:05,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33230 conditions, 7975 events. 5008/7975 cut-off events. For 61855/61965 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 50644 event pairs, 1860 based on Foata normal form. 12/7748 useless extension candidates. Maximal degree in co-relation 33186. Up to 6988 conditions per place. [2024-05-12 13:14:05,698 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 118 selfloop transitions, 22 changer transitions 0/160 dead transitions. [2024-05-12 13:14:05,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 160 transitions, 1374 flow [2024-05-12 13:14:05,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:14:05,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:14:05,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-05-12 13:14:05,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5028571428571429 [2024-05-12 13:14:05,700 INFO L175 Difference]: Start difference. First operand has 101 places, 123 transitions, 946 flow. Second operand 7 states and 176 transitions. [2024-05-12 13:14:05,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 160 transitions, 1374 flow [2024-05-12 13:14:05,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 160 transitions, 1312 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-05-12 13:14:05,812 INFO L231 Difference]: Finished difference. Result has 106 places, 126 transitions, 990 flow [2024-05-12 13:14:05,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=884, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=990, PETRI_PLACES=106, PETRI_TRANSITIONS=126} [2024-05-12 13:14:05,813 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 50 predicate places. [2024-05-12 13:14:05,813 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 126 transitions, 990 flow [2024-05-12 13:14:05,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:05,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:05,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:05,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-05-12 13:14:05,814 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:05,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:05,814 INFO L85 PathProgramCache]: Analyzing trace with hash -2031062589, now seen corresponding path program 2 times [2024-05-12 13:14:05,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:05,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27930877] [2024-05-12 13:14:05,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:05,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:14:06,635 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 13:14:06,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:14:06,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27930877] [2024-05-12 13:14:06,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27930877] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:14:06,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:14:06,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:14:06,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981272879] [2024-05-12 13:14:06,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:14:06,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:14:06,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:14:06,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:14:06,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:14:06,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:14:06,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 126 transitions, 990 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:06,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:14:06,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:14:06,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:07,818 INFO L124 PetriNetUnfolderBase]: 5211/8661 cut-off events. [2024-05-12 13:14:07,818 INFO L125 PetriNetUnfolderBase]: For 75667/75689 co-relation queries the response was YES. [2024-05-12 13:14:07,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36280 conditions, 8661 events. 5211/8661 cut-off events. For 75667/75689 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 57779 event pairs, 2039 based on Foata normal form. 21/8392 useless extension candidates. Maximal degree in co-relation 36234. Up to 7147 conditions per place. [2024-05-12 13:14:07,877 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 120 selfloop transitions, 38 changer transitions 0/172 dead transitions. [2024-05-12 13:14:07,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 172 transitions, 1644 flow [2024-05-12 13:14:07,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:14:07,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:14:07,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-05-12 13:14:07,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257142857142857 [2024-05-12 13:14:07,879 INFO L175 Difference]: Start difference. First operand has 106 places, 126 transitions, 990 flow. Second operand 7 states and 184 transitions. [2024-05-12 13:14:07,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 172 transitions, 1644 flow [2024-05-12 13:14:07,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 172 transitions, 1562 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-05-12 13:14:07,923 INFO L231 Difference]: Finished difference. Result has 109 places, 134 transitions, 1104 flow [2024-05-12 13:14:07,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=908, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1104, PETRI_PLACES=109, PETRI_TRANSITIONS=134} [2024-05-12 13:14:07,924 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 53 predicate places. [2024-05-12 13:14:07,924 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 134 transitions, 1104 flow [2024-05-12 13:14:07,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:07,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:07,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:07,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-05-12 13:14:07,925 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:07,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:07,925 INFO L85 PathProgramCache]: Analyzing trace with hash 551507182, now seen corresponding path program 3 times [2024-05-12 13:14:07,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:07,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108635031] [2024-05-12 13:14:07,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:07,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:07,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:14:08,732 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 13:14:08,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:14:08,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108635031] [2024-05-12 13:14:08,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108635031] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:14:08,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:14:08,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:14:08,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176968996] [2024-05-12 13:14:08,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:14:08,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:14:08,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:14:08,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:14:08,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:14:08,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:14:08,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 134 transitions, 1104 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:08,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:14:08,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:14:08,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:09,951 INFO L124 PetriNetUnfolderBase]: 5038/8271 cut-off events. [2024-05-12 13:14:09,952 INFO L125 PetriNetUnfolderBase]: For 81305/81468 co-relation queries the response was YES. [2024-05-12 13:14:09,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36668 conditions, 8271 events. 5038/8271 cut-off events. For 81305/81468 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 54008 event pairs, 1791 based on Foata normal form. 20/7981 useless extension candidates. Maximal degree in co-relation 36620. Up to 6974 conditions per place. [2024-05-12 13:14:10,009 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 119 selfloop transitions, 29 changer transitions 0/170 dead transitions. [2024-05-12 13:14:10,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 170 transitions, 1564 flow [2024-05-12 13:14:10,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:14:10,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:14:10,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-05-12 13:14:10,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5028571428571429 [2024-05-12 13:14:10,011 INFO L175 Difference]: Start difference. First operand has 109 places, 134 transitions, 1104 flow. Second operand 7 states and 176 transitions. [2024-05-12 13:14:10,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 170 transitions, 1564 flow [2024-05-12 13:14:10,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 170 transitions, 1449 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-05-12 13:14:10,073 INFO L231 Difference]: Finished difference. Result has 112 places, 137 transitions, 1119 flow [2024-05-12 13:14:10,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1119, PETRI_PLACES=112, PETRI_TRANSITIONS=137} [2024-05-12 13:14:10,074 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 56 predicate places. [2024-05-12 13:14:10,074 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 137 transitions, 1119 flow [2024-05-12 13:14:10,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:10,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:10,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:10,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-05-12 13:14:10,074 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:10,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:10,075 INFO L85 PathProgramCache]: Analyzing trace with hash 320934421, now seen corresponding path program 3 times [2024-05-12 13:14:10,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:10,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082491857] [2024-05-12 13:14:10,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:10,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:10,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:14:10,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:14:10,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:14:10,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082491857] [2024-05-12 13:14:10,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082491857] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:14:10,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:14:10,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:14:10,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673198392] [2024-05-12 13:14:10,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:14:10,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:14:10,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:14:10,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:14:10,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:14:10,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:14:10,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 137 transitions, 1119 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:10,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:14:10,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:14:10,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:11,946 INFO L124 PetriNetUnfolderBase]: 5224/8687 cut-off events. [2024-05-12 13:14:11,946 INFO L125 PetriNetUnfolderBase]: For 93314/93336 co-relation queries the response was YES. [2024-05-12 13:14:11,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38071 conditions, 8687 events. 5224/8687 cut-off events. For 93314/93336 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 58126 event pairs, 2034 based on Foata normal form. 21/8415 useless extension candidates. Maximal degree in co-relation 38022. Up to 7164 conditions per place. [2024-05-12 13:14:12,023 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 115 selfloop transitions, 46 changer transitions 0/176 dead transitions. [2024-05-12 13:14:12,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 176 transitions, 1666 flow [2024-05-12 13:14:12,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:14:12,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:14:12,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-05-12 13:14:12,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-05-12 13:14:12,024 INFO L175 Difference]: Start difference. First operand has 112 places, 137 transitions, 1119 flow. Second operand 7 states and 182 transitions. [2024-05-12 13:14:12,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 176 transitions, 1666 flow [2024-05-12 13:14:12,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 176 transitions, 1560 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-05-12 13:14:12,092 INFO L231 Difference]: Finished difference. Result has 114 places, 141 transitions, 1171 flow [2024-05-12 13:14:12,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1013, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1171, PETRI_PLACES=114, PETRI_TRANSITIONS=141} [2024-05-12 13:14:12,092 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 58 predicate places. [2024-05-12 13:14:12,093 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 141 transitions, 1171 flow [2024-05-12 13:14:12,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:12,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:12,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:12,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-05-12 13:14:12,093 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:12,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:12,093 INFO L85 PathProgramCache]: Analyzing trace with hash 551845795, now seen corresponding path program 1 times [2024-05-12 13:14:12,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:12,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270102047] [2024-05-12 13:14:12,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:12,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:12,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:14:13,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:14:13,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:14:13,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270102047] [2024-05-12 13:14:13,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270102047] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:14:13,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:14:13,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:14:13,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110919055] [2024-05-12 13:14:13,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:14:13,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:14:13,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:14:13,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:14:13,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:14:13,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:14:13,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 141 transitions, 1171 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:13,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:14:13,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:14:13,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:14,298 INFO L124 PetriNetUnfolderBase]: 4556/7831 cut-off events. [2024-05-12 13:14:14,299 INFO L125 PetriNetUnfolderBase]: For 89442/89442 co-relation queries the response was YES. [2024-05-12 13:14:14,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34707 conditions, 7831 events. 4556/7831 cut-off events. For 89442/89442 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 53782 event pairs, 1701 based on Foata normal form. 6/7583 useless extension candidates. Maximal degree in co-relation 34657. Up to 6359 conditions per place. [2024-05-12 13:14:14,363 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 150 selfloop transitions, 26 changer transitions 0/192 dead transitions. [2024-05-12 13:14:14,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 192 transitions, 1797 flow [2024-05-12 13:14:14,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:14:14,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:14:14,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-05-12 13:14:14,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5275 [2024-05-12 13:14:14,365 INFO L175 Difference]: Start difference. First operand has 114 places, 141 transitions, 1171 flow. Second operand 8 states and 211 transitions. [2024-05-12 13:14:14,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 192 transitions, 1797 flow [2024-05-12 13:14:14,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 192 transitions, 1696 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-05-12 13:14:14,415 INFO L231 Difference]: Finished difference. Result has 119 places, 148 transitions, 1219 flow [2024-05-12 13:14:14,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1070, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1219, PETRI_PLACES=119, PETRI_TRANSITIONS=148} [2024-05-12 13:14:14,415 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 63 predicate places. [2024-05-12 13:14:14,415 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 148 transitions, 1219 flow [2024-05-12 13:14:14,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:14,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:14,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:14,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-05-12 13:14:14,416 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:14,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:14,417 INFO L85 PathProgramCache]: Analyzing trace with hash -264425606, now seen corresponding path program 1 times [2024-05-12 13:14:14,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:14,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684051924] [2024-05-12 13:14:14,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:14,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:14,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:14:15,020 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 13:14:15,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:14:15,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684051924] [2024-05-12 13:14:15,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684051924] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:14:15,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:14:15,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 13:14:15,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562792871] [2024-05-12 13:14:15,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:14:15,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 13:14:15,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:14:15,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 13:14:15,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-05-12 13:14:15,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:14:15,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 148 transitions, 1219 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:15,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:14:15,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:14:15,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:16,001 INFO L124 PetriNetUnfolderBase]: 4553/7565 cut-off events. [2024-05-12 13:14:16,001 INFO L125 PetriNetUnfolderBase]: For 96302/96302 co-relation queries the response was YES. [2024-05-12 13:14:16,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35206 conditions, 7565 events. 4553/7565 cut-off events. For 96302/96302 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 50434 event pairs, 1786 based on Foata normal form. 1/7388 useless extension candidates. Maximal degree in co-relation 35154. Up to 6510 conditions per place. [2024-05-12 13:14:16,056 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 132 selfloop transitions, 14 changer transitions 0/162 dead transitions. [2024-05-12 13:14:16,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 162 transitions, 1543 flow [2024-05-12 13:14:16,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 13:14:16,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 13:14:16,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-05-12 13:14:16,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-05-12 13:14:16,057 INFO L175 Difference]: Start difference. First operand has 119 places, 148 transitions, 1219 flow. Second operand 5 states and 125 transitions. [2024-05-12 13:14:16,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 162 transitions, 1543 flow [2024-05-12 13:14:16,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 162 transitions, 1438 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-05-12 13:14:16,105 INFO L231 Difference]: Finished difference. Result has 119 places, 148 transitions, 1152 flow [2024-05-12 13:14:16,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1152, PETRI_PLACES=119, PETRI_TRANSITIONS=148} [2024-05-12 13:14:16,106 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 63 predicate places. [2024-05-12 13:14:16,106 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 148 transitions, 1152 flow [2024-05-12 13:14:16,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:16,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:16,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:16,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-05-12 13:14:16,107 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:16,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:16,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1288086121, now seen corresponding path program 1 times [2024-05-12 13:14:16,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:16,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460340578] [2024-05-12 13:14:16,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:16,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:16,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:14:16,852 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 13:14:16,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:14:16,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460340578] [2024-05-12 13:14:16,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460340578] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:14:16,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:14:16,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:14:16,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556716464] [2024-05-12 13:14:16,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:14:16,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:14:16,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:14:16,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:14:16,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:14:16,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:14:16,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 148 transitions, 1152 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:16,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:14:16,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:14:16,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:18,040 INFO L124 PetriNetUnfolderBase]: 5163/8247 cut-off events. [2024-05-12 13:14:18,040 INFO L125 PetriNetUnfolderBase]: For 112243/112334 co-relation queries the response was YES. [2024-05-12 13:14:18,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38988 conditions, 8247 events. 5163/8247 cut-off events. For 112243/112334 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 52874 event pairs, 1876 based on Foata normal form. 19/8029 useless extension candidates. Maximal degree in co-relation 38935. Up to 7175 conditions per place. [2024-05-12 13:14:18,103 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 154 selfloop transitions, 21 changer transitions 0/200 dead transitions. [2024-05-12 13:14:18,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 200 transitions, 1711 flow [2024-05-12 13:14:18,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:14:18,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:14:18,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-05-12 13:14:18,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075 [2024-05-12 13:14:18,105 INFO L175 Difference]: Start difference. First operand has 119 places, 148 transitions, 1152 flow. Second operand 8 states and 203 transitions. [2024-05-12 13:14:18,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 200 transitions, 1711 flow [2024-05-12 13:14:18,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 200 transitions, 1672 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-05-12 13:14:18,171 INFO L231 Difference]: Finished difference. Result has 124 places, 155 transitions, 1271 flow [2024-05-12 13:14:18,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1113, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1271, PETRI_PLACES=124, PETRI_TRANSITIONS=155} [2024-05-12 13:14:18,172 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 68 predicate places. [2024-05-12 13:14:18,172 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 155 transitions, 1271 flow [2024-05-12 13:14:18,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:18,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:18,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:18,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-05-12 13:14:18,173 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:18,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:18,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1151160619, now seen corresponding path program 2 times [2024-05-12 13:14:18,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:18,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362488023] [2024-05-12 13:14:18,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:18,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:18,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:14:18,957 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 13:14:18,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:14:18,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362488023] [2024-05-12 13:14:18,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362488023] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:14:18,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:14:18,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:14:18,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518675591] [2024-05-12 13:14:18,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:14:18,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:14:18,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:14:18,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:14:18,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:14:19,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:14:19,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 155 transitions, 1271 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:19,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:14:19,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:14:19,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:20,153 INFO L124 PetriNetUnfolderBase]: 5209/8320 cut-off events. [2024-05-12 13:14:20,153 INFO L125 PetriNetUnfolderBase]: For 128269/128362 co-relation queries the response was YES. [2024-05-12 13:14:20,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41076 conditions, 8320 events. 5209/8320 cut-off events. For 128269/128362 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 53348 event pairs, 1872 based on Foata normal form. 19/8102 useless extension candidates. Maximal degree in co-relation 41022. Up to 7190 conditions per place. [2024-05-12 13:14:20,224 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 152 selfloop transitions, 26 changer transitions 0/203 dead transitions. [2024-05-12 13:14:20,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 203 transitions, 1829 flow [2024-05-12 13:14:20,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:14:20,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:14:20,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-05-12 13:14:20,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-05-12 13:14:20,226 INFO L175 Difference]: Start difference. First operand has 124 places, 155 transitions, 1271 flow. Second operand 8 states and 204 transitions. [2024-05-12 13:14:20,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 203 transitions, 1829 flow [2024-05-12 13:14:20,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 203 transitions, 1730 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-05-12 13:14:20,305 INFO L231 Difference]: Finished difference. Result has 127 places, 158 transitions, 1306 flow [2024-05-12 13:14:20,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1172, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1306, PETRI_PLACES=127, PETRI_TRANSITIONS=158} [2024-05-12 13:14:20,306 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 71 predicate places. [2024-05-12 13:14:20,306 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 158 transitions, 1306 flow [2024-05-12 13:14:20,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:20,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:20,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:20,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-05-12 13:14:20,307 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:20,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:20,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1288237029, now seen corresponding path program 1 times [2024-05-12 13:14:20,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:20,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171042527] [2024-05-12 13:14:20,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:20,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:20,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:14:21,092 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 13:14:21,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:14:21,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171042527] [2024-05-12 13:14:21,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171042527] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:14:21,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:14:21,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:14:21,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070911860] [2024-05-12 13:14:21,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:14:21,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:14:21,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:14:21,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:14:21,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:14:21,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:14:21,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 158 transitions, 1306 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 13:14:21,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:14:21,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:14:21,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:22,495 INFO L124 PetriNetUnfolderBase]: 5701/8986 cut-off events. [2024-05-12 13:14:22,495 INFO L125 PetriNetUnfolderBase]: For 145612/145612 co-relation queries the response was YES. [2024-05-12 13:14:22,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45147 conditions, 8986 events. 5701/8986 cut-off events. For 145612/145612 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 56862 event pairs, 2030 based on Foata normal form. 3/8779 useless extension candidates. Maximal degree in co-relation 45092. Up to 7967 conditions per place. [2024-05-12 13:14:22,552 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 174 selfloop transitions, 33 changer transitions 0/216 dead transitions. [2024-05-12 13:14:22,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 216 transitions, 2136 flow [2024-05-12 13:14:22,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:14:22,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:14:22,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-05-12 13:14:22,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.505 [2024-05-12 13:14:22,553 INFO L175 Difference]: Start difference. First operand has 127 places, 158 transitions, 1306 flow. Second operand 8 states and 202 transitions. [2024-05-12 13:14:22,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 216 transitions, 2136 flow [2024-05-12 13:14:22,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 216 transitions, 2026 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-05-12 13:14:22,633 INFO L231 Difference]: Finished difference. Result has 131 places, 170 transitions, 1468 flow [2024-05-12 13:14:22,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1196, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1468, PETRI_PLACES=131, PETRI_TRANSITIONS=170} [2024-05-12 13:14:22,633 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 75 predicate places. [2024-05-12 13:14:22,633 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 170 transitions, 1468 flow [2024-05-12 13:14:22,634 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 13:14:22,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:22,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:22,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-05-12 13:14:22,634 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:22,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:22,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1156753887, now seen corresponding path program 2 times [2024-05-12 13:14:22,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:22,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145638456] [2024-05-12 13:14:22,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:22,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:22,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:14:23,436 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 13:14:23,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:14:23,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145638456] [2024-05-12 13:14:23,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145638456] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:14:23,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:14:23,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:14:23,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852618423] [2024-05-12 13:14:23,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:14:23,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:14:23,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:14:23,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:14:23,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:14:23,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:14:23,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 170 transitions, 1468 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 13:14:23,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:14:23,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:14:23,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:24,783 INFO L124 PetriNetUnfolderBase]: 5811/9138 cut-off events. [2024-05-12 13:14:24,784 INFO L125 PetriNetUnfolderBase]: For 166851/166851 co-relation queries the response was YES. [2024-05-12 13:14:24,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48380 conditions, 9138 events. 5811/9138 cut-off events. For 166851/166851 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 57629 event pairs, 2025 based on Foata normal form. 3/8931 useless extension candidates. Maximal degree in co-relation 48322. Up to 7928 conditions per place. [2024-05-12 13:14:24,857 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 171 selfloop transitions, 45 changer transitions 0/225 dead transitions. [2024-05-12 13:14:24,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 225 transitions, 2388 flow [2024-05-12 13:14:24,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:14:24,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:14:24,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-05-12 13:14:24,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-05-12 13:14:24,858 INFO L175 Difference]: Start difference. First operand has 131 places, 170 transitions, 1468 flow. Second operand 8 states and 204 transitions. [2024-05-12 13:14:24,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 225 transitions, 2388 flow [2024-05-12 13:14:24,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 225 transitions, 2277 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-05-12 13:14:24,960 INFO L231 Difference]: Finished difference. Result has 137 places, 178 transitions, 1607 flow [2024-05-12 13:14:24,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1357, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1607, PETRI_PLACES=137, PETRI_TRANSITIONS=178} [2024-05-12 13:14:24,960 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 81 predicate places. [2024-05-12 13:14:24,961 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 178 transitions, 1607 flow [2024-05-12 13:14:24,961 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 13:14:24,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:24,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:24,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-05-12 13:14:24,961 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:24,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:24,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1156753639, now seen corresponding path program 3 times [2024-05-12 13:14:24,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:24,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299784106] [2024-05-12 13:14:24,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:24,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:24,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:14:25,750 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 13:14:25,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:14:25,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299784106] [2024-05-12 13:14:25,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299784106] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:14:25,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:14:25,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:14:25,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384468778] [2024-05-12 13:14:25,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:14:25,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:14:25,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:14:25,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:14:25,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:14:25,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:14:25,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 178 transitions, 1607 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:25,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:14:25,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:14:25,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:27,052 INFO L124 PetriNetUnfolderBase]: 5491/8722 cut-off events. [2024-05-12 13:14:27,052 INFO L125 PetriNetUnfolderBase]: For 183297/183464 co-relation queries the response was YES. [2024-05-12 13:14:27,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48488 conditions, 8722 events. 5491/8722 cut-off events. For 183297/183464 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 55790 event pairs, 1832 based on Foata normal form. 19/8488 useless extension candidates. Maximal degree in co-relation 48427. Up to 7460 conditions per place. [2024-05-12 13:14:27,126 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 162 selfloop transitions, 33 changer transitions 0/225 dead transitions. [2024-05-12 13:14:27,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 225 transitions, 2227 flow [2024-05-12 13:14:27,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:14:27,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:14:27,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-05-12 13:14:27,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-05-12 13:14:27,128 INFO L175 Difference]: Start difference. First operand has 137 places, 178 transitions, 1607 flow. Second operand 8 states and 204 transitions. [2024-05-12 13:14:27,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 225 transitions, 2227 flow [2024-05-12 13:14:27,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 225 transitions, 2068 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-05-12 13:14:27,252 INFO L231 Difference]: Finished difference. Result has 140 places, 181 transitions, 1610 flow [2024-05-12 13:14:27,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1448, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1610, PETRI_PLACES=140, PETRI_TRANSITIONS=181} [2024-05-12 13:14:27,253 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 84 predicate places. [2024-05-12 13:14:27,253 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 181 transitions, 1610 flow [2024-05-12 13:14:27,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:27,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:27,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:27,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-05-12 13:14:27,253 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:27,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:27,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1156762257, now seen corresponding path program 3 times [2024-05-12 13:14:27,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:27,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538758488] [2024-05-12 13:14:27,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:27,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:27,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:14:28,039 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 13:14:28,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:14:28,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538758488] [2024-05-12 13:14:28,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538758488] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:14:28,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:14:28,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:14:28,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343041660] [2024-05-12 13:14:28,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:14:28,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:14:28,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:14:28,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:14:28,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:14:28,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:14:28,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 181 transitions, 1610 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 13:14:28,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:14:28,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:14:28,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:29,427 INFO L124 PetriNetUnfolderBase]: 5871/9241 cut-off events. [2024-05-12 13:14:29,427 INFO L125 PetriNetUnfolderBase]: For 198336/198336 co-relation queries the response was YES. [2024-05-12 13:14:29,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50968 conditions, 9241 events. 5871/9241 cut-off events. For 198336/198336 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 58490 event pairs, 2022 based on Foata normal form. 3/9030 useless extension candidates. Maximal degree in co-relation 50906. Up to 8009 conditions per place. [2024-05-12 13:14:29,511 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 167 selfloop transitions, 53 changer transitions 0/229 dead transitions. [2024-05-12 13:14:29,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 229 transitions, 2359 flow [2024-05-12 13:14:29,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:14:29,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:14:29,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-05-12 13:14:29,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.505 [2024-05-12 13:14:29,512 INFO L175 Difference]: Start difference. First operand has 140 places, 181 transitions, 1610 flow. Second operand 8 states and 202 transitions. [2024-05-12 13:14:29,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 229 transitions, 2359 flow [2024-05-12 13:14:29,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 229 transitions, 2221 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-05-12 13:14:29,630 INFO L231 Difference]: Finished difference. Result has 142 places, 185 transitions, 1662 flow [2024-05-12 13:14:29,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1472, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1662, PETRI_PLACES=142, PETRI_TRANSITIONS=185} [2024-05-12 13:14:29,631 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 86 predicate places. [2024-05-12 13:14:29,631 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 185 transitions, 1662 flow [2024-05-12 13:14:29,631 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 13:14:29,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:29,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:29,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-05-12 13:14:29,632 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:29,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:29,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1156762567, now seen corresponding path program 1 times [2024-05-12 13:14:29,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:29,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977823009] [2024-05-12 13:14:29,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:29,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:29,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:14:30,525 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 13:14:30,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:14:30,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977823009] [2024-05-12 13:14:30,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977823009] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:14:30,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:14:30,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:14:30,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380530410] [2024-05-12 13:14:30,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:14:30,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:14:30,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:14:30,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:14:30,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:14:30,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:14:30,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 185 transitions, 1662 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:30,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:14:30,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:14:30,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:32,048 INFO L124 PetriNetUnfolderBase]: 5690/9049 cut-off events. [2024-05-12 13:14:32,049 INFO L125 PetriNetUnfolderBase]: For 206432/206444 co-relation queries the response was YES. [2024-05-12 13:14:32,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50054 conditions, 9049 events. 5690/9049 cut-off events. For 206432/206444 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 58156 event pairs, 1980 based on Foata normal form. 15/8859 useless extension candidates. Maximal degree in co-relation 49991. Up to 7821 conditions per place. [2024-05-12 13:14:32,113 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 182 selfloop transitions, 44 changer transitions 0/247 dead transitions. [2024-05-12 13:14:32,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 247 transitions, 2658 flow [2024-05-12 13:14:32,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:14:32,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:14:32,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-05-12 13:14:32,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-05-12 13:14:32,115 INFO L175 Difference]: Start difference. First operand has 142 places, 185 transitions, 1662 flow. Second operand 8 states and 208 transitions. [2024-05-12 13:14:32,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 247 transitions, 2658 flow [2024-05-12 13:14:32,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 247 transitions, 2525 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-05-12 13:14:32,226 INFO L231 Difference]: Finished difference. Result has 148 places, 200 transitions, 1934 flow [2024-05-12 13:14:32,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1529, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1934, PETRI_PLACES=148, PETRI_TRANSITIONS=200} [2024-05-12 13:14:32,226 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 92 predicate places. [2024-05-12 13:14:32,226 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 200 transitions, 1934 flow [2024-05-12 13:14:32,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:32,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:32,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:32,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-05-12 13:14:32,227 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:32,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:32,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1471689589, now seen corresponding path program 4 times [2024-05-12 13:14:32,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:32,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616838748] [2024-05-12 13:14:32,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:32,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:32,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:14:33,020 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 13:14:33,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:14:33,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616838748] [2024-05-12 13:14:33,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616838748] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:14:33,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:14:33,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:14:33,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954213679] [2024-05-12 13:14:33,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:14:33,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:14:33,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:14:33,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:14:33,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:14:33,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:14:33,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 200 transitions, 1934 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 13:14:33,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:14:33,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:14:33,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:34,499 INFO L124 PetriNetUnfolderBase]: 6015/9694 cut-off events. [2024-05-12 13:14:34,499 INFO L125 PetriNetUnfolderBase]: For 236849/236871 co-relation queries the response was YES. [2024-05-12 13:14:34,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55427 conditions, 9694 events. 6015/9694 cut-off events. For 236849/236871 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 62826 event pairs, 1902 based on Foata normal form. 21/9417 useless extension candidates. Maximal degree in co-relation 55360. Up to 7878 conditions per place. [2024-05-12 13:14:34,579 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 165 selfloop transitions, 83 changer transitions 0/257 dead transitions. [2024-05-12 13:14:34,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 257 transitions, 3028 flow [2024-05-12 13:14:34,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:14:34,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:14:34,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-05-12 13:14:34,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-05-12 13:14:34,580 INFO L175 Difference]: Start difference. First operand has 148 places, 200 transitions, 1934 flow. Second operand 8 states and 205 transitions. [2024-05-12 13:14:34,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 257 transitions, 3028 flow [2024-05-12 13:14:34,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 257 transitions, 2867 flow, removed 74 selfloop flow, removed 2 redundant places. [2024-05-12 13:14:34,765 INFO L231 Difference]: Finished difference. Result has 155 places, 212 transitions, 2245 flow [2024-05-12 13:14:34,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1775, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2245, PETRI_PLACES=155, PETRI_TRANSITIONS=212} [2024-05-12 13:14:34,766 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 99 predicate places. [2024-05-12 13:14:34,766 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 212 transitions, 2245 flow [2024-05-12 13:14:34,766 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 13:14:34,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:34,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:34,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-05-12 13:14:34,767 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:34,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:34,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1086460041, now seen corresponding path program 2 times [2024-05-12 13:14:34,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:34,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652889952] [2024-05-12 13:14:34,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:34,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:34,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:14:35,821 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 13:14:35,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:14:35,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652889952] [2024-05-12 13:14:35,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652889952] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:14:35,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:14:35,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:14:35,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004671566] [2024-05-12 13:14:35,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:14:35,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:14:35,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:14:35,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:14:35,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:14:35,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:14:35,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 212 transitions, 2245 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:35,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:14:35,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:14:35,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:37,420 INFO L124 PetriNetUnfolderBase]: 5798/9546 cut-off events. [2024-05-12 13:14:37,421 INFO L125 PetriNetUnfolderBase]: For 249938/249973 co-relation queries the response was YES. [2024-05-12 13:14:37,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55866 conditions, 9546 events. 5798/9546 cut-off events. For 249938/249973 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 63669 event pairs, 1929 based on Foata normal form. 35/9273 useless extension candidates. Maximal degree in co-relation 55796. Up to 7796 conditions per place. [2024-05-12 13:14:37,529 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 185 selfloop transitions, 50 changer transitions 0/259 dead transitions. [2024-05-12 13:14:37,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 259 transitions, 3061 flow [2024-05-12 13:14:37,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:14:37,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:14:37,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-05-12 13:14:37,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175 [2024-05-12 13:14:37,530 INFO L175 Difference]: Start difference. First operand has 155 places, 212 transitions, 2245 flow. Second operand 8 states and 207 transitions. [2024-05-12 13:14:37,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 259 transitions, 3061 flow [2024-05-12 13:14:37,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 259 transitions, 2954 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-05-12 13:14:37,750 INFO L231 Difference]: Finished difference. Result has 160 places, 216 transitions, 2343 flow [2024-05-12 13:14:37,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2138, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2343, PETRI_PLACES=160, PETRI_TRANSITIONS=216} [2024-05-12 13:14:37,750 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 104 predicate places. [2024-05-12 13:14:37,751 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 216 transitions, 2343 flow [2024-05-12 13:14:37,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:37,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:37,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:37,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-05-12 13:14:37,751 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:37,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:37,752 INFO L85 PathProgramCache]: Analyzing trace with hash -83136815, now seen corresponding path program 5 times [2024-05-12 13:14:37,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:37,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766370744] [2024-05-12 13:14:37,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:37,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:37,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:14:38,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:14:38,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:14:38,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766370744] [2024-05-12 13:14:38,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766370744] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:14:38,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:14:38,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:14:38,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848256366] [2024-05-12 13:14:38,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:14:38,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:14:38,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:14:38,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:14:38,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:14:38,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:14:38,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 216 transitions, 2343 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 13:14:38,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:14:38,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:14:38,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:40,082 INFO L124 PetriNetUnfolderBase]: 6099/9824 cut-off events. [2024-05-12 13:14:40,082 INFO L125 PetriNetUnfolderBase]: For 264483/264505 co-relation queries the response was YES. [2024-05-12 13:14:40,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59661 conditions, 9824 events. 6099/9824 cut-off events. For 264483/264505 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 63633 event pairs, 1911 based on Foata normal form. 21/9543 useless extension candidates. Maximal degree in co-relation 59589. Up to 7975 conditions per place. [2024-05-12 13:14:40,166 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 183 selfloop transitions, 74 changer transitions 0/266 dead transitions. [2024-05-12 13:14:40,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 266 transitions, 3382 flow [2024-05-12 13:14:40,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:14:40,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:14:40,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-05-12 13:14:40,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175 [2024-05-12 13:14:40,167 INFO L175 Difference]: Start difference. First operand has 160 places, 216 transitions, 2343 flow. Second operand 8 states and 207 transitions. [2024-05-12 13:14:40,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 266 transitions, 3382 flow [2024-05-12 13:14:40,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 266 transitions, 3207 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-05-12 13:14:40,395 INFO L231 Difference]: Finished difference. Result has 162 places, 220 transitions, 2422 flow [2024-05-12 13:14:40,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2168, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2422, PETRI_PLACES=162, PETRI_TRANSITIONS=220} [2024-05-12 13:14:40,396 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 106 predicate places. [2024-05-12 13:14:40,396 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 220 transitions, 2422 flow [2024-05-12 13:14:40,396 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 13:14:40,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:40,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:40,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-05-12 13:14:40,396 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:40,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:40,397 INFO L85 PathProgramCache]: Analyzing trace with hash -72660985, now seen corresponding path program 3 times [2024-05-12 13:14:40,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:40,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318252290] [2024-05-12 13:14:40,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:40,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:40,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:14:41,336 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 13:14:41,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:14:41,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318252290] [2024-05-12 13:14:41,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318252290] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:14:41,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:14:41,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:14:41,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884975149] [2024-05-12 13:14:41,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:14:41,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:14:41,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:14:41,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:14:41,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:14:41,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:14:41,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 220 transitions, 2422 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:41,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:14:41,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:14:41,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:42,746 INFO L124 PetriNetUnfolderBase]: 5918/9499 cut-off events. [2024-05-12 13:14:42,747 INFO L125 PetriNetUnfolderBase]: For 269643/269672 co-relation queries the response was YES. [2024-05-12 13:14:42,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58482 conditions, 9499 events. 5918/9499 cut-off events. For 269643/269672 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 61048 event pairs, 1844 based on Foata normal form. 29/9290 useless extension candidates. Maximal degree in co-relation 58409. Up to 7720 conditions per place. [2024-05-12 13:14:42,841 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 163 selfloop transitions, 95 changer transitions 0/283 dead transitions. [2024-05-12 13:14:42,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 283 transitions, 3742 flow [2024-05-12 13:14:42,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:14:42,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:14:42,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-05-12 13:14:42,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5275 [2024-05-12 13:14:42,842 INFO L175 Difference]: Start difference. First operand has 162 places, 220 transitions, 2422 flow. Second operand 8 states and 211 transitions. [2024-05-12 13:14:42,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 283 transitions, 3742 flow [2024-05-12 13:14:43,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 283 transitions, 3461 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-05-12 13:14:43,086 INFO L231 Difference]: Finished difference. Result has 165 places, 237 transitions, 2819 flow [2024-05-12 13:14:43,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2141, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2819, PETRI_PLACES=165, PETRI_TRANSITIONS=237} [2024-05-12 13:14:43,086 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 109 predicate places. [2024-05-12 13:14:43,086 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 237 transitions, 2819 flow [2024-05-12 13:14:43,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:43,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:43,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:43,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-05-12 13:14:43,087 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:43,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:43,087 INFO L85 PathProgramCache]: Analyzing trace with hash -83136505, now seen corresponding path program 4 times [2024-05-12 13:14:43,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:43,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566876472] [2024-05-12 13:14:43,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:43,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:43,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:14:44,135 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 13:14:44,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:14:44,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566876472] [2024-05-12 13:14:44,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566876472] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:14:44,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:14:44,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:14:44,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620686071] [2024-05-12 13:14:44,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:14:44,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:14:44,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:14:44,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:14:44,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:14:44,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:14:44,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 237 transitions, 2819 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:44,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:14:44,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:14:44,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:45,590 INFO L124 PetriNetUnfolderBase]: 5909/9719 cut-off events. [2024-05-12 13:14:45,591 INFO L125 PetriNetUnfolderBase]: For 287536/287568 co-relation queries the response was YES. [2024-05-12 13:14:45,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60274 conditions, 9719 events. 5909/9719 cut-off events. For 287536/287568 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 65065 event pairs, 1936 based on Foata normal form. 32/9435 useless extension candidates. Maximal degree in co-relation 60200. Up to 7936 conditions per place. [2024-05-12 13:14:45,691 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 215 selfloop transitions, 45 changer transitions 0/285 dead transitions. [2024-05-12 13:14:45,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 285 transitions, 3773 flow [2024-05-12 13:14:45,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:14:45,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:14:45,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-05-12 13:14:45,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-05-12 13:14:45,693 INFO L175 Difference]: Start difference. First operand has 165 places, 237 transitions, 2819 flow. Second operand 8 states and 208 transitions. [2024-05-12 13:14:45,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 285 transitions, 3773 flow [2024-05-12 13:14:46,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 285 transitions, 3460 flow, removed 147 selfloop flow, removed 2 redundant places. [2024-05-12 13:14:46,139 INFO L231 Difference]: Finished difference. Result has 171 places, 241 transitions, 2717 flow [2024-05-12 13:14:46,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2572, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2717, PETRI_PLACES=171, PETRI_TRANSITIONS=241} [2024-05-12 13:14:46,139 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 115 predicate places. [2024-05-12 13:14:46,139 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 241 transitions, 2717 flow [2024-05-12 13:14:46,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:46,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:46,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:46,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-05-12 13:14:46,140 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:46,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:46,140 INFO L85 PathProgramCache]: Analyzing trace with hash -83145433, now seen corresponding path program 4 times [2024-05-12 13:14:46,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:46,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788883530] [2024-05-12 13:14:46,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:46,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:46,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:14:46,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:14:46,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:14:46,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788883530] [2024-05-12 13:14:46,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788883530] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:14:46,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:14:46,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:14:46,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150829099] [2024-05-12 13:14:46,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:14:46,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:14:46,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:14:46,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:14:46,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:14:47,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:14:47,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 241 transitions, 2717 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:47,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:14:47,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:14:47,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:48,283 INFO L124 PetriNetUnfolderBase]: 5826/9315 cut-off events. [2024-05-12 13:14:48,283 INFO L125 PetriNetUnfolderBase]: For 267195/267419 co-relation queries the response was YES. [2024-05-12 13:14:48,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57979 conditions, 9315 events. 5826/9315 cut-off events. For 267195/267419 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 59731 event pairs, 1744 based on Foata normal form. 40/9069 useless extension candidates. Maximal degree in co-relation 57903. Up to 7744 conditions per place. [2024-05-12 13:14:48,373 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 200 selfloop transitions, 42 changer transitions 0/287 dead transitions. [2024-05-12 13:14:48,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 287 transitions, 3453 flow [2024-05-12 13:14:48,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:14:48,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:14:48,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-05-12 13:14:48,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-05-12 13:14:48,374 INFO L175 Difference]: Start difference. First operand has 171 places, 241 transitions, 2717 flow. Second operand 8 states and 204 transitions. [2024-05-12 13:14:48,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 287 transitions, 3453 flow [2024-05-12 13:14:48,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 287 transitions, 3346 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-05-12 13:14:48,651 INFO L231 Difference]: Finished difference. Result has 173 places, 244 transitions, 2802 flow [2024-05-12 13:14:48,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2610, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2802, PETRI_PLACES=173, PETRI_TRANSITIONS=244} [2024-05-12 13:14:48,652 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 117 predicate places. [2024-05-12 13:14:48,652 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 244 transitions, 2802 flow [2024-05-12 13:14:48,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:48,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:48,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:48,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-05-12 13:14:48,652 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:48,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:48,653 INFO L85 PathProgramCache]: Analyzing trace with hash -83145185, now seen corresponding path program 6 times [2024-05-12 13:14:48,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:48,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884238629] [2024-05-12 13:14:48,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:48,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:48,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:14:49,488 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 13:14:49,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:14:49,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884238629] [2024-05-12 13:14:49,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884238629] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:14:49,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:14:49,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:14:49,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110054161] [2024-05-12 13:14:49,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:14:49,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:14:49,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:14:49,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:14:49,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:14:49,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:14:49,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 244 transitions, 2802 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 13:14:49,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:14:49,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:14:49,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:50,961 INFO L124 PetriNetUnfolderBase]: 6187/9894 cut-off events. [2024-05-12 13:14:50,962 INFO L125 PetriNetUnfolderBase]: For 291610/291632 co-relation queries the response was YES. [2024-05-12 13:14:51,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61678 conditions, 9894 events. 6187/9894 cut-off events. For 291610/291632 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 63672 event pairs, 1916 based on Foata normal form. 21/9633 useless extension candidates. Maximal degree in co-relation 61601. Up to 8101 conditions per place. [2024-05-12 13:14:51,070 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 207 selfloop transitions, 73 changer transitions 0/289 dead transitions. [2024-05-12 13:14:51,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 289 transitions, 3768 flow [2024-05-12 13:14:51,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:14:51,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:14:51,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-05-12 13:14:51,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-05-12 13:14:51,071 INFO L175 Difference]: Start difference. First operand has 173 places, 244 transitions, 2802 flow. Second operand 8 states and 205 transitions. [2024-05-12 13:14:51,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 289 transitions, 3768 flow [2024-05-12 13:14:51,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 289 transitions, 3544 flow, removed 72 selfloop flow, removed 6 redundant places. [2024-05-12 13:14:51,396 INFO L231 Difference]: Finished difference. Result has 175 places, 244 transitions, 2734 flow [2024-05-12 13:14:51,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2578, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2734, PETRI_PLACES=175, PETRI_TRANSITIONS=244} [2024-05-12 13:14:51,396 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 119 predicate places. [2024-05-12 13:14:51,396 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 244 transitions, 2734 flow [2024-05-12 13:14:51,397 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 13:14:51,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:51,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:51,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-05-12 13:14:51,397 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:51,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:51,397 INFO L85 PathProgramCache]: Analyzing trace with hash 392741899, now seen corresponding path program 1 times [2024-05-12 13:14:51,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:51,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472457008] [2024-05-12 13:14:51,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:51,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:51,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:14:52,067 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 13:14:52,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:14:52,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472457008] [2024-05-12 13:14:52,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472457008] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:14:52,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:14:52,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:14:52,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898147510] [2024-05-12 13:14:52,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:14:52,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:14:52,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:14:52,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:14:52,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:14:52,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:14:52,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 244 transitions, 2734 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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 13:14:52,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:14:52,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:14:52,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:53,394 INFO L124 PetriNetUnfolderBase]: 5220/8326 cut-off events. [2024-05-12 13:14:53,394 INFO L125 PetriNetUnfolderBase]: For 248701/248719 co-relation queries the response was YES. [2024-05-12 13:14:53,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53154 conditions, 8326 events. 5220/8326 cut-off events. For 248701/248719 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 53214 event pairs, 1720 based on Foata normal form. 20/8220 useless extension candidates. Maximal degree in co-relation 53076. Up to 7248 conditions per place. [2024-05-12 13:14:53,481 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 224 selfloop transitions, 17 changer transitions 0/267 dead transitions. [2024-05-12 13:14:53,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 267 transitions, 3308 flow [2024-05-12 13:14:53,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:14:53,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:14:53,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-05-12 13:14:53,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49333333333333335 [2024-05-12 13:14:53,482 INFO L175 Difference]: Start difference. First operand has 175 places, 244 transitions, 2734 flow. Second operand 6 states and 148 transitions. [2024-05-12 13:14:53,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 267 transitions, 3308 flow [2024-05-12 13:14:53,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 267 transitions, 3161 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-05-12 13:14:53,699 INFO L231 Difference]: Finished difference. Result has 175 places, 247 transitions, 2668 flow [2024-05-12 13:14:53,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2587, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2668, PETRI_PLACES=175, PETRI_TRANSITIONS=247} [2024-05-12 13:14:53,699 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 119 predicate places. [2024-05-12 13:14:53,699 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 247 transitions, 2668 flow [2024-05-12 13:14:53,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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 13:14:53,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:53,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:53,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-05-12 13:14:53,699 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:53,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:53,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1321450601, now seen corresponding path program 1 times [2024-05-12 13:14:53,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:53,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398309550] [2024-05-12 13:14:53,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:53,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:53,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:14:54,718 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 13:14:54,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:14:54,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398309550] [2024-05-12 13:14:54,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398309550] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:14:54,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:14:54,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:14:54,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009223409] [2024-05-12 13:14:54,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:14:54,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:14:54,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:14:54,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:14:54,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:14:54,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:14:54,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 247 transitions, 2668 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:54,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:14:54,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:14:54,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:56,326 INFO L124 PetriNetUnfolderBase]: 5758/8953 cut-off events. [2024-05-12 13:14:56,326 INFO L125 PetriNetUnfolderBase]: For 289933/290039 co-relation queries the response was YES. [2024-05-12 13:14:56,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58672 conditions, 8953 events. 5758/8953 cut-off events. For 289933/290039 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 55968 event pairs, 1811 based on Foata normal form. 44/8834 useless extension candidates. Maximal degree in co-relation 58593. Up to 7863 conditions per place. [2024-05-12 13:14:56,418 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 237 selfloop transitions, 25 changer transitions 0/307 dead transitions. [2024-05-12 13:14:56,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 307 transitions, 3464 flow [2024-05-12 13:14:56,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:14:56,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:14:56,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-05-12 13:14:56,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5066666666666667 [2024-05-12 13:14:56,419 INFO L175 Difference]: Start difference. First operand has 175 places, 247 transitions, 2668 flow. Second operand 9 states and 228 transitions. [2024-05-12 13:14:56,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 307 transitions, 3464 flow [2024-05-12 13:14:56,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 307 transitions, 3407 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-05-12 13:14:56,684 INFO L231 Difference]: Finished difference. Result has 181 places, 254 transitions, 2818 flow [2024-05-12 13:14:56,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2611, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2818, PETRI_PLACES=181, PETRI_TRANSITIONS=254} [2024-05-12 13:14:56,685 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 125 predicate places. [2024-05-12 13:14:56,685 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 254 transitions, 2818 flow [2024-05-12 13:14:56,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:56,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:56,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:56,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-05-12 13:14:56,685 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:56,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:56,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1321571718, now seen corresponding path program 1 times [2024-05-12 13:14:56,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:56,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709563464] [2024-05-12 13:14:56,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:56,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:56,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:14:57,512 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 13:14:57,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:14:57,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709563464] [2024-05-12 13:14:57,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709563464] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:14:57,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:14:57,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:14:57,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509248875] [2024-05-12 13:14:57,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:14:57,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:14:57,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:14:57,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:14:57,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:14:57,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:14:57,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 254 transitions, 2818 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:57,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:14:57,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:14:57,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:59,107 INFO L124 PetriNetUnfolderBase]: 6342/9632 cut-off events. [2024-05-12 13:14:59,108 INFO L125 PetriNetUnfolderBase]: For 322738/322738 co-relation queries the response was YES. [2024-05-12 13:14:59,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63740 conditions, 9632 events. 6342/9632 cut-off events. For 322738/322738 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 58765 event pairs, 1950 based on Foata normal form. 6/9491 useless extension candidates. Maximal degree in co-relation 63659. Up to 8718 conditions per place. [2024-05-12 13:14:59,210 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 275 selfloop transitions, 40 changer transitions 0/324 dead transitions. [2024-05-12 13:14:59,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 324 transitions, 4120 flow [2024-05-12 13:14:59,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:14:59,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:14:59,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-05-12 13:14:59,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5133333333333333 [2024-05-12 13:14:59,211 INFO L175 Difference]: Start difference. First operand has 181 places, 254 transitions, 2818 flow. Second operand 9 states and 231 transitions. [2024-05-12 13:14:59,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 324 transitions, 4120 flow [2024-05-12 13:14:59,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 324 transitions, 3971 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-05-12 13:14:59,498 INFO L231 Difference]: Finished difference. Result has 186 places, 266 transitions, 3021 flow [2024-05-12 13:14:59,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2669, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3021, PETRI_PLACES=186, PETRI_TRANSITIONS=266} [2024-05-12 13:14:59,498 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 130 predicate places. [2024-05-12 13:14:59,499 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 266 transitions, 3021 flow [2024-05-12 13:14:59,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:59,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:59,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:59,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-05-12 13:14:59,499 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:59,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:59,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1280643344, now seen corresponding path program 2 times [2024-05-12 13:14:59,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:59,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511969583] [2024-05-12 13:14:59,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:59,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:59,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:15:00,368 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 13:15:00,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:15:00,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511969583] [2024-05-12 13:15:00,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511969583] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:15:00,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:15:00,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:15:00,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543831723] [2024-05-12 13:15:00,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:15:00,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:15:00,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:15:00,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:15:00,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:15:00,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:15:00,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 266 transitions, 3021 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:00,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:15:00,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:15:00,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:15:02,172 INFO L124 PetriNetUnfolderBase]: 6602/10048 cut-off events. [2024-05-12 13:15:02,172 INFO L125 PetriNetUnfolderBase]: For 373097/373097 co-relation queries the response was YES. [2024-05-12 13:15:02,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69836 conditions, 10048 events. 6602/10048 cut-off events. For 373097/373097 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 61906 event pairs, 1954 based on Foata normal form. 6/9898 useless extension candidates. Maximal degree in co-relation 69752. Up to 8737 conditions per place. [2024-05-12 13:15:02,280 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 268 selfloop transitions, 60 changer transitions 0/337 dead transitions. [2024-05-12 13:15:02,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 337 transitions, 4515 flow [2024-05-12 13:15:02,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:15:02,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:15:02,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-05-12 13:15:02,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-05-12 13:15:02,282 INFO L175 Difference]: Start difference. First operand has 186 places, 266 transitions, 3021 flow. Second operand 9 states and 234 transitions. [2024-05-12 13:15:02,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 337 transitions, 4515 flow [2024-05-12 13:15:02,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 337 transitions, 4341 flow, removed 73 selfloop flow, removed 4 redundant places. [2024-05-12 13:15:02,733 INFO L231 Difference]: Finished difference. Result has 192 places, 278 transitions, 3300 flow [2024-05-12 13:15:02,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2847, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3300, PETRI_PLACES=192, PETRI_TRANSITIONS=278} [2024-05-12 13:15:02,733 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 136 predicate places. [2024-05-12 13:15:02,733 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 278 transitions, 3300 flow [2024-05-12 13:15:02,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:02,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:15:02,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:15:02,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-05-12 13:15:02,734 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:15:02,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:15:02,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1280643623, now seen corresponding path program 1 times [2024-05-12 13:15:02,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:15:02,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73172163] [2024-05-12 13:15:02,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:15:02,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:15:02,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:15:03,654 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 13:15:03,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:15:03,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73172163] [2024-05-12 13:15:03,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73172163] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:15:03,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:15:03,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:15:03,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098025930] [2024-05-12 13:15:03,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:15:03,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:15:03,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:15:03,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:15:03,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:15:03,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:15:03,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 278 transitions, 3300 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:03,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:15:03,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:15:03,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:15:05,467 INFO L124 PetriNetUnfolderBase]: 6669/10150 cut-off events. [2024-05-12 13:15:05,468 INFO L125 PetriNetUnfolderBase]: For 395019/395019 co-relation queries the response was YES. [2024-05-12 13:15:05,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72401 conditions, 10150 events. 6669/10150 cut-off events. For 395019/395019 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 62572 event pairs, 1960 based on Foata normal form. 3/9993 useless extension candidates. Maximal degree in co-relation 72314. Up to 9223 conditions per place. [2024-05-12 13:15:05,571 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 288 selfloop transitions, 54 changer transitions 0/351 dead transitions. [2024-05-12 13:15:05,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 351 transitions, 4806 flow [2024-05-12 13:15:05,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:15:05,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:15:05,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-05-12 13:15:05,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5088888888888888 [2024-05-12 13:15:05,573 INFO L175 Difference]: Start difference. First operand has 192 places, 278 transitions, 3300 flow. Second operand 9 states and 229 transitions. [2024-05-12 13:15:05,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 351 transitions, 4806 flow [2024-05-12 13:15:05,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 351 transitions, 4629 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-05-12 13:15:05,926 INFO L231 Difference]: Finished difference. Result has 200 places, 293 transitions, 3654 flow [2024-05-12 13:15:05,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3137, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3654, PETRI_PLACES=200, PETRI_TRANSITIONS=293} [2024-05-12 13:15:05,926 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 144 predicate places. [2024-05-12 13:15:05,926 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 293 transitions, 3654 flow [2024-05-12 13:15:05,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:05,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:15:05,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:15:05,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-05-12 13:15:05,927 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:15:05,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:15:05,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1326242178, now seen corresponding path program 3 times [2024-05-12 13:15:05,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:15:05,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645815989] [2024-05-12 13:15:05,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:15:05,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:15:05,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:15:06,803 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 13:15:06,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:15:06,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645815989] [2024-05-12 13:15:06,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645815989] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:15:06,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:15:06,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:15:06,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755737599] [2024-05-12 13:15:06,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:15:06,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:15:06,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:15:06,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:15:06,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:15:06,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:15:06,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 293 transitions, 3654 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:06,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:15:06,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:15:06,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:15:08,705 INFO L124 PetriNetUnfolderBase]: 6657/10161 cut-off events. [2024-05-12 13:15:08,705 INFO L125 PetriNetUnfolderBase]: For 408903/408903 co-relation queries the response was YES. [2024-05-12 13:15:08,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72818 conditions, 10161 events. 6657/10161 cut-off events. For 408903/408903 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 62893 event pairs, 1945 based on Foata normal form. 6/9999 useless extension candidates. Maximal degree in co-relation 72726. Up to 8824 conditions per place. [2024-05-12 13:15:08,821 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 287 selfloop transitions, 55 changer transitions 0/351 dead transitions. [2024-05-12 13:15:08,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 351 transitions, 4834 flow [2024-05-12 13:15:08,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:15:08,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:15:08,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-05-12 13:15:08,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5177777777777778 [2024-05-12 13:15:08,822 INFO L175 Difference]: Start difference. First operand has 200 places, 293 transitions, 3654 flow. Second operand 9 states and 233 transitions. [2024-05-12 13:15:08,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 351 transitions, 4834 flow [2024-05-12 13:15:09,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 351 transitions, 4543 flow, removed 132 selfloop flow, removed 3 redundant places. [2024-05-12 13:15:09,327 INFO L231 Difference]: Finished difference. Result has 206 places, 293 transitions, 3483 flow [2024-05-12 13:15:09,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3363, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3483, PETRI_PLACES=206, PETRI_TRANSITIONS=293} [2024-05-12 13:15:09,328 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 150 predicate places. [2024-05-12 13:15:09,328 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 293 transitions, 3483 flow [2024-05-12 13:15:09,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:09,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:15:09,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:15:09,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-05-12 13:15:09,329 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:15:09,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:15:09,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1499633517, now seen corresponding path program 2 times [2024-05-12 13:15:09,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:15:09,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398358754] [2024-05-12 13:15:09,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:15:09,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:15:09,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:15:10,407 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 13:15:10,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:15:10,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398358754] [2024-05-12 13:15:10,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398358754] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:15:10,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:15:10,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:15:10,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021728559] [2024-05-12 13:15:10,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:15:10,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:15:10,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:15:10,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:15:10,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:15:10,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:15:10,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 293 transitions, 3483 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:10,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:15:10,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:15:10,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:15:12,279 INFO L124 PetriNetUnfolderBase]: 6699/10162 cut-off events. [2024-05-12 13:15:12,279 INFO L125 PetriNetUnfolderBase]: For 416372/416372 co-relation queries the response was YES. [2024-05-12 13:15:12,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73319 conditions, 10162 events. 6699/10162 cut-off events. For 416372/416372 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 62243 event pairs, 1955 based on Foata normal form. 3/10013 useless extension candidates. Maximal degree in co-relation 73225. Up to 9120 conditions per place. [2024-05-12 13:15:12,399 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 289 selfloop transitions, 52 changer transitions 0/350 dead transitions. [2024-05-12 13:15:12,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 350 transitions, 4701 flow [2024-05-12 13:15:12,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:15:12,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:15:12,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-05-12 13:15:12,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5044444444444445 [2024-05-12 13:15:12,400 INFO L175 Difference]: Start difference. First operand has 206 places, 293 transitions, 3483 flow. Second operand 9 states and 227 transitions. [2024-05-12 13:15:12,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 350 transitions, 4701 flow [2024-05-12 13:15:12,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 350 transitions, 4517 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-05-12 13:15:12,809 INFO L231 Difference]: Finished difference. Result has 206 places, 297 transitions, 3534 flow [2024-05-12 13:15:12,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3299, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3534, PETRI_PLACES=206, PETRI_TRANSITIONS=297} [2024-05-12 13:15:12,810 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 150 predicate places. [2024-05-12 13:15:12,810 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 297 transitions, 3534 flow [2024-05-12 13:15:12,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:12,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:15:12,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:15:12,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-05-12 13:15:12,810 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:15:12,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:15:12,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1499633238, now seen corresponding path program 4 times [2024-05-12 13:15:12,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:15:12,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074573591] [2024-05-12 13:15:12,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:15:12,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:15:12,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:15:13,663 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 13:15:13,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:15:13,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074573591] [2024-05-12 13:15:13,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074573591] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:15:13,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:15:13,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:15:13,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746950078] [2024-05-12 13:15:13,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:15:13,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:15:13,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:15:13,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:15:13,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:15:13,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:15:13,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 297 transitions, 3534 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:13,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:15:13,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:15:13,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:15:15,518 INFO L124 PetriNetUnfolderBase]: 7015/10685 cut-off events. [2024-05-12 13:15:15,518 INFO L125 PetriNetUnfolderBase]: For 471706/471706 co-relation queries the response was YES. [2024-05-12 13:15:15,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78809 conditions, 10685 events. 7015/10685 cut-off events. For 471706/471706 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 66355 event pairs, 1956 based on Foata normal form. 6/10525 useless extension candidates. Maximal degree in co-relation 78716. Up to 8799 conditions per place. [2024-05-12 13:15:15,652 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 283 selfloop transitions, 78 changer transitions 0/370 dead transitions. [2024-05-12 13:15:15,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 370 transitions, 5336 flow [2024-05-12 13:15:15,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:15:15,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:15:15,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-05-12 13:15:15,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5288888888888889 [2024-05-12 13:15:15,653 INFO L175 Difference]: Start difference. First operand has 206 places, 297 transitions, 3534 flow. Second operand 9 states and 238 transitions. [2024-05-12 13:15:15,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 370 transitions, 5336 flow [2024-05-12 13:15:16,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 370 transitions, 5131 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-05-12 13:15:16,323 INFO L231 Difference]: Finished difference. Result has 210 places, 309 transitions, 3862 flow [2024-05-12 13:15:16,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3329, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3862, PETRI_PLACES=210, PETRI_TRANSITIONS=309} [2024-05-12 13:15:16,324 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 154 predicate places. [2024-05-12 13:15:16,324 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 309 transitions, 3862 flow [2024-05-12 13:15:16,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:16,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:15:16,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:15:16,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-05-12 13:15:16,325 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:15:16,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:15:16,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1499625798, now seen corresponding path program 5 times [2024-05-12 13:15:16,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:15:16,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570479360] [2024-05-12 13:15:16,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:15:16,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:15:16,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:15:17,192 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 13:15:17,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:15:17,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570479360] [2024-05-12 13:15:17,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570479360] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:15:17,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:15:17,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:15:17,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089102457] [2024-05-12 13:15:17,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:15:17,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:15:17,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:15:17,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:15:17,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:15:17,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:15:17,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 309 transitions, 3862 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:17,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:15:17,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:15:17,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:15:19,321 INFO L124 PetriNetUnfolderBase]: 7003/10684 cut-off events. [2024-05-12 13:15:19,322 INFO L125 PetriNetUnfolderBase]: For 497979/497979 co-relation queries the response was YES. [2024-05-12 13:15:19,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80744 conditions, 10684 events. 7003/10684 cut-off events. For 497979/497979 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 66521 event pairs, 1964 based on Foata normal form. 6/10517 useless extension candidates. Maximal degree in co-relation 80648. Up to 8793 conditions per place. [2024-05-12 13:15:19,453 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 282 selfloop transitions, 77 changer transitions 0/368 dead transitions. [2024-05-12 13:15:19,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 368 transitions, 5266 flow [2024-05-12 13:15:19,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:15:19,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:15:19,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-05-12 13:15:19,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5222222222222223 [2024-05-12 13:15:19,455 INFO L175 Difference]: Start difference. First operand has 210 places, 309 transitions, 3862 flow. Second operand 9 states and 235 transitions. [2024-05-12 13:15:19,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 368 transitions, 5266 flow [2024-05-12 13:15:20,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 368 transitions, 4973 flow, removed 115 selfloop flow, removed 4 redundant places. [2024-05-12 13:15:20,202 INFO L231 Difference]: Finished difference. Result has 215 places, 309 transitions, 3733 flow [2024-05-12 13:15:20,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3569, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3733, PETRI_PLACES=215, PETRI_TRANSITIONS=309} [2024-05-12 13:15:20,203 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 159 predicate places. [2024-05-12 13:15:20,203 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 309 transitions, 3733 flow [2024-05-12 13:15:20,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:20,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:15:20,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:15:20,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-05-12 13:15:20,203 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:15:20,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:15:20,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1454286713, now seen corresponding path program 3 times [2024-05-12 13:15:20,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:15:20,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824340634] [2024-05-12 13:15:20,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:15:20,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:15:20,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:15:21,307 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 13:15:21,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:15:21,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824340634] [2024-05-12 13:15:21,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824340634] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:15:21,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:15:21,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:15:21,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676694227] [2024-05-12 13:15:21,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:15:21,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:15:21,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:15:21,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:15:21,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:15:21,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:15:21,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 309 transitions, 3733 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:21,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:15:21,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:15:21,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:15:23,276 INFO L124 PetriNetUnfolderBase]: 7045/10710 cut-off events. [2024-05-12 13:15:23,276 INFO L125 PetriNetUnfolderBase]: For 493032/493032 co-relation queries the response was YES. [2024-05-12 13:15:23,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80587 conditions, 10710 events. 7045/10710 cut-off events. For 493032/493032 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 66246 event pairs, 2004 based on Foata normal form. 3/10547 useless extension candidates. Maximal degree in co-relation 80489. Up to 9596 conditions per place. [2024-05-12 13:15:23,399 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 299 selfloop transitions, 57 changer transitions 0/365 dead transitions. [2024-05-12 13:15:23,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 365 transitions, 4929 flow [2024-05-12 13:15:23,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:15:23,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:15:23,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-05-12 13:15:23,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5022222222222222 [2024-05-12 13:15:23,400 INFO L175 Difference]: Start difference. First operand has 215 places, 309 transitions, 3733 flow. Second operand 9 states and 226 transitions. [2024-05-12 13:15:23,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 365 transitions, 4929 flow [2024-05-12 13:15:23,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 365 transitions, 4750 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-05-12 13:15:23,910 INFO L231 Difference]: Finished difference. Result has 216 places, 313 transitions, 3813 flow [2024-05-12 13:15:23,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3554, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3813, PETRI_PLACES=216, PETRI_TRANSITIONS=313} [2024-05-12 13:15:23,910 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 160 predicate places. [2024-05-12 13:15:23,910 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 313 transitions, 3813 flow [2024-05-12 13:15:23,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:23,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:15:23,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:15:23,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-05-12 13:15:23,911 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:15:23,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:15:23,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1454286434, now seen corresponding path program 6 times [2024-05-12 13:15:23,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:15:23,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938124765] [2024-05-12 13:15:23,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:15:23,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:15:23,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:15:24,756 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 13:15:24,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:15:24,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938124765] [2024-05-12 13:15:24,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938124765] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:15:24,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:15:24,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:15:24,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332845150] [2024-05-12 13:15:24,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:15:24,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:15:24,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:15:24,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:15:24,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:15:24,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:15:24,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 313 transitions, 3813 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:24,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:15:24,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:15:24,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:15:26,831 INFO L124 PetriNetUnfolderBase]: 7073/10753 cut-off events. [2024-05-12 13:15:26,831 INFO L125 PetriNetUnfolderBase]: For 512341/512341 co-relation queries the response was YES. [2024-05-12 13:15:26,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81342 conditions, 10753 events. 7073/10753 cut-off events. For 512341/512341 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 66771 event pairs, 1902 based on Foata normal form. 6/10598 useless extension candidates. Maximal degree in co-relation 81244. Up to 8880 conditions per place. [2024-05-12 13:15:26,957 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 269 selfloop transitions, 94 changer transitions 0/372 dead transitions. [2024-05-12 13:15:26,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 372 transitions, 5043 flow [2024-05-12 13:15:26,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:15:26,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:15:26,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-05-12 13:15:26,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5155555555555555 [2024-05-12 13:15:26,959 INFO L175 Difference]: Start difference. First operand has 216 places, 313 transitions, 3813 flow. Second operand 9 states and 232 transitions. [2024-05-12 13:15:26,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 372 transitions, 5043 flow [2024-05-12 13:15:27,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 372 transitions, 4814 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-05-12 13:15:27,546 INFO L231 Difference]: Finished difference. Result has 218 places, 317 transitions, 3909 flow [2024-05-12 13:15:27,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3584, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3909, PETRI_PLACES=218, PETRI_TRANSITIONS=317} [2024-05-12 13:15:27,547 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 162 predicate places. [2024-05-12 13:15:27,547 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 317 transitions, 3909 flow [2024-05-12 13:15:27,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:27,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:15:27,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:15:27,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-05-12 13:15:27,548 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:15:27,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:15:27,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1108075858, now seen corresponding path program 1 times [2024-05-12 13:15:27,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:15:27,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065065405] [2024-05-12 13:15:27,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:15:27,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:15:27,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:15:28,603 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 13:15:28,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:15:28,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065065405] [2024-05-12 13:15:28,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065065405] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:15:28,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:15:28,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:15:28,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242538635] [2024-05-12 13:15:28,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:15:28,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:15:28,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:15:28,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:15:28,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:15:28,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:15:28,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 317 transitions, 3909 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:28,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:15:28,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:15:28,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:15:30,590 INFO L124 PetriNetUnfolderBase]: 6865/10538 cut-off events. [2024-05-12 13:15:30,591 INFO L125 PetriNetUnfolderBase]: For 535761/535781 co-relation queries the response was YES. [2024-05-12 13:15:30,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80335 conditions, 10538 events. 6865/10538 cut-off events. For 535761/535781 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 66364 event pairs, 2020 based on Foata normal form. 26/10407 useless extension candidates. Maximal degree in co-relation 80236. Up to 9327 conditions per place. [2024-05-12 13:15:30,713 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 313 selfloop transitions, 33 changer transitions 0/377 dead transitions. [2024-05-12 13:15:30,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 377 transitions, 5109 flow [2024-05-12 13:15:30,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:15:30,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:15:30,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-05-12 13:15:30,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5133333333333333 [2024-05-12 13:15:30,714 INFO L175 Difference]: Start difference. First operand has 218 places, 317 transitions, 3909 flow. Second operand 9 states and 231 transitions. [2024-05-12 13:15:30,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 377 transitions, 5109 flow [2024-05-12 13:15:31,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 377 transitions, 4866 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-05-12 13:15:31,322 INFO L231 Difference]: Finished difference. Result has 222 places, 324 transitions, 3901 flow [2024-05-12 13:15:31,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3666, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3901, PETRI_PLACES=222, PETRI_TRANSITIONS=324} [2024-05-12 13:15:31,323 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 166 predicate places. [2024-05-12 13:15:31,323 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 324 transitions, 3901 flow [2024-05-12 13:15:31,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:31,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:15:31,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:15:31,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-05-12 13:15:31,324 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:15:31,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:15:31,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1454296013, now seen corresponding path program 4 times [2024-05-12 13:15:31,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:15:31,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746163315] [2024-05-12 13:15:31,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:15:31,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:15:31,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:15:32,345 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 13:15:32,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:15:32,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746163315] [2024-05-12 13:15:32,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746163315] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:15:32,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:15:32,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:15:32,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333253391] [2024-05-12 13:15:32,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:15:32,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:15:32,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:15:32,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:15:32,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:15:32,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:15:32,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 324 transitions, 3901 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:32,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:15:32,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:15:32,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:15:34,413 INFO L124 PetriNetUnfolderBase]: 7203/10934 cut-off events. [2024-05-12 13:15:34,413 INFO L125 PetriNetUnfolderBase]: For 550307/550307 co-relation queries the response was YES. [2024-05-12 13:15:34,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83547 conditions, 10934 events. 7203/10934 cut-off events. For 550307/550307 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 67667 event pairs, 2004 based on Foata normal form. 3/10773 useless extension candidates. Maximal degree in co-relation 83446. Up to 9704 conditions per place. [2024-05-12 13:15:34,547 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 310 selfloop transitions, 73 changer transitions 0/392 dead transitions. [2024-05-12 13:15:34,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 392 transitions, 5233 flow [2024-05-12 13:15:34,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:15:34,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:15:34,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 251 transitions. [2024-05-12 13:15:34,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.502 [2024-05-12 13:15:34,548 INFO L175 Difference]: Start difference. First operand has 222 places, 324 transitions, 3901 flow. Second operand 10 states and 251 transitions. [2024-05-12 13:15:34,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 392 transitions, 5233 flow [2024-05-12 13:15:35,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 392 transitions, 5054 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-05-12 13:15:35,145 INFO L231 Difference]: Finished difference. Result has 227 places, 332 transitions, 4075 flow [2024-05-12 13:15:35,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3722, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4075, PETRI_PLACES=227, PETRI_TRANSITIONS=332} [2024-05-12 13:15:35,145 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 171 predicate places. [2024-05-12 13:15:35,145 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 332 transitions, 4075 flow [2024-05-12 13:15:35,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:35,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:15:35,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:15:35,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-05-12 13:15:35,146 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:15:35,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:15:35,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1796709687, now seen corresponding path program 1 times [2024-05-12 13:15:35,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:15:35,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76392456] [2024-05-12 13:15:35,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:15:35,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:15:35,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:15:35,824 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 13:15:35,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:15:35,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76392456] [2024-05-12 13:15:35,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76392456] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:15:35,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:15:35,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:15:35,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952094457] [2024-05-12 13:15:35,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:15:35,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:15:35,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:15:35,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:15:35,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:15:35,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:15:35,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 332 transitions, 4075 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:35,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:15:35,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:15:35,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:15:37,775 INFO L124 PetriNetUnfolderBase]: 6932/10641 cut-off events. [2024-05-12 13:15:37,775 INFO L125 PetriNetUnfolderBase]: For 558678/558698 co-relation queries the response was YES. [2024-05-12 13:15:37,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81851 conditions, 10641 events. 6932/10641 cut-off events. For 558678/558698 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 67139 event pairs, 2051 based on Foata normal form. 21/10502 useless extension candidates. Maximal degree in co-relation 81748. Up to 9541 conditions per place. [2024-05-12 13:15:37,904 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 301 selfloop transitions, 30 changer transitions 0/364 dead transitions. [2024-05-12 13:15:37,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 364 transitions, 5014 flow [2024-05-12 13:15:37,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:15:37,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:15:37,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-05-12 13:15:37,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5033333333333333 [2024-05-12 13:15:37,905 INFO L175 Difference]: Start difference. First operand has 227 places, 332 transitions, 4075 flow. Second operand 6 states and 151 transitions. [2024-05-12 13:15:37,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 364 transitions, 5014 flow [2024-05-12 13:15:38,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 364 transitions, 4772 flow, removed 70 selfloop flow, removed 6 redundant places. [2024-05-12 13:15:38,551 INFO L231 Difference]: Finished difference. Result has 227 places, 338 transitions, 4023 flow [2024-05-12 13:15:38,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3840, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4023, PETRI_PLACES=227, PETRI_TRANSITIONS=338} [2024-05-12 13:15:38,551 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 171 predicate places. [2024-05-12 13:15:38,551 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 338 transitions, 4023 flow [2024-05-12 13:15:38,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:38,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:15:38,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:15:38,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-05-12 13:15:38,552 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:15:38,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:15:38,552 INFO L85 PathProgramCache]: Analyzing trace with hash 2031426649, now seen corresponding path program 5 times [2024-05-12 13:15:38,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:15:38,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490349203] [2024-05-12 13:15:38,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:15:38,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:15:38,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:15:39,698 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 13:15:39,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:15:39,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490349203] [2024-05-12 13:15:39,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490349203] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:15:39,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:15:39,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:15:39,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269201974] [2024-05-12 13:15:39,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:15:39,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:15:39,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:15:39,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:15:39,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:15:39,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:15:39,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 338 transitions, 4023 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:39,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:15:39,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:15:39,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:15:41,676 INFO L124 PetriNetUnfolderBase]: 7262/11452 cut-off events. [2024-05-12 13:15:41,676 INFO L125 PetriNetUnfolderBase]: For 554638/554661 co-relation queries the response was YES. [2024-05-12 13:15:41,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84045 conditions, 11452 events. 7262/11452 cut-off events. For 554638/554661 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 74022 event pairs, 1864 based on Foata normal form. 23/11182 useless extension candidates. Maximal degree in co-relation 83941. Up to 9545 conditions per place. [2024-05-12 13:15:41,819 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 291 selfloop transitions, 93 changer transitions 0/393 dead transitions. [2024-05-12 13:15:41,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 393 transitions, 5319 flow [2024-05-12 13:15:41,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:15:41,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:15:41,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-05-12 13:15:41,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5044444444444445 [2024-05-12 13:15:41,820 INFO L175 Difference]: Start difference. First operand has 227 places, 338 transitions, 4023 flow. Second operand 9 states and 227 transitions. [2024-05-12 13:15:41,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 393 transitions, 5319 flow [2024-05-12 13:15:42,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 393 transitions, 5229 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-05-12 13:15:42,444 INFO L231 Difference]: Finished difference. Result has 232 places, 342 transitions, 4278 flow [2024-05-12 13:15:42,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3933, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4278, PETRI_PLACES=232, PETRI_TRANSITIONS=342} [2024-05-12 13:15:42,444 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 176 predicate places. [2024-05-12 13:15:42,444 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 342 transitions, 4278 flow [2024-05-12 13:15:42,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:42,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:15:42,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:15:42,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-05-12 13:15:42,445 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:15:42,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:15:42,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1622261888, now seen corresponding path program 7 times [2024-05-12 13:15:42,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:15:42,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312841195] [2024-05-12 13:15:42,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:15:42,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:15:42,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:15:43,329 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 13:15:43,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:15:43,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312841195] [2024-05-12 13:15:43,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312841195] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:15:43,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:15:43,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:15:43,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471919970] [2024-05-12 13:15:43,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:15:43,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:15:43,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:15:43,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:15:43,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:15:43,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:15:43,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 342 transitions, 4278 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:43,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:15:43,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:15:43,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:15:45,407 INFO L124 PetriNetUnfolderBase]: 7469/11792 cut-off events. [2024-05-12 13:15:45,407 INFO L125 PetriNetUnfolderBase]: For 612001/612024 co-relation queries the response was YES. [2024-05-12 13:15:45,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89606 conditions, 11792 events. 7469/11792 cut-off events. For 612001/612024 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 76820 event pairs, 1789 based on Foata normal form. 18/11506 useless extension candidates. Maximal degree in co-relation 89501. Up to 8779 conditions per place. [2024-05-12 13:15:45,553 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 262 selfloop transitions, 139 changer transitions 0/410 dead transitions. [2024-05-12 13:15:45,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 410 transitions, 6056 flow [2024-05-12 13:15:45,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:15:45,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:15:45,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-05-12 13:15:45,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5222222222222223 [2024-05-12 13:15:45,554 INFO L175 Difference]: Start difference. First operand has 232 places, 342 transitions, 4278 flow. Second operand 9 states and 235 transitions. [2024-05-12 13:15:45,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 410 transitions, 6056 flow [2024-05-12 13:15:46,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 410 transitions, 5788 flow, removed 67 selfloop flow, removed 6 redundant places. [2024-05-12 13:15:46,224 INFO L231 Difference]: Finished difference. Result has 236 places, 354 transitions, 4768 flow [2024-05-12 13:15:46,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4010, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4768, PETRI_PLACES=236, PETRI_TRANSITIONS=354} [2024-05-12 13:15:46,224 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 180 predicate places. [2024-05-12 13:15:46,224 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 354 transitions, 4768 flow [2024-05-12 13:15:46,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:46,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:15:46,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:15:46,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-05-12 13:15:46,225 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:15:46,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:15:46,225 INFO L85 PathProgramCache]: Analyzing trace with hash 2031435949, now seen corresponding path program 6 times [2024-05-12 13:15:46,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:15:46,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834366598] [2024-05-12 13:15:46,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:15:46,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:15:46,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:15:47,297 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 13:15:47,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:15:47,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834366598] [2024-05-12 13:15:47,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834366598] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:15:47,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:15:47,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:15:47,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980343332] [2024-05-12 13:15:47,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:15:47,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:15:47,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:15:47,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:15:47,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:15:47,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:15:47,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 354 transitions, 4768 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:47,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:15:47,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:15:47,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:15:49,729 INFO L124 PetriNetUnfolderBase]: 7511/11864 cut-off events. [2024-05-12 13:15:49,729 INFO L125 PetriNetUnfolderBase]: For 643985/644008 co-relation queries the response was YES. [2024-05-12 13:15:49,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93039 conditions, 11864 events. 7511/11864 cut-off events. For 643985/644008 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 77179 event pairs, 1897 based on Foata normal form. 23/11578 useless extension candidates. Maximal degree in co-relation 92932. Up to 9829 conditions per place. [2024-05-12 13:15:49,880 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 307 selfloop transitions, 101 changer transitions 0/417 dead transitions. [2024-05-12 13:15:49,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 417 transitions, 6168 flow [2024-05-12 13:15:49,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:15:49,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:15:49,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 251 transitions. [2024-05-12 13:15:49,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.502 [2024-05-12 13:15:49,881 INFO L175 Difference]: Start difference. First operand has 236 places, 354 transitions, 4768 flow. Second operand 10 states and 251 transitions. [2024-05-12 13:15:49,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 417 transitions, 6168 flow [2024-05-12 13:15:50,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 417 transitions, 5983 flow, removed 74 selfloop flow, removed 4 redundant places. [2024-05-12 13:15:50,851 INFO L231 Difference]: Finished difference. Result has 242 places, 358 transitions, 4961 flow [2024-05-12 13:15:50,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4587, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4961, PETRI_PLACES=242, PETRI_TRANSITIONS=358} [2024-05-12 13:15:50,852 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 186 predicate places. [2024-05-12 13:15:50,852 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 358 transitions, 4961 flow [2024-05-12 13:15:50,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:50,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:15:50,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:15:50,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-05-12 13:15:50,852 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:15:50,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:15:50,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1717736719, now seen corresponding path program 7 times [2024-05-12 13:15:50,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:15:50,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778360268] [2024-05-12 13:15:50,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:15:50,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:15:50,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:15:51,989 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 13:15:51,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:15:51,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778360268] [2024-05-12 13:15:51,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778360268] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:15:51,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:15:51,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:15:51,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067995245] [2024-05-12 13:15:51,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:15:51,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:15:51,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:15:51,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:15:51,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:15:52,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:15:52,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 358 transitions, 4961 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:52,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:15:52,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:15:52,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:15:54,269 INFO L124 PetriNetUnfolderBase]: 7601/11978 cut-off events. [2024-05-12 13:15:54,269 INFO L125 PetriNetUnfolderBase]: For 662032/662055 co-relation queries the response was YES. [2024-05-12 13:15:54,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95157 conditions, 11978 events. 7601/11978 cut-off events. For 662032/662055 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 77698 event pairs, 1909 based on Foata normal form. 23/11692 useless extension candidates. Maximal degree in co-relation 95048. Up to 9934 conditions per place. [2024-05-12 13:15:54,432 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 331 selfloop transitions, 88 changer transitions 0/428 dead transitions. [2024-05-12 13:15:54,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 428 transitions, 6837 flow [2024-05-12 13:15:54,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:15:54,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:15:54,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 256 transitions. [2024-05-12 13:15:54,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.512 [2024-05-12 13:15:54,435 INFO L175 Difference]: Start difference. First operand has 242 places, 358 transitions, 4961 flow. Second operand 10 states and 256 transitions. [2024-05-12 13:15:54,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 428 transitions, 6837 flow [2024-05-12 13:15:55,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 428 transitions, 6464 flow, removed 67 selfloop flow, removed 9 redundant places. [2024-05-12 13:15:55,388 INFO L231 Difference]: Finished difference. Result has 243 places, 366 transitions, 5098 flow [2024-05-12 13:15:55,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4588, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5098, PETRI_PLACES=243, PETRI_TRANSITIONS=366} [2024-05-12 13:15:55,388 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 187 predicate places. [2024-05-12 13:15:55,388 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 366 transitions, 5098 flow [2024-05-12 13:15:55,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:55,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:15:55,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:15:55,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-05-12 13:15:55,389 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:15:55,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:15:55,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1935961118, now seen corresponding path program 8 times [2024-05-12 13:15:55,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:15:55,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375870630] [2024-05-12 13:15:55,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:15:55,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:15:55,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:15:56,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:15:56,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:15:56,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375870630] [2024-05-12 13:15:56,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375870630] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:15:56,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:15:56,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:15:56,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805380928] [2024-05-12 13:15:56,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:15:56,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:15:56,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:15:56,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:15:56,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:15:56,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:15:56,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 366 transitions, 5098 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:56,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:15:56,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:15:56,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:15:58,602 INFO L124 PetriNetUnfolderBase]: 7685/12044 cut-off events. [2024-05-12 13:15:58,602 INFO L125 PetriNetUnfolderBase]: For 701013/701036 co-relation queries the response was YES. [2024-05-12 13:15:58,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97158 conditions, 12044 events. 7685/12044 cut-off events. For 701013/701036 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 77724 event pairs, 1891 based on Foata normal form. 18/11778 useless extension candidates. Maximal degree in co-relation 97048. Up to 9023 conditions per place. [2024-05-12 13:15:58,757 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 302 selfloop transitions, 117 changer transitions 0/428 dead transitions. [2024-05-12 13:15:58,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 428 transitions, 6809 flow [2024-05-12 13:15:58,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:15:58,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:15:58,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 239 transitions. [2024-05-12 13:15:58,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311111111111111 [2024-05-12 13:15:58,759 INFO L175 Difference]: Start difference. First operand has 243 places, 366 transitions, 5098 flow. Second operand 9 states and 239 transitions. [2024-05-12 13:15:58,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 428 transitions, 6809 flow [2024-05-12 13:15:59,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 428 transitions, 6538 flow, removed 88 selfloop flow, removed 6 redundant places. [2024-05-12 13:15:59,723 INFO L231 Difference]: Finished difference. Result has 246 places, 370 transitions, 5223 flow [2024-05-12 13:15:59,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4827, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5223, PETRI_PLACES=246, PETRI_TRANSITIONS=370} [2024-05-12 13:15:59,724 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 190 predicate places. [2024-05-12 13:15:59,724 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 370 transitions, 5223 flow [2024-05-12 13:15:59,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:59,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:15:59,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:15:59,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-05-12 13:15:59,724 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:15:59,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:15:59,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1622251968, now seen corresponding path program 2 times [2024-05-12 13:15:59,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:15:59,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203919710] [2024-05-12 13:15:59,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:15:59,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:15:59,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:16:00,884 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 13:16:00,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:16:00,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203919710] [2024-05-12 13:16:00,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203919710] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:16:00,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:16:00,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:16:00,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109244357] [2024-05-12 13:16:00,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:16:00,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:16:00,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:16:00,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:16:00,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:16:01,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:16:01,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 370 transitions, 5223 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:16:01,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:16:01,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:16:01,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:16:03,395 INFO L124 PetriNetUnfolderBase]: 7428/11978 cut-off events. [2024-05-12 13:16:03,395 INFO L125 PetriNetUnfolderBase]: For 712981/713014 co-relation queries the response was YES. [2024-05-12 13:16:03,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95690 conditions, 11978 events. 7428/11978 cut-off events. For 712981/713014 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 80478 event pairs, 1964 based on Foata normal form. 36/11683 useless extension candidates. Maximal degree in co-relation 95578. Up to 9848 conditions per place. [2024-05-12 13:16:03,549 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 332 selfloop transitions, 56 changer transitions 0/425 dead transitions. [2024-05-12 13:16:03,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 425 transitions, 6539 flow [2024-05-12 13:16:03,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:16:03,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:16:03,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-05-12 13:16:03,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5155555555555555 [2024-05-12 13:16:03,550 INFO L175 Difference]: Start difference. First operand has 246 places, 370 transitions, 5223 flow. Second operand 9 states and 232 transitions. [2024-05-12 13:16:03,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 425 transitions, 6539 flow [2024-05-12 13:16:04,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 425 transitions, 6009 flow, removed 98 selfloop flow, removed 8 redundant places. [2024-05-12 13:16:04,460 INFO L231 Difference]: Finished difference. Result has 247 places, 373 transitions, 4951 flow [2024-05-12 13:16:04,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4693, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4951, PETRI_PLACES=247, PETRI_TRANSITIONS=373} [2024-05-12 13:16:04,460 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 191 predicate places. [2024-05-12 13:16:04,460 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 373 transitions, 4951 flow [2024-05-12 13:16:04,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:16:04,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:16:04,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:16:04,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-05-12 13:16:04,461 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:16:04,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:16:04,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1610824128, now seen corresponding path program 3 times [2024-05-12 13:16:04,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:16:04,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703616945] [2024-05-12 13:16:04,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:16:04,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:16:04,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:16:05,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:16:05,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:16:05,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703616945] [2024-05-12 13:16:05,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703616945] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:16:05,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:16:05,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:16:05,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18569454] [2024-05-12 13:16:05,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:16:05,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:16:05,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:16:05,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:16:05,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:16:05,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:16:05,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 373 transitions, 4951 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:16:05,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:16:05,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:16:05,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:16:07,887 INFO L124 PetriNetUnfolderBase]: 7551/11900 cut-off events. [2024-05-12 13:16:07,887 INFO L125 PetriNetUnfolderBase]: For 727150/727179 co-relation queries the response was YES. [2024-05-12 13:16:07,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94844 conditions, 11900 events. 7551/11900 cut-off events. For 727150/727179 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 77099 event pairs, 1739 based on Foata normal form. 32/11691 useless extension candidates. Maximal degree in co-relation 94733. Up to 9489 conditions per place. [2024-05-12 13:16:08,061 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 276 selfloop transitions, 123 changer transitions 0/436 dead transitions. [2024-05-12 13:16:08,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 436 transitions, 6655 flow [2024-05-12 13:16:08,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:16:08,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:16:08,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-05-12 13:16:08,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5266666666666666 [2024-05-12 13:16:08,062 INFO L175 Difference]: Start difference. First operand has 247 places, 373 transitions, 4951 flow. Second operand 9 states and 237 transitions. [2024-05-12 13:16:08,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 436 transitions, 6655 flow [2024-05-12 13:16:08,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 436 transitions, 6421 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-05-12 13:16:08,970 INFO L231 Difference]: Finished difference. Result has 250 places, 380 transitions, 5289 flow [2024-05-12 13:16:08,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4717, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5289, PETRI_PLACES=250, PETRI_TRANSITIONS=380} [2024-05-12 13:16:08,971 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 194 predicate places. [2024-05-12 13:16:08,971 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 380 transitions, 5289 flow [2024-05-12 13:16:08,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:16:08,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:16:08,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:16:08,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-05-12 13:16:08,972 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:16:08,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:16:08,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1935951198, now seen corresponding path program 4 times [2024-05-12 13:16:08,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:16:08,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896861174] [2024-05-12 13:16:08,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:16:08,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:16:08,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:16:10,008 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 13:16:10,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:16:10,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896861174] [2024-05-12 13:16:10,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896861174] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:16:10,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:16:10,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:16:10,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679770355] [2024-05-12 13:16:10,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:16:10,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:16:10,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:16:10,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:16:10,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:16:10,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:16:10,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 380 transitions, 5289 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:16:10,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:16:10,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:16:10,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:16:12,461 INFO L124 PetriNetUnfolderBase]: 7639/12032 cut-off events. [2024-05-12 13:16:12,461 INFO L125 PetriNetUnfolderBase]: For 756640/756669 co-relation queries the response was YES. [2024-05-12 13:16:12,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97453 conditions, 12032 events. 7639/12032 cut-off events. For 756640/756669 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 78047 event pairs, 1841 based on Foata normal form. 32/11820 useless extension candidates. Maximal degree in co-relation 97340. Up to 10041 conditions per place. [2024-05-12 13:16:12,633 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 324 selfloop transitions, 85 changer transitions 0/446 dead transitions. [2024-05-12 13:16:12,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 446 transitions, 6952 flow [2024-05-12 13:16:12,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:16:12,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:16:12,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-05-12 13:16:12,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-05-12 13:16:12,634 INFO L175 Difference]: Start difference. First operand has 250 places, 380 transitions, 5289 flow. Second operand 9 states and 234 transitions. [2024-05-12 13:16:12,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 446 transitions, 6952 flow [2024-05-12 13:16:13,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 446 transitions, 6607 flow, removed 97 selfloop flow, removed 5 redundant places. [2024-05-12 13:16:13,814 INFO L231 Difference]: Finished difference. Result has 256 places, 391 transitions, 5425 flow [2024-05-12 13:16:13,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4984, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5425, PETRI_PLACES=256, PETRI_TRANSITIONS=391} [2024-05-12 13:16:13,814 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 200 predicate places. [2024-05-12 13:16:13,814 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 391 transitions, 5425 flow [2024-05-12 13:16:13,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:16:13,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:16:13,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:16:13,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-05-12 13:16:13,815 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:16:13,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:16:13,815 INFO L85 PathProgramCache]: Analyzing trace with hash 670272105, now seen corresponding path program 8 times [2024-05-12 13:16:13,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:16:13,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019240764] [2024-05-12 13:16:13,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:16:13,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:16:13,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:16:14,892 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 13:16:14,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:16:14,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019240764] [2024-05-12 13:16:14,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019240764] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:16:14,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:16:14,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:16:14,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512504367] [2024-05-12 13:16:14,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:16:14,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:16:14,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:16:14,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:16:14,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:16:14,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:16:14,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 391 transitions, 5425 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:16:14,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:16:14,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:16:14,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:16:17,320 INFO L124 PetriNetUnfolderBase]: 7944/12547 cut-off events. [2024-05-12 13:16:17,320 INFO L125 PetriNetUnfolderBase]: For 758347/758370 co-relation queries the response was YES. [2024-05-12 13:16:17,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100529 conditions, 12547 events. 7944/12547 cut-off events. For 758347/758370 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 82218 event pairs, 1945 based on Foata normal form. 23/12241 useless extension candidates. Maximal degree in co-relation 100412. Up to 10506 conditions per place. [2024-05-12 13:16:17,495 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 356 selfloop transitions, 79 changer transitions 0/444 dead transitions. [2024-05-12 13:16:17,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 444 transitions, 6929 flow [2024-05-12 13:16:17,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:16:17,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:16:17,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-05-12 13:16:17,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5088888888888888 [2024-05-12 13:16:17,496 INFO L175 Difference]: Start difference. First operand has 256 places, 391 transitions, 5425 flow. Second operand 9 states and 229 transitions. [2024-05-12 13:16:17,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 444 transitions, 6929 flow [2024-05-12 13:16:18,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 444 transitions, 6476 flow, removed 149 selfloop flow, removed 6 redundant places. [2024-05-12 13:16:18,970 INFO L231 Difference]: Finished difference. Result has 259 places, 391 transitions, 5139 flow [2024-05-12 13:16:18,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4972, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5139, PETRI_PLACES=259, PETRI_TRANSITIONS=391} [2024-05-12 13:16:18,971 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 203 predicate places. [2024-05-12 13:16:18,971 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 391 transitions, 5139 flow [2024-05-12 13:16:18,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:16:18,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:16:18,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:16:18,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-05-12 13:16:18,971 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:16:18,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:16:18,972 INFO L85 PathProgramCache]: Analyzing trace with hash 2042478180, now seen corresponding path program 5 times [2024-05-12 13:16:18,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:16:18,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686751895] [2024-05-12 13:16:18,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:16:18,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:16:18,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:16:20,038 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 13:16:20,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:16:20,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686751895] [2024-05-12 13:16:20,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686751895] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:16:20,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:16:20,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:16:20,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687560444] [2024-05-12 13:16:20,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:16:20,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:16:20,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:16:20,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:16:20,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:16:20,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:16:20,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 391 transitions, 5139 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:16:20,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:16:20,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:16:20,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:16:22,829 INFO L124 PetriNetUnfolderBase]: 7640/12284 cut-off events. [2024-05-12 13:16:22,829 INFO L125 PetriNetUnfolderBase]: For 742256/742289 co-relation queries the response was YES. [2024-05-12 13:16:22,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95861 conditions, 12284 events. 7640/12284 cut-off events. For 742256/742289 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 82441 event pairs, 1984 based on Foata normal form. 36/11987 useless extension candidates. Maximal degree in co-relation 95745. Up to 9984 conditions per place. [2024-05-12 13:16:22,993 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 346 selfloop transitions, 75 changer transitions 0/458 dead transitions. [2024-05-12 13:16:22,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 458 transitions, 6589 flow [2024-05-12 13:16:22,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:16:22,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:16:22,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 258 transitions. [2024-05-12 13:16:22,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516 [2024-05-12 13:16:22,994 INFO L175 Difference]: Start difference. First operand has 259 places, 391 transitions, 5139 flow. Second operand 10 states and 258 transitions. [2024-05-12 13:16:22,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 458 transitions, 6589 flow [2024-05-12 13:16:24,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 458 transitions, 6259 flow, removed 92 selfloop flow, removed 7 redundant places. [2024-05-12 13:16:24,249 INFO L231 Difference]: Finished difference. Result has 263 places, 398 transitions, 5143 flow [2024-05-12 13:16:24,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4895, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5143, PETRI_PLACES=263, PETRI_TRANSITIONS=398} [2024-05-12 13:16:24,249 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 207 predicate places. [2024-05-12 13:16:24,249 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 398 transitions, 5143 flow [2024-05-12 13:16:24,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:16:24,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:16:24,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:16:24,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-05-12 13:16:24,250 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:16:24,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:16:24,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1936228028, now seen corresponding path program 9 times [2024-05-12 13:16:24,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:16:24,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503301688] [2024-05-12 13:16:24,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:16:24,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:16:24,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:16:25,148 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 13:16:25,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:16:25,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503301688] [2024-05-12 13:16:25,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503301688] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:16:25,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:16:25,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:16:25,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184456876] [2024-05-12 13:16:25,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:16:25,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:16:25,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:16:25,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:16:25,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:16:25,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:16:25,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 398 transitions, 5143 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:16:25,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:16:25,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:16:25,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:16:27,962 INFO L124 PetriNetUnfolderBase]: 8044/12618 cut-off events. [2024-05-12 13:16:27,963 INFO L125 PetriNetUnfolderBase]: For 765826/765849 co-relation queries the response was YES. [2024-05-12 13:16:28,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100188 conditions, 12618 events. 8044/12618 cut-off events. For 765826/765849 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 82121 event pairs, 1933 based on Foata normal form. 18/12336 useless extension candidates. Maximal degree in co-relation 100070. Up to 9488 conditions per place. [2024-05-12 13:16:28,138 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 332 selfloop transitions, 119 changer transitions 0/460 dead transitions. [2024-05-12 13:16:28,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 460 transitions, 7055 flow [2024-05-12 13:16:28,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:16:28,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:16:28,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-05-12 13:16:28,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5266666666666666 [2024-05-12 13:16:28,140 INFO L175 Difference]: Start difference. First operand has 263 places, 398 transitions, 5143 flow. Second operand 9 states and 237 transitions. [2024-05-12 13:16:28,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 460 transitions, 7055 flow [2024-05-12 13:16:29,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 460 transitions, 6907 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-05-12 13:16:29,518 INFO L231 Difference]: Finished difference. Result has 265 places, 402 transitions, 5369 flow [2024-05-12 13:16:29,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4995, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5369, PETRI_PLACES=265, PETRI_TRANSITIONS=402} [2024-05-12 13:16:29,519 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 209 predicate places. [2024-05-12 13:16:29,519 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 402 transitions, 5369 flow [2024-05-12 13:16:29,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:16:29,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:16:29,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:16:29,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-05-12 13:16:29,520 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:16:29,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:16:29,520 INFO L85 PathProgramCache]: Analyzing trace with hash 2042477839, now seen corresponding path program 9 times [2024-05-12 13:16:29,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:16:29,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903797883] [2024-05-12 13:16:29,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:16:29,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:16:29,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:16:30,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:16:30,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:16:30,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903797883] [2024-05-12 13:16:30,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903797883] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:16:30,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:16:30,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:16:30,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402660320] [2024-05-12 13:16:30,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:16:30,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:16:30,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:16:30,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:16:30,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:16:30,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:16:30,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 402 transitions, 5369 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:16:30,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:16:30,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:16:30,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:16:33,357 INFO L124 PetriNetUnfolderBase]: 8063/12297 cut-off events. [2024-05-12 13:16:33,357 INFO L125 PetriNetUnfolderBase]: For 777440/777463 co-relation queries the response was YES. [2024-05-12 13:16:33,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101242 conditions, 12297 events. 8063/12297 cut-off events. For 777440/777463 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 78007 event pairs, 1929 based on Foata normal form. 23/12101 useless extension candidates. Maximal degree in co-relation 101123. Up to 10279 conditions per place. [2024-05-12 13:16:33,531 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 321 selfloop transitions, 143 changer transitions 0/473 dead transitions. [2024-05-12 13:16:33,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 473 transitions, 6973 flow [2024-05-12 13:16:33,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 13:16:33,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 13:16:33,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 277 transitions. [2024-05-12 13:16:33,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5036363636363637 [2024-05-12 13:16:33,533 INFO L175 Difference]: Start difference. First operand has 265 places, 402 transitions, 5369 flow. Second operand 11 states and 277 transitions. [2024-05-12 13:16:33,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 473 transitions, 6973 flow [2024-05-12 13:16:35,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 473 transitions, 6650 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-05-12 13:16:35,011 INFO L231 Difference]: Finished difference. Result has 270 places, 406 transitions, 5533 flow [2024-05-12 13:16:35,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5046, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5533, PETRI_PLACES=270, PETRI_TRANSITIONS=406} [2024-05-12 13:16:35,012 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 214 predicate places. [2024-05-12 13:16:35,012 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 406 transitions, 5533 flow [2024-05-12 13:16:35,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:16:35,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:16:35,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:16:35,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-05-12 13:16:35,012 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:16:35,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:16:35,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1717467670, now seen corresponding path program 10 times [2024-05-12 13:16:35,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:16:35,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130900222] [2024-05-12 13:16:35,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:16:35,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:16:35,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:16:36,158 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 13:16:36,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:16:36,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130900222] [2024-05-12 13:16:36,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130900222] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:16:36,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:16:36,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:16:36,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757083401] [2024-05-12 13:16:36,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:16:36,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:16:36,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:16:36,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:16:36,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:16:36,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:16:36,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 406 transitions, 5533 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:16:36,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:16:36,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:16:36,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:16:38,967 INFO L124 PetriNetUnfolderBase]: 8051/12298 cut-off events. [2024-05-12 13:16:38,967 INFO L125 PetriNetUnfolderBase]: For 788036/788059 co-relation queries the response was YES. [2024-05-12 13:16:39,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101393 conditions, 12298 events. 8051/12298 cut-off events. For 788036/788059 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 78089 event pairs, 1931 based on Foata normal form. 18/12098 useless extension candidates. Maximal degree in co-relation 101273. Up to 9508 conditions per place. [2024-05-12 13:16:39,127 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 335 selfloop transitions, 119 changer transitions 0/463 dead transitions. [2024-05-12 13:16:39,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 463 transitions, 7131 flow [2024-05-12 13:16:39,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:16:39,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:16:39,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-05-12 13:16:39,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5266666666666666 [2024-05-12 13:16:39,128 INFO L175 Difference]: Start difference. First operand has 270 places, 406 transitions, 5533 flow. Second operand 9 states and 237 transitions. [2024-05-12 13:16:39,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 463 transitions, 7131 flow [2024-05-12 13:16:40,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 463 transitions, 6645 flow, removed 131 selfloop flow, removed 8 redundant places. [2024-05-12 13:16:40,775 INFO L231 Difference]: Finished difference. Result has 271 places, 406 transitions, 5302 flow [2024-05-12 13:16:40,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5055, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5302, PETRI_PLACES=271, PETRI_TRANSITIONS=406} [2024-05-12 13:16:40,775 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 215 predicate places. [2024-05-12 13:16:40,776 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 406 transitions, 5302 flow [2024-05-12 13:16:40,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:16:40,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:16:40,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:16:40,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-05-12 13:16:40,776 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:16:40,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:16:40,777 INFO L85 PathProgramCache]: Analyzing trace with hash -709918759, now seen corresponding path program 2 times [2024-05-12 13:16:40,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:16:40,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099657604] [2024-05-12 13:16:40,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:16:40,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:16:40,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:16:41,539 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 13:16:41,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:16:41,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099657604] [2024-05-12 13:16:41,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099657604] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:16:41,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:16:41,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:16:41,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956346360] [2024-05-12 13:16:41,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:16:41,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:16:41,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:16:41,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:16:41,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:16:41,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:16:41,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 406 transitions, 5302 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:16:41,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:16:41,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:16:41,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:16:44,467 INFO L124 PetriNetUnfolderBase]: 7714/11930 cut-off events. [2024-05-12 13:16:44,468 INFO L125 PetriNetUnfolderBase]: For 749243/749280 co-relation queries the response was YES. [2024-05-12 13:16:44,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95709 conditions, 11930 events. 7714/11930 cut-off events. For 749243/749280 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 77227 event pairs, 2184 based on Foata normal form. 35/11769 useless extension candidates. Maximal degree in co-relation 95588. Up to 10598 conditions per place. [2024-05-12 13:16:44,604 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 357 selfloop transitions, 30 changer transitions 0/425 dead transitions. [2024-05-12 13:16:44,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 425 transitions, 6130 flow [2024-05-12 13:16:44,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:16:44,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:16:44,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-05-12 13:16:44,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-05-12 13:16:44,605 INFO L175 Difference]: Start difference. First operand has 271 places, 406 transitions, 5302 flow. Second operand 6 states and 144 transitions. [2024-05-12 13:16:44,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 425 transitions, 6130 flow [2024-05-12 13:16:45,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 425 transitions, 5855 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-05-12 13:16:45,580 INFO L231 Difference]: Finished difference. Result has 270 places, 406 transitions, 5099 flow [2024-05-12 13:16:45,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5029, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5099, PETRI_PLACES=270, PETRI_TRANSITIONS=406} [2024-05-12 13:16:45,582 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 214 predicate places. [2024-05-12 13:16:45,582 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 406 transitions, 5099 flow [2024-05-12 13:16:45,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:16:45,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:16:45,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:16:45,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-05-12 13:16:45,582 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:16:45,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:16:45,583 INFO L85 PathProgramCache]: Analyzing trace with hash -717296852, now seen corresponding path program 1 times [2024-05-12 13:16:45,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:16:45,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939406006] [2024-05-12 13:16:45,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:16:45,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:16:45,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:16:46,416 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 13:16:46,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:16:46,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939406006] [2024-05-12 13:16:46,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939406006] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:16:46,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:16:46,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:16:46,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272204895] [2024-05-12 13:16:46,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:16:46,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:16:46,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:16:46,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:16:46,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:16:46,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:16:46,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 406 transitions, 5099 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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 13:16:46,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:16:46,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:16:46,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:16:48,895 INFO L124 PetriNetUnfolderBase]: 7022/11325 cut-off events. [2024-05-12 13:16:48,895 INFO L125 PetriNetUnfolderBase]: For 660526/660536 co-relation queries the response was YES. [2024-05-12 13:16:48,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86828 conditions, 11325 events. 7022/11325 cut-off events. For 660526/660536 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 76900 event pairs, 1818 based on Foata normal form. 12/11093 useless extension candidates. Maximal degree in co-relation 86706. Up to 9589 conditions per place. [2024-05-12 13:16:49,029 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 372 selfloop transitions, 21 changer transitions 0/432 dead transitions. [2024-05-12 13:16:49,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 432 transitions, 6146 flow [2024-05-12 13:16:49,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:16:49,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:16:49,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-05-12 13:16:49,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5133333333333333 [2024-05-12 13:16:49,030 INFO L175 Difference]: Start difference. First operand has 270 places, 406 transitions, 5099 flow. Second operand 6 states and 154 transitions. [2024-05-12 13:16:49,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 432 transitions, 6146 flow [2024-05-12 13:16:50,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 432 transitions, 6066 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-05-12 13:16:50,010 INFO L231 Difference]: Finished difference. Result has 271 places, 409 transitions, 5128 flow [2024-05-12 13:16:50,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5019, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5128, PETRI_PLACES=271, PETRI_TRANSITIONS=409} [2024-05-12 13:16:50,010 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 215 predicate places. [2024-05-12 13:16:50,010 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 409 transitions, 5128 flow [2024-05-12 13:16:50,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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 13:16:50,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:16:50,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:16:50,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-05-12 13:16:50,011 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:16:50,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:16:50,011 INFO L85 PathProgramCache]: Analyzing trace with hash -709910792, now seen corresponding path program 2 times [2024-05-12 13:16:50,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:16:50,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381854343] [2024-05-12 13:16:50,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:16:50,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:16:50,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:16:50,749 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 13:16:50,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:16:50,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381854343] [2024-05-12 13:16:50,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381854343] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:16:50,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:16:50,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:16:50,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716958069] [2024-05-12 13:16:50,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:16:50,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:16:50,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:16:50,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:16:50,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:16:50,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:16:50,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 409 transitions, 5128 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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 13:16:50,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:16:50,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:16:50,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:16:53,357 INFO L124 PetriNetUnfolderBase]: 6986/11098 cut-off events. [2024-05-12 13:16:53,358 INFO L125 PetriNetUnfolderBase]: For 671522/671534 co-relation queries the response was YES. [2024-05-12 13:16:53,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86576 conditions, 11098 events. 6986/11098 cut-off events. For 671522/671534 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 73705 event pairs, 1917 based on Foata normal form. 13/10930 useless extension candidates. Maximal degree in co-relation 86453. Up to 9609 conditions per place. [2024-05-12 13:16:53,488 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 374 selfloop transitions, 13 changer transitions 0/426 dead transitions. [2024-05-12 13:16:53,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 426 transitions, 5958 flow [2024-05-12 13:16:53,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:16:53,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:16:53,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-05-12 13:16:53,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-05-12 13:16:53,489 INFO L175 Difference]: Start difference. First operand has 271 places, 409 transitions, 5128 flow. Second operand 6 states and 145 transitions. [2024-05-12 13:16:53,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 426 transitions, 5958 flow [2024-05-12 13:16:54,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 426 transitions, 5925 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-05-12 13:16:54,460 INFO L231 Difference]: Finished difference. Result has 274 places, 409 transitions, 5127 flow [2024-05-12 13:16:54,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5095, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5127, PETRI_PLACES=274, PETRI_TRANSITIONS=409} [2024-05-12 13:16:54,461 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 218 predicate places. [2024-05-12 13:16:54,461 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 409 transitions, 5127 flow [2024-05-12 13:16:54,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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 13:16:54,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:16:54,461 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 13:16:54,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-05-12 13:16:54,462 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:16:54,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:16:54,462 INFO L85 PathProgramCache]: Analyzing trace with hash 775325650, now seen corresponding path program 1 times [2024-05-12 13:16:54,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:16:54,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970587179] [2024-05-12 13:16:54,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:16:54,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:16:54,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:16:55,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:16:55,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:16:55,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970587179] [2024-05-12 13:16:55,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970587179] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:16:55,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:16:55,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:16:55,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662021566] [2024-05-12 13:16:55,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:16:55,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:16:55,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:16:55,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:16:55,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:16:55,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:16:55,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 409 transitions, 5127 flow. Second operand has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:16:55,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:16:55,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:16:55,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:16:58,724 INFO L124 PetriNetUnfolderBase]: 8054/12345 cut-off events. [2024-05-12 13:16:58,724 INFO L125 PetriNetUnfolderBase]: For 803181/803181 co-relation queries the response was YES. [2024-05-12 13:16:58,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98814 conditions, 12345 events. 8054/12345 cut-off events. For 803181/803181 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 78895 event pairs, 2165 based on Foata normal form. 3/12139 useless extension candidates. Maximal degree in co-relation 98690. Up to 11162 conditions per place. [2024-05-12 13:16:58,899 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 427 selfloop transitions, 50 changer transitions 0/486 dead transitions. [2024-05-12 13:16:58,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 486 transitions, 7121 flow [2024-05-12 13:16:58,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:16:58,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:16:58,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 255 transitions. [2024-05-12 13:16:58,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-05-12 13:16:58,900 INFO L175 Difference]: Start difference. First operand has 274 places, 409 transitions, 5127 flow. Second operand 10 states and 255 transitions. [2024-05-12 13:16:58,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 486 transitions, 7121 flow [2024-05-12 13:17:00,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 486 transitions, 7065 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-05-12 13:17:00,308 INFO L231 Difference]: Finished difference. Result has 280 places, 421 transitions, 5583 flow [2024-05-12 13:17:00,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5071, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5583, PETRI_PLACES=280, PETRI_TRANSITIONS=421} [2024-05-12 13:17:00,308 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 224 predicate places. [2024-05-12 13:17:00,308 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 421 transitions, 5583 flow [2024-05-12 13:17:00,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:17:00,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:17:00,309 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 13:17:00,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-05-12 13:17:00,309 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:17:00,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:17:00,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1980948314, now seen corresponding path program 1 times [2024-05-12 13:17:00,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:17:00,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655583876] [2024-05-12 13:17:00,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:17:00,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:17:00,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:17:01,421 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 13:17:01,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:17:01,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655583876] [2024-05-12 13:17:01,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655583876] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:17:01,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:17:01,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:17:01,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359339903] [2024-05-12 13:17:01,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:17:01,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:17:01,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:17:01,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:17:01,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:17:01,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:17:01,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 421 transitions, 5583 flow. Second operand has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:17:01,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:17:01,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:17:01,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:17:04,748 INFO L124 PetriNetUnfolderBase]: 8121/12481 cut-off events. [2024-05-12 13:17:04,748 INFO L125 PetriNetUnfolderBase]: For 856877/856877 co-relation queries the response was YES. [2024-05-12 13:17:04,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102577 conditions, 12481 events. 8121/12481 cut-off events. For 856877/856877 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 80265 event pairs, 2053 based on Foata normal form. 3/12267 useless extension candidates. Maximal degree in co-relation 102451. Up to 11197 conditions per place. [2024-05-12 13:17:04,908 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 436 selfloop transitions, 67 changer transitions 0/512 dead transitions. [2024-05-12 13:17:04,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 512 transitions, 7845 flow [2024-05-12 13:17:04,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:17:04,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:17:04,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 256 transitions. [2024-05-12 13:17:04,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.512 [2024-05-12 13:17:04,909 INFO L175 Difference]: Start difference. First operand has 280 places, 421 transitions, 5583 flow. Second operand 10 states and 256 transitions. [2024-05-12 13:17:04,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 512 transitions, 7845 flow [2024-05-12 13:17:06,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 512 transitions, 7550 flow, removed 127 selfloop flow, removed 5 redundant places. [2024-05-12 13:17:06,333 INFO L231 Difference]: Finished difference. Result has 288 places, 443 transitions, 6078 flow [2024-05-12 13:17:06,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5288, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6078, PETRI_PLACES=288, PETRI_TRANSITIONS=443} [2024-05-12 13:17:06,333 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 232 predicate places. [2024-05-12 13:17:06,333 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 443 transitions, 6078 flow [2024-05-12 13:17:06,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:17:06,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:17:06,334 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 13:17:06,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-05-12 13:17:06,334 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:17:06,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:17:06,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1836164054, now seen corresponding path program 2 times [2024-05-12 13:17:06,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:17:06,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532082404] [2024-05-12 13:17:06,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:17:06,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:17:06,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:17:07,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:17:07,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:17:07,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532082404] [2024-05-12 13:17:07,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532082404] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:17:07,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:17:07,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:17:07,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300564210] [2024-05-12 13:17:07,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:17:07,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:17:07,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:17:07,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:17:07,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:17:07,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:17:07,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 443 transitions, 6078 flow. Second operand has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:17:07,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:17:07,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:17:07,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:17:10,715 INFO L124 PetriNetUnfolderBase]: 8205/12602 cut-off events. [2024-05-12 13:17:10,715 INFO L125 PetriNetUnfolderBase]: For 917301/917301 co-relation queries the response was YES. [2024-05-12 13:17:10,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106303 conditions, 12602 events. 8205/12602 cut-off events. For 917301/917301 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 81037 event pairs, 2057 based on Foata normal form. 6/12384 useless extension candidates. Maximal degree in co-relation 106172. Up to 10918 conditions per place. [2024-05-12 13:17:10,911 INFO L140 encePairwiseOnDemand]: 34/50 looper letters, 438 selfloop transitions, 67 changer transitions 0/514 dead transitions. [2024-05-12 13:17:10,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 514 transitions, 7906 flow [2024-05-12 13:17:10,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:17:10,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:17:10,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 257 transitions. [2024-05-12 13:17:10,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.514 [2024-05-12 13:17:10,913 INFO L175 Difference]: Start difference. First operand has 288 places, 443 transitions, 6078 flow. Second operand 10 states and 257 transitions. [2024-05-12 13:17:10,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 514 transitions, 7906 flow [2024-05-12 13:17:12,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 514 transitions, 7509 flow, removed 174 selfloop flow, removed 4 redundant places. [2024-05-12 13:17:12,514 INFO L231 Difference]: Finished difference. Result has 294 places, 448 transitions, 6031 flow [2024-05-12 13:17:12,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5691, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6031, PETRI_PLACES=294, PETRI_TRANSITIONS=448} [2024-05-12 13:17:12,515 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 238 predicate places. [2024-05-12 13:17:12,515 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 448 transitions, 6031 flow [2024-05-12 13:17:12,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:17:12,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:17:12,515 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 13:17:12,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-05-12 13:17:12,515 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:17:12,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:17:12,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1835933414, now seen corresponding path program 3 times [2024-05-12 13:17:12,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:17:12,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942395475] [2024-05-12 13:17:12,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:17:12,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:17:12,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:17:13,687 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 13:17:13,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:17:13,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942395475] [2024-05-12 13:17:13,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942395475] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:17:13,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:17:13,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:17:13,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501121735] [2024-05-12 13:17:13,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:17:13,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:17:13,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:17:13,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:17:13,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:17:13,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:17:13,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 448 transitions, 6031 flow. Second operand has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:17:13,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:17:13,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:17:13,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:17:16,761 INFO L124 PetriNetUnfolderBase]: 8289/12709 cut-off events. [2024-05-12 13:17:16,761 INFO L125 PetriNetUnfolderBase]: For 961596/961596 co-relation queries the response was YES. [2024-05-12 13:17:16,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109138 conditions, 12709 events. 8289/12709 cut-off events. For 961596/961596 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 81577 event pairs, 2046 based on Foata normal form. 6/12497 useless extension candidates. Maximal degree in co-relation 109005. Up to 11034 conditions per place. [2024-05-12 13:17:17,111 INFO L140 encePairwiseOnDemand]: 34/50 looper letters, 435 selfloop transitions, 75 changer transitions 0/519 dead transitions. [2024-05-12 13:17:17,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 519 transitions, 7759 flow [2024-05-12 13:17:17,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:17:17,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:17:17,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 256 transitions. [2024-05-12 13:17:17,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.512 [2024-05-12 13:17:17,113 INFO L175 Difference]: Start difference. First operand has 294 places, 448 transitions, 6031 flow. Second operand 10 states and 256 transitions. [2024-05-12 13:17:17,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 519 transitions, 7759 flow