./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix011.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/protection/mix011.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/mix011.opt.i ./goblint.2024-05-07_14-17-48.files/protection/mix011.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 13:06:06,310 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 13:06:06,403 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 13:06:06,413 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 13:06:06,414 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 13:06:06,446 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 13:06:06,447 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 13:06:06,447 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 13:06:06,448 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 13:06:06,451 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 13:06:06,452 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 13:06:06,452 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 13:06:06,453 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 13:06:06,454 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 13:06:06,455 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 13:06:06,455 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 13:06:06,455 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 13:06:06,455 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 13:06:06,456 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 13:06:06,456 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 13:06:06,457 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 13:06:06,458 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 13:06:06,458 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 13:06:06,458 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 13:06:06,458 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 13:06:06,459 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 13:06:06,459 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 13:06:06,459 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 13:06:06,460 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 13:06:06,460 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 13:06:06,461 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 13:06:06,461 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 13:06:06,461 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 13:06:06,462 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 13:06:06,462 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 13:06:06,462 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 13:06:06,462 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 13:06:06,463 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 13:06:06,463 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 13:06:06,463 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 13:06:06,463 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 13:06:06,463 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 13:06:06,464 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 13:06:06,464 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 13:06:06,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 13:06:06,759 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 13:06:06,762 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 13:06:06,763 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 13:06:06,764 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 13:06:06,765 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix011.opt.i [2024-05-12 13:06:07,896 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 13:06:08,155 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 13:06:08,156 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix011.opt.i [2024-05-12 13:06:08,183 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0266c93e0/4dd9b48243ed45e486d8fdb084aa539b/FLAG86033ce4c [2024-05-12 13:06:08,202 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0266c93e0/4dd9b48243ed45e486d8fdb084aa539b [2024-05-12 13:06:08,205 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 13:06:08,205 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 13:06:08,207 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/protection/mix011.opt.yml/witness.yml [2024-05-12 13:06:08,386 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 13:06:08,389 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 13:06:08,390 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 13:06:08,391 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 13:06:08,396 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 13:06:08,397 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 01:06:08" (1/2) ... [2024-05-12 13:06:08,398 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6840adb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:06:08, skipping insertion in model container [2024-05-12 13:06:08,399 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 01:06:08" (1/2) ... [2024-05-12 13:06:08,400 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@15e63ef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:06:08, skipping insertion in model container [2024-05-12 13:06:08,400 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 01:06:08" (2/2) ... [2024-05-12 13:06:08,401 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6840adb6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:06:08, skipping insertion in model container [2024-05-12 13:06:08,401 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 01:06:08" (2/2) ... [2024-05-12 13:06:08,401 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 13:06:08,513 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 13:06:08,515 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] ((((((((((((((((((((! multithreaded || z$read_delayed_var == 0) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) [2024-05-12 13:06:08,515 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] ((((((((((((((((((((! multithreaded || z$read_delayed_var == 0) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) [2024-05-12 13:06:08,516 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] ((((((((((((((((((((! multithreaded || z$read_delayed_var == 0) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) [2024-05-12 13:06:08,516 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 13:06:08,516 INFO L106 edCorrectnessWitness]: ghost_update [L852-L852] multithreaded = 1; [2024-05-12 13:06:08,566 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 13:06:08,810 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/mix011.opt.i[944,957] [2024-05-12 13:06:08,981 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 13:06:08,994 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-05-12 13:06:09,031 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/mix011.opt.i[944,957] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 13:06:09,158 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 13:06:09,196 INFO L206 MainTranslator]: Completed translation [2024-05-12 13:06:09,197 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:06:09 WrapperNode [2024-05-12 13:06:09,197 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 13:06:09,198 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 13:06:09,198 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 13:06:09,199 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 13:06:09,204 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:06:09" (1/1) ... [2024-05-12 13:06:09,222 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:06:09" (1/1) ... [2024-05-12 13:06:09,259 INFO L138 Inliner]: procedures = 176, calls = 60, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 156 [2024-05-12 13:06:09,259 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 13:06:09,260 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 13:06:09,260 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 13:06:09,260 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 13:06:09,271 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:06:09" (1/1) ... [2024-05-12 13:06:09,271 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:06:09" (1/1) ... [2024-05-12 13:06:09,278 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:06:09" (1/1) ... [2024-05-12 13:06:09,303 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 13:06:09,311 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:06:09" (1/1) ... [2024-05-12 13:06:09,312 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:06:09" (1/1) ... [2024-05-12 13:06:09,335 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:06:09" (1/1) ... [2024-05-12 13:06:09,343 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:06:09" (1/1) ... [2024-05-12 13:06:09,345 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:06:09" (1/1) ... [2024-05-12 13:06:09,352 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:06:09" (1/1) ... [2024-05-12 13:06:09,356 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 13:06:09,360 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 13:06:09,360 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 13:06:09,360 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 13:06:09,361 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:06:09" (1/1) ... [2024-05-12 13:06:09,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 13:06:09,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 13:06:09,396 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 13:06:09,408 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 13:06:09,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 13:06:09,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 13:06:09,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 13:06:09,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-05-12 13:06:09,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 13:06:09,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 13:06:09,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 13:06:09,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 13:06:09,440 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-05-12 13:06:09,440 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-05-12 13:06:09,440 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-05-12 13:06:09,440 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-05-12 13:06:09,441 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-05-12 13:06:09,441 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-05-12 13:06:09,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 13:06:09,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 13:06:09,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 13:06:09,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-05-12 13:06:09,444 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 13:06:09,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 13:06:09,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 13:06:09,446 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 13:06:09,619 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 13:06:09,622 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 13:06:10,054 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 13:06:10,054 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 13:06:10,257 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 13:06:10,257 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-05-12 13:06:10,259 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 01:06:10 BoogieIcfgContainer [2024-05-12 13:06:10,259 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 13:06:10,262 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 13:06:10,262 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 13:06:10,265 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 13:06:10,265 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 01:06:08" (1/4) ... [2024-05-12 13:06:10,266 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43d6e2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 01:06:10, skipping insertion in model container [2024-05-12 13:06:10,267 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 01:06:08" (2/4) ... [2024-05-12 13:06:10,267 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43d6e2b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 01:06:10, skipping insertion in model container [2024-05-12 13:06:10,267 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:06:09" (3/4) ... [2024-05-12 13:06:10,268 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43d6e2b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 01:06:10, skipping insertion in model container [2024-05-12 13:06:10,268 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 01:06:10" (4/4) ... [2024-05-12 13:06:10,269 INFO L112 eAbstractionObserver]: Analyzing ICFG mix011.opt.i [2024-05-12 13:06:10,286 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 13:06:10,286 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-05-12 13:06:10,287 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 13:06:10,378 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-05-12 13:06:10,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 50 transitions, 112 flow [2024-05-12 13:06:10,458 INFO L124 PetriNetUnfolderBase]: 1/47 cut-off events. [2024-05-12 13:06:10,458 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 13:06:10,462 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 79 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 13:06:10,462 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 50 transitions, 112 flow [2024-05-12 13:06:10,467 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 47 transitions, 103 flow [2024-05-12 13:06:10,481 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 13:06:10,490 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;@359c5c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 13:06:10,490 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-05-12 13:06:10,494 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 13:06:10,495 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-05-12 13:06:10,495 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 13:06:10,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:10,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 13:06:10,497 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:10,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:10,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1275037849, now seen corresponding path program 1 times [2024-05-12 13:06:10,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:10,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992705640] [2024-05-12 13:06:10,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:10,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:10,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:12,214 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 13:06:12,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:12,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992705640] [2024-05-12 13:06:12,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992705640] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:12,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:12,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 13:06:12,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063086000] [2024-05-12 13:06:12,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:12,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 13:06:12,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:12,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 13:06:12,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 13:06:12,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-05-12 13:06:12,361 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 13:06:12,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:12,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-05-12 13:06:12,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:13,275 INFO L124 PetriNetUnfolderBase]: 3657/6136 cut-off events. [2024-05-12 13:06:13,276 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-05-12 13:06:13,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11480 conditions, 6136 events. 3657/6136 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 41352 event pairs, 2984 based on Foata normal form. 181/5824 useless extension candidates. Maximal degree in co-relation 11465. Up to 5253 conditions per place. [2024-05-12 13:06:13,327 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 43 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2024-05-12 13:06:13,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 61 transitions, 233 flow [2024-05-12 13:06:13,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 13:06:13,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 13:06:13,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2024-05-12 13:06:13,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6733333333333333 [2024-05-12 13:06:13,344 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 103 flow. Second operand 3 states and 101 transitions. [2024-05-12 13:06:13,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 61 transitions, 233 flow [2024-05-12 13:06:13,347 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 13:06:13,350 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 135 flow [2024-05-12 13:06:13,351 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 13:06:13,354 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 0 predicate places. [2024-05-12 13:06:13,355 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 135 flow [2024-05-12 13:06:13,355 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 13:06:13,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:13,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:13,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 13:06:13,356 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:13,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:13,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1245677434, now seen corresponding path program 1 times [2024-05-12 13:06:13,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:13,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868251808] [2024-05-12 13:06:13,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:13,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:14,637 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 13:06:14,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:14,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868251808] [2024-05-12 13:06:14,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868251808] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:14,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:14,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 13:06:14,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628112054] [2024-05-12 13:06:14,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:14,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 13:06:14,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:14,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 13:06:14,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 13:06:14,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:06:14,703 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 13:06:14,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:14,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:06:14,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:15,536 INFO L124 PetriNetUnfolderBase]: 4173/6263 cut-off events. [2024-05-12 13:06:15,536 INFO L125 PetriNetUnfolderBase]: For 889/889 co-relation queries the response was YES. [2024-05-12 13:06:15,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13705 conditions, 6263 events. 4173/6263 cut-off events. For 889/889 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 37395 event pairs, 2259 based on Foata normal form. 3/5995 useless extension candidates. Maximal degree in co-relation 13690. Up to 5953 conditions per place. [2024-05-12 13:06:15,585 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 55 selfloop transitions, 9 changer transitions 0/76 dead transitions. [2024-05-12 13:06:15,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 76 transitions, 329 flow [2024-05-12 13:06:15,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 13:06:15,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 13:06:15,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-05-12 13:06:15,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.635 [2024-05-12 13:06:15,587 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 135 flow. Second operand 4 states and 127 transitions. [2024-05-12 13:06:15,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 76 transitions, 329 flow [2024-05-12 13:06:15,589 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 13:06:15,590 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 181 flow [2024-05-12 13:06:15,590 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 13:06:15,591 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2024-05-12 13:06:15,591 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 181 flow [2024-05-12 13:06:15,592 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 13:06:15,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:15,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:15,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 13:06:15,592 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:15,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:15,593 INFO L85 PathProgramCache]: Analyzing trace with hash 38705774, now seen corresponding path program 1 times [2024-05-12 13:06:15,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:15,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246416021] [2024-05-12 13:06:15,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:15,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:15,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:17,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:06:17,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:17,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246416021] [2024-05-12 13:06:17,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246416021] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:17,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:17,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 13:06:17,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231731581] [2024-05-12 13:06:17,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:17,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 13:06:17,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:17,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 13:06:17,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 13:06:17,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:06:17,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:17,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:17,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:06:17,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:18,093 INFO L124 PetriNetUnfolderBase]: 4199/6804 cut-off events. [2024-05-12 13:06:18,093 INFO L125 PetriNetUnfolderBase]: For 2504/2504 co-relation queries the response was YES. [2024-05-12 13:06:18,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15652 conditions, 6804 events. 4199/6804 cut-off events. For 2504/2504 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 44009 event pairs, 1848 based on Foata normal form. 5/6393 useless extension candidates. Maximal degree in co-relation 15635. Up to 5877 conditions per place. [2024-05-12 13:06:18,135 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 72 selfloop transitions, 21 changer transitions 0/105 dead transitions. [2024-05-12 13:06:18,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 105 transitions, 529 flow [2024-05-12 13:06:18,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 13:06:18,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 13:06:18,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 165 transitions. [2024-05-12 13:06:18,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.66 [2024-05-12 13:06:18,141 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 181 flow. Second operand 5 states and 165 transitions. [2024-05-12 13:06:18,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 105 transitions, 529 flow [2024-05-12 13:06:18,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 105 transitions, 510 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-05-12 13:06:18,147 INFO L231 Difference]: Finished difference. Result has 64 places, 68 transitions, 310 flow [2024-05-12 13:06:18,148 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=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=310, PETRI_PLACES=64, PETRI_TRANSITIONS=68} [2024-05-12 13:06:18,149 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 8 predicate places. [2024-05-12 13:06:18,149 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 68 transitions, 310 flow [2024-05-12 13:06:18,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:18,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:18,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:18,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 13:06:18,150 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:18,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:18,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1458437779, now seen corresponding path program 1 times [2024-05-12 13:06:18,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:18,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801028011] [2024-05-12 13:06:18,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:18,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:18,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:19,669 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 13:06:19,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:19,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801028011] [2024-05-12 13:06:19,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801028011] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:19,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:19,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 13:06:19,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534892889] [2024-05-12 13:06:19,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:19,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 13:06:19,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:19,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 13:06:19,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 13:06:19,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:06:19,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 68 transitions, 310 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:19,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:19,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:06:19,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:20,828 INFO L124 PetriNetUnfolderBase]: 4243/7072 cut-off events. [2024-05-12 13:06:20,829 INFO L125 PetriNetUnfolderBase]: For 6550/6553 co-relation queries the response was YES. [2024-05-12 13:06:20,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18576 conditions, 7072 events. 4243/7072 cut-off events. For 6550/6553 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 47784 event pairs, 1880 based on Foata normal form. 12/6612 useless extension candidates. Maximal degree in co-relation 18556. Up to 5853 conditions per place. [2024-05-12 13:06:20,893 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 80 selfloop transitions, 25 changer transitions 0/117 dead transitions. [2024-05-12 13:06:20,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 117 transitions, 670 flow [2024-05-12 13:06:20,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:06:20,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:06:20,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 192 transitions. [2024-05-12 13:06:20,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-05-12 13:06:20,896 INFO L175 Difference]: Start difference. First operand has 64 places, 68 transitions, 310 flow. Second operand 6 states and 192 transitions. [2024-05-12 13:06:20,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 117 transitions, 670 flow [2024-05-12 13:06:20,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 117 transitions, 658 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-05-12 13:06:20,973 INFO L231 Difference]: Finished difference. Result has 69 places, 71 transitions, 385 flow [2024-05-12 13:06:20,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=385, PETRI_PLACES=69, PETRI_TRANSITIONS=71} [2024-05-12 13:06:20,974 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2024-05-12 13:06:20,974 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 71 transitions, 385 flow [2024-05-12 13:06:20,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:20,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:20,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:20,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 13:06:20,975 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:20,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:20,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1520191676, now seen corresponding path program 1 times [2024-05-12 13:06:20,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:20,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850176365] [2024-05-12 13:06:20,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:20,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:21,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:21,863 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 13:06:21,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:21,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850176365] [2024-05-12 13:06:21,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850176365] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:21,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:21,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 13:06:21,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659624503] [2024-05-12 13:06:21,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:21,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 13:06:21,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:21,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 13:06:21,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-05-12 13:06:21,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:06:21,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 71 transitions, 385 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 13:06:21,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:21,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:06:21,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:22,968 INFO L124 PetriNetUnfolderBase]: 4248/6494 cut-off events. [2024-05-12 13:06:22,969 INFO L125 PetriNetUnfolderBase]: For 8356/8356 co-relation queries the response was YES. [2024-05-12 13:06:22,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19571 conditions, 6494 events. 4248/6494 cut-off events. For 8356/8356 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 39158 event pairs, 1370 based on Foata normal form. 2/6215 useless extension candidates. Maximal degree in co-relation 19548. Up to 6056 conditions per place. [2024-05-12 13:06:23,009 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 70 selfloop transitions, 10 changer transitions 0/92 dead transitions. [2024-05-12 13:06:23,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 92 transitions, 593 flow [2024-05-12 13:06:23,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 13:06:23,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 13:06:23,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 139 transitions. [2024-05-12 13:06:23,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556 [2024-05-12 13:06:23,011 INFO L175 Difference]: Start difference. First operand has 69 places, 71 transitions, 385 flow. Second operand 5 states and 139 transitions. [2024-05-12 13:06:23,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 92 transitions, 593 flow [2024-05-12 13:06:23,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 92 transitions, 524 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-05-12 13:06:23,021 INFO L231 Difference]: Finished difference. Result has 70 places, 71 transitions, 345 flow [2024-05-12 13:06:23,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=345, PETRI_PLACES=70, PETRI_TRANSITIONS=71} [2024-05-12 13:06:23,022 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 14 predicate places. [2024-05-12 13:06:23,022 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 71 transitions, 345 flow [2024-05-12 13:06:23,023 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 13:06:23,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:23,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:23,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 13:06:23,024 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:23,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:23,025 INFO L85 PathProgramCache]: Analyzing trace with hash 117719940, now seen corresponding path program 1 times [2024-05-12 13:06:23,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:23,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173518798] [2024-05-12 13:06:23,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:23,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:23,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:23,994 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 13:06:23,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:23,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173518798] [2024-05-12 13:06:23,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173518798] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:23,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:23,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:06:23,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286337297] [2024-05-12 13:06:23,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:23,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:06:23,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:23,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:06:23,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:06:24,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:06:24,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 71 transitions, 345 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 13:06:24,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:24,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:06:24,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:25,326 INFO L124 PetriNetUnfolderBase]: 4987/7449 cut-off events. [2024-05-12 13:06:25,326 INFO L125 PetriNetUnfolderBase]: For 10217/10217 co-relation queries the response was YES. [2024-05-12 13:06:25,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22104 conditions, 7449 events. 4987/7449 cut-off events. For 10217/10217 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 43474 event pairs, 1658 based on Foata normal form. 2/7143 useless extension candidates. Maximal degree in co-relation 22079. Up to 7074 conditions per place. [2024-05-12 13:06:25,375 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 80 selfloop transitions, 14 changer transitions 0/105 dead transitions. [2024-05-12 13:06:25,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 105 transitions, 629 flow [2024-05-12 13:06:25,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:06:25,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:06:25,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-05-12 13:06:25,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-05-12 13:06:25,377 INFO L175 Difference]: Start difference. First operand has 70 places, 71 transitions, 345 flow. Second operand 6 states and 162 transitions. [2024-05-12 13:06:25,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 105 transitions, 629 flow [2024-05-12 13:06:25,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 105 transitions, 600 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-05-12 13:06:25,390 INFO L231 Difference]: Finished difference. Result has 72 places, 75 transitions, 389 flow [2024-05-12 13:06:25,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=389, PETRI_PLACES=72, PETRI_TRANSITIONS=75} [2024-05-12 13:06:25,394 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 16 predicate places. [2024-05-12 13:06:25,394 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 75 transitions, 389 flow [2024-05-12 13:06:25,395 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 13:06:25,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:25,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:25,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 13:06:25,395 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:25,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:25,396 INFO L85 PathProgramCache]: Analyzing trace with hash 86874004, now seen corresponding path program 1 times [2024-05-12 13:06:25,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:25,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25208904] [2024-05-12 13:06:25,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:25,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:25,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:25,526 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 13:06:25,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:25,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25208904] [2024-05-12 13:06:25,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25208904] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:25,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:25,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 13:06:25,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802914927] [2024-05-12 13:06:25,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:25,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 13:06:25,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:25,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 13:06:25,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 13:06:25,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 50 [2024-05-12 13:06:25,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 75 transitions, 389 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:25,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:25,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 50 [2024-05-12 13:06:25,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:25,884 INFO L124 PetriNetUnfolderBase]: 1310/2951 cut-off events. [2024-05-12 13:06:25,884 INFO L125 PetriNetUnfolderBase]: For 3688/4124 co-relation queries the response was YES. [2024-05-12 13:06:25,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6742 conditions, 2951 events. 1310/2951 cut-off events. For 3688/4124 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 24988 event pairs, 472 based on Foata normal form. 7/2705 useless extension candidates. Maximal degree in co-relation 6717. Up to 1754 conditions per place. [2024-05-12 13:06:25,912 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 28 selfloop transitions, 9 changer transitions 0/75 dead transitions. [2024-05-12 13:06:25,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 75 transitions, 413 flow [2024-05-12 13:06:25,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 13:06:25,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 13:06:25,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 109 transitions. [2024-05-12 13:06:25,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7266666666666667 [2024-05-12 13:06:25,914 INFO L175 Difference]: Start difference. First operand has 72 places, 75 transitions, 389 flow. Second operand 3 states and 109 transitions. [2024-05-12 13:06:25,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 75 transitions, 413 flow [2024-05-12 13:06:25,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 75 transitions, 383 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-05-12 13:06:25,918 INFO L231 Difference]: Finished difference. Result has 69 places, 67 transitions, 311 flow [2024-05-12 13:06:25,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=311, PETRI_PLACES=69, PETRI_TRANSITIONS=67} [2024-05-12 13:06:25,919 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2024-05-12 13:06:25,919 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 67 transitions, 311 flow [2024-05-12 13:06:25,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:25,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:25,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:25,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 13:06:25,920 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:25,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:25,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1775511907, now seen corresponding path program 1 times [2024-05-12 13:06:25,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:25,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207880897] [2024-05-12 13:06:25,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:25,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:25,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:26,813 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 13:06:26,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:26,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207880897] [2024-05-12 13:06:26,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207880897] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:26,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:26,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:06:26,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27128645] [2024-05-12 13:06:26,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:26,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:06:26,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:26,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:06:26,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:06:26,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:06:26,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 67 transitions, 311 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 13:06:26,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:26,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:06:26,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:27,848 INFO L124 PetriNetUnfolderBase]: 4876/7216 cut-off events. [2024-05-12 13:06:27,849 INFO L125 PetriNetUnfolderBase]: For 16245/16251 co-relation queries the response was YES. [2024-05-12 13:06:27,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22364 conditions, 7216 events. 4876/7216 cut-off events. For 16245/16251 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 41226 event pairs, 1489 based on Foata normal form. 8/7213 useless extension candidates. Maximal degree in co-relation 22340. Up to 6718 conditions per place. [2024-05-12 13:06:27,902 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 86 selfloop transitions, 30 changer transitions 0/128 dead transitions. [2024-05-12 13:06:27,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 128 transitions, 789 flow [2024-05-12 13:06:27,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:06:27,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:06:27,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-05-12 13:06:27,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5628571428571428 [2024-05-12 13:06:27,905 INFO L175 Difference]: Start difference. First operand has 69 places, 67 transitions, 311 flow. Second operand 7 states and 197 transitions. [2024-05-12 13:06:27,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 128 transitions, 789 flow [2024-05-12 13:06:27,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 128 transitions, 763 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 13:06:27,922 INFO L231 Difference]: Finished difference. Result has 76 places, 83 transitions, 486 flow [2024-05-12 13:06:27,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=486, PETRI_PLACES=76, PETRI_TRANSITIONS=83} [2024-05-12 13:06:27,923 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 20 predicate places. [2024-05-12 13:06:27,923 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 83 transitions, 486 flow [2024-05-12 13:06:27,924 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 13:06:27,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:27,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:27,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 13:06:27,924 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:27,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:27,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1560148381, now seen corresponding path program 2 times [2024-05-12 13:06:27,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:27,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124769435] [2024-05-12 13:06:27,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:27,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:27,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:28,856 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 13:06:28,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:28,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124769435] [2024-05-12 13:06:28,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124769435] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:28,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:28,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:06:28,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184043418] [2024-05-12 13:06:28,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:28,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:06:28,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:28,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:06:28,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:06:28,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:06:28,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 83 transitions, 486 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 13:06:28,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:28,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:06:28,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:29,896 INFO L124 PetriNetUnfolderBase]: 4918/7277 cut-off events. [2024-05-12 13:06:29,896 INFO L125 PetriNetUnfolderBase]: For 17841/17849 co-relation queries the response was YES. [2024-05-12 13:06:29,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23547 conditions, 7277 events. 4918/7277 cut-off events. For 17841/17849 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 41575 event pairs, 1508 based on Foata normal form. 10/7273 useless extension candidates. Maximal degree in co-relation 23519. Up to 6744 conditions per place. [2024-05-12 13:06:29,945 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 78 selfloop transitions, 34 changer transitions 0/124 dead transitions. [2024-05-12 13:06:29,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 124 transitions, 892 flow [2024-05-12 13:06:29,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:06:29,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:06:29,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-05-12 13:06:29,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5566666666666666 [2024-05-12 13:06:29,947 INFO L175 Difference]: Start difference. First operand has 76 places, 83 transitions, 486 flow. Second operand 6 states and 167 transitions. [2024-05-12 13:06:29,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 124 transitions, 892 flow [2024-05-12 13:06:29,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 124 transitions, 853 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-05-12 13:06:29,966 INFO L231 Difference]: Finished difference. Result has 79 places, 88 transitions, 586 flow [2024-05-12 13:06:29,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=586, PETRI_PLACES=79, PETRI_TRANSITIONS=88} [2024-05-12 13:06:29,966 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 23 predicate places. [2024-05-12 13:06:29,967 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 88 transitions, 586 flow [2024-05-12 13:06:29,967 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 13:06:29,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:29,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:29,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 13:06:29,968 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:29,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:29,968 INFO L85 PathProgramCache]: Analyzing trace with hash -615268381, now seen corresponding path program 3 times [2024-05-12 13:06:29,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:29,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339212064] [2024-05-12 13:06:29,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:29,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:29,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:06:30,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:30,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339212064] [2024-05-12 13:06:30,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339212064] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:30,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:30,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:06:30,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479338487] [2024-05-12 13:06:30,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:30,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:06:30,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:30,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:06:30,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:06:30,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:06:30,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 88 transitions, 586 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 13:06:30,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:30,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:06:30,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:31,937 INFO L124 PetriNetUnfolderBase]: 4901/7245 cut-off events. [2024-05-12 13:06:31,938 INFO L125 PetriNetUnfolderBase]: For 20621/20623 co-relation queries the response was YES. [2024-05-12 13:06:31,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23878 conditions, 7245 events. 4901/7245 cut-off events. For 20621/20623 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 41249 event pairs, 1524 based on Foata normal form. 3/7223 useless extension candidates. Maximal degree in co-relation 23849. Up to 6723 conditions per place. [2024-05-12 13:06:31,980 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 74 selfloop transitions, 35 changer transitions 0/121 dead transitions. [2024-05-12 13:06:31,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 121 transitions, 906 flow [2024-05-12 13:06:31,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:06:31,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:06:31,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-05-12 13:06:31,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5433333333333333 [2024-05-12 13:06:31,982 INFO L175 Difference]: Start difference. First operand has 79 places, 88 transitions, 586 flow. Second operand 6 states and 163 transitions. [2024-05-12 13:06:31,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 121 transitions, 906 flow [2024-05-12 13:06:32,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 121 transitions, 853 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-05-12 13:06:32,006 INFO L231 Difference]: Finished difference. Result has 82 places, 88 transitions, 613 flow [2024-05-12 13:06:32,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=613, PETRI_PLACES=82, PETRI_TRANSITIONS=88} [2024-05-12 13:06:32,008 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 26 predicate places. [2024-05-12 13:06:32,008 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 88 transitions, 613 flow [2024-05-12 13:06:32,008 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 13:06:32,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:32,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:32,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-05-12 13:06:32,009 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:32,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:32,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1559933055, now seen corresponding path program 1 times [2024-05-12 13:06:32,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:32,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306190641] [2024-05-12 13:06:32,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:32,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:32,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:32,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:06:32,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:32,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306190641] [2024-05-12 13:06:32,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306190641] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:32,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:32,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:06:32,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065797854] [2024-05-12 13:06:32,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:32,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:06:32,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:32,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:06:32,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:06:33,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:06:33,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 88 transitions, 613 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 13:06:33,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:33,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:06:33,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:34,269 INFO L124 PetriNetUnfolderBase]: 4458/6796 cut-off events. [2024-05-12 13:06:34,270 INFO L125 PetriNetUnfolderBase]: For 18345/18347 co-relation queries the response was YES. [2024-05-12 13:06:34,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22116 conditions, 6796 events. 4458/6796 cut-off events. For 18345/18347 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 39903 event pairs, 1348 based on Foata normal form. 4/6778 useless extension candidates. Maximal degree in co-relation 22086. Up to 6299 conditions per place. [2024-05-12 13:06:34,312 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 101 selfloop transitions, 14 changer transitions 5/131 dead transitions. [2024-05-12 13:06:34,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 131 transitions, 983 flow [2024-05-12 13:06:34,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:06:34,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:06:34,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-05-12 13:06:34,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-05-12 13:06:34,314 INFO L175 Difference]: Start difference. First operand has 82 places, 88 transitions, 613 flow. Second operand 7 states and 185 transitions. [2024-05-12 13:06:34,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 131 transitions, 983 flow [2024-05-12 13:06:34,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 131 transitions, 868 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-05-12 13:06:34,332 INFO L231 Difference]: Finished difference. Result has 83 places, 90 transitions, 560 flow [2024-05-12 13:06:34,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=560, PETRI_PLACES=83, PETRI_TRANSITIONS=90} [2024-05-12 13:06:34,333 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 27 predicate places. [2024-05-12 13:06:34,333 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 90 transitions, 560 flow [2024-05-12 13:06:34,333 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 13:06:34,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:34,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:34,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-05-12 13:06:34,334 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:34,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:34,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1290660125, now seen corresponding path program 1 times [2024-05-12 13:06:34,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:34,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732242803] [2024-05-12 13:06:34,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:34,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:34,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:35,397 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 13:06:35,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:35,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732242803] [2024-05-12 13:06:35,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732242803] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:35,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:35,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:06:35,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175165335] [2024-05-12 13:06:35,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:35,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:06:35,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:35,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:06:35,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:06:35,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:06:35,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 90 transitions, 560 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 13:06:35,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:35,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:06:35,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:36,558 INFO L124 PetriNetUnfolderBase]: 4562/6672 cut-off events. [2024-05-12 13:06:36,558 INFO L125 PetriNetUnfolderBase]: For 22027/22035 co-relation queries the response was YES. [2024-05-12 13:06:36,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23000 conditions, 6672 events. 4562/6672 cut-off events. For 22027/22035 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 36825 event pairs, 1374 based on Foata normal form. 5/6665 useless extension candidates. Maximal degree in co-relation 22969. Up to 6104 conditions per place. [2024-05-12 13:06:36,587 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 90 selfloop transitions, 39 changer transitions 0/139 dead transitions. [2024-05-12 13:06:36,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 139 transitions, 1030 flow [2024-05-12 13:06:36,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:06:36,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:06:36,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-05-12 13:06:36,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-05-12 13:06:36,589 INFO L175 Difference]: Start difference. First operand has 83 places, 90 transitions, 560 flow. Second operand 7 states and 185 transitions. [2024-05-12 13:06:36,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 139 transitions, 1030 flow [2024-05-12 13:06:36,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 139 transitions, 990 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-05-12 13:06:36,603 INFO L231 Difference]: Finished difference. Result has 84 places, 97 transitions, 667 flow [2024-05-12 13:06:36,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=667, PETRI_PLACES=84, PETRI_TRANSITIONS=97} [2024-05-12 13:06:36,604 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 28 predicate places. [2024-05-12 13:06:36,604 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 97 transitions, 667 flow [2024-05-12 13:06:36,604 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 13:06:36,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:36,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:36,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-05-12 13:06:36,605 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:36,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:36,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1893211617, now seen corresponding path program 2 times [2024-05-12 13:06:36,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:36,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981823616] [2024-05-12 13:06:36,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:36,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:36,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:37,510 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 13:06:37,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:37,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981823616] [2024-05-12 13:06:37,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981823616] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:37,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:37,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:06:37,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644131171] [2024-05-12 13:06:37,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:37,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:06:37,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:37,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:06:37,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:06:37,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:06:37,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 97 transitions, 667 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 13:06:37,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:37,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:06:37,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:38,578 INFO L124 PetriNetUnfolderBase]: 4585/6697 cut-off events. [2024-05-12 13:06:38,579 INFO L125 PetriNetUnfolderBase]: For 27637/27639 co-relation queries the response was YES. [2024-05-12 13:06:38,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24721 conditions, 6697 events. 4585/6697 cut-off events. For 27637/27639 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 36747 event pairs, 1388 based on Foata normal form. 2/6675 useless extension candidates. Maximal degree in co-relation 24689. Up to 6119 conditions per place. [2024-05-12 13:06:38,616 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 86 selfloop transitions, 48 changer transitions 0/144 dead transitions. [2024-05-12 13:06:38,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 144 transitions, 1193 flow [2024-05-12 13:06:38,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:06:38,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:06:38,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-05-12 13:06:38,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-05-12 13:06:38,618 INFO L175 Difference]: Start difference. First operand has 84 places, 97 transitions, 667 flow. Second operand 7 states and 185 transitions. [2024-05-12 13:06:38,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 144 transitions, 1193 flow [2024-05-12 13:06:38,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 144 transitions, 1148 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-05-12 13:06:38,641 INFO L231 Difference]: Finished difference. Result has 88 places, 103 transitions, 788 flow [2024-05-12 13:06:38,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=788, PETRI_PLACES=88, PETRI_TRANSITIONS=103} [2024-05-12 13:06:38,642 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 32 predicate places. [2024-05-12 13:06:38,642 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 103 transitions, 788 flow [2024-05-12 13:06:38,642 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 13:06:38,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:38,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:38,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-05-12 13:06:38,643 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:38,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:38,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1113528605, now seen corresponding path program 3 times [2024-05-12 13:06:38,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:38,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16472254] [2024-05-12 13:06:38,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:38,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:39,607 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 13:06:39,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:39,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16472254] [2024-05-12 13:06:39,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16472254] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:39,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:39,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:06:39,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197779690] [2024-05-12 13:06:39,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:39,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:06:39,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:39,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:06:39,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:06:39,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:06:39,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 103 transitions, 788 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 13:06:39,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:39,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:06:39,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:40,703 INFO L124 PetriNetUnfolderBase]: 4580/6689 cut-off events. [2024-05-12 13:06:40,704 INFO L125 PetriNetUnfolderBase]: For 32058/32060 co-relation queries the response was YES. [2024-05-12 13:06:40,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25607 conditions, 6689 events. 4580/6689 cut-off events. For 32058/32060 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 36767 event pairs, 1388 based on Foata normal form. 2/6667 useless extension candidates. Maximal degree in co-relation 25573. Up to 6116 conditions per place. [2024-05-12 13:06:40,747 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 89 selfloop transitions, 45 changer transitions 0/144 dead transitions. [2024-05-12 13:06:40,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 144 transitions, 1226 flow [2024-05-12 13:06:40,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:06:40,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:06:40,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-05-12 13:06:40,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5228571428571429 [2024-05-12 13:06:40,749 INFO L175 Difference]: Start difference. First operand has 88 places, 103 transitions, 788 flow. Second operand 7 states and 183 transitions. [2024-05-12 13:06:40,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 144 transitions, 1226 flow [2024-05-12 13:06:40,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 144 transitions, 1142 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-05-12 13:06:40,786 INFO L231 Difference]: Finished difference. Result has 92 places, 103 transitions, 803 flow [2024-05-12 13:06:40,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=704, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=803, PETRI_PLACES=92, PETRI_TRANSITIONS=103} [2024-05-12 13:06:40,787 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 36 predicate places. [2024-05-12 13:06:40,787 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 103 transitions, 803 flow [2024-05-12 13:06:40,788 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 13:06:40,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:40,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:40,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-05-12 13:06:40,788 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:40,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:40,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1880269947, now seen corresponding path program 1 times [2024-05-12 13:06:40,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:40,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548105313] [2024-05-12 13:06:40,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:40,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:40,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:41,908 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 13:06:41,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:41,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548105313] [2024-05-12 13:06:41,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548105313] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:41,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:41,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 13:06:41,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361017590] [2024-05-12 13:06:41,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:41,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 13:06:41,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:41,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 13:06:41,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 13:06:41,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:06:41,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 103 transitions, 803 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:41,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:41,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:06:41,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:42,779 INFO L124 PetriNetUnfolderBase]: 3783/6499 cut-off events. [2024-05-12 13:06:42,779 INFO L125 PetriNetUnfolderBase]: For 30374/30388 co-relation queries the response was YES. [2024-05-12 13:06:42,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22750 conditions, 6499 events. 3783/6499 cut-off events. For 30374/30388 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 43661 event pairs, 1514 based on Foata normal form. 5/6313 useless extension candidates. Maximal degree in co-relation 22714. Up to 5403 conditions per place. [2024-05-12 13:06:42,812 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 98 selfloop transitions, 9 changer transitions 0/124 dead transitions. [2024-05-12 13:06:42,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 124 transitions, 1111 flow [2024-05-12 13:06:42,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 13:06:42,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 13:06:42,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-05-12 13:06:42,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.512 [2024-05-12 13:06:42,814 INFO L175 Difference]: Start difference. First operand has 92 places, 103 transitions, 803 flow. Second operand 5 states and 128 transitions. [2024-05-12 13:06:42,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 124 transitions, 1111 flow [2024-05-12 13:06:42,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 124 transitions, 1000 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-05-12 13:06:42,842 INFO L231 Difference]: Finished difference. Result has 92 places, 110 transitions, 789 flow [2024-05-12 13:06:42,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=696, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=789, PETRI_PLACES=92, PETRI_TRANSITIONS=110} [2024-05-12 13:06:42,843 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 36 predicate places. [2024-05-12 13:06:42,843 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 110 transitions, 789 flow [2024-05-12 13:06:42,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:42,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:42,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:42,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-05-12 13:06:42,844 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:42,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:42,845 INFO L85 PathProgramCache]: Analyzing trace with hash -281926601, now seen corresponding path program 1 times [2024-05-12 13:06:42,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:42,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227044442] [2024-05-12 13:06:42,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:42,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:42,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:43,836 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 13:06:43,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:43,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227044442] [2024-05-12 13:06:43,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227044442] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:43,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:43,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:06:43,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018631359] [2024-05-12 13:06:43,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:43,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:06:43,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:43,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:06:43,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:06:43,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:06:43,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 110 transitions, 789 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:43,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:43,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:06:43,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:45,031 INFO L124 PetriNetUnfolderBase]: 4605/7372 cut-off events. [2024-05-12 13:06:45,032 INFO L125 PetriNetUnfolderBase]: For 38298/38307 co-relation queries the response was YES. [2024-05-12 13:06:45,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27245 conditions, 7372 events. 4605/7372 cut-off events. For 38298/38307 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 45809 event pairs, 1571 based on Foata normal form. 8/7161 useless extension candidates. Maximal degree in co-relation 27207. Up to 6143 conditions per place. [2024-05-12 13:06:45,091 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 98 selfloop transitions, 49 changer transitions 0/157 dead transitions. [2024-05-12 13:06:45,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 157 transitions, 1307 flow [2024-05-12 13:06:45,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:06:45,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:06:45,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-05-12 13:06:45,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5371428571428571 [2024-05-12 13:06:45,093 INFO L175 Difference]: Start difference. First operand has 92 places, 110 transitions, 789 flow. Second operand 7 states and 188 transitions. [2024-05-12 13:06:45,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 157 transitions, 1307 flow [2024-05-12 13:06:45,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 157 transitions, 1282 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-05-12 13:06:45,133 INFO L231 Difference]: Finished difference. Result has 97 places, 113 transitions, 905 flow [2024-05-12 13:06:45,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=905, PETRI_PLACES=97, PETRI_TRANSITIONS=113} [2024-05-12 13:06:45,134 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 41 predicate places. [2024-05-12 13:06:45,134 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 113 transitions, 905 flow [2024-05-12 13:06:45,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:45,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:45,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:45,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-05-12 13:06:45,135 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:45,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:45,135 INFO L85 PathProgramCache]: Analyzing trace with hash -281920804, now seen corresponding path program 1 times [2024-05-12 13:06:45,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:45,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411785156] [2024-05-12 13:06:45,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:45,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:45,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:46,178 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 13:06:46,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:46,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411785156] [2024-05-12 13:06:46,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411785156] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:46,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:46,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:06:46,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902511859] [2024-05-12 13:06:46,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:46,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:06:46,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:46,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:06:46,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:06:46,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:06:46,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 113 transitions, 905 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 13:06:46,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:46,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:06:46,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:47,562 INFO L124 PetriNetUnfolderBase]: 4697/7498 cut-off events. [2024-05-12 13:06:47,562 INFO L125 PetriNetUnfolderBase]: For 43796/43801 co-relation queries the response was YES. [2024-05-12 13:06:47,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28446 conditions, 7498 events. 4697/7498 cut-off events. For 43796/43801 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 46530 event pairs, 1365 based on Foata normal form. 8/7286 useless extension candidates. Maximal degree in co-relation 28406. Up to 6011 conditions per place. [2024-05-12 13:06:47,612 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 110 selfloop transitions, 53 changer transitions 0/173 dead transitions. [2024-05-12 13:06:47,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 173 transitions, 1511 flow [2024-05-12 13:06:47,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:06:47,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:06:47,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-05-12 13:06:47,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-05-12 13:06:47,613 INFO L175 Difference]: Start difference. First operand has 97 places, 113 transitions, 905 flow. Second operand 8 states and 215 transitions. [2024-05-12 13:06:47,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 173 transitions, 1511 flow [2024-05-12 13:06:47,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 173 transitions, 1364 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-05-12 13:06:47,647 INFO L231 Difference]: Finished difference. Result has 99 places, 120 transitions, 941 flow [2024-05-12 13:06:47,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=941, PETRI_PLACES=99, PETRI_TRANSITIONS=120} [2024-05-12 13:06:47,648 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 43 predicate places. [2024-05-12 13:06:47,648 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 120 transitions, 941 flow [2024-05-12 13:06:47,648 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 13:06:47,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:47,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:47,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-05-12 13:06:47,648 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:47,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:47,649 INFO L85 PathProgramCache]: Analyzing trace with hash -358948503, now seen corresponding path program 2 times [2024-05-12 13:06:47,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:47,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717054502] [2024-05-12 13:06:47,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:47,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:47,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:48,560 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 13:06:48,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:48,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717054502] [2024-05-12 13:06:48,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717054502] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:48,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:48,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:06:48,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307057899] [2024-05-12 13:06:48,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:48,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:06:48,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:48,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:06:48,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:06:48,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:06:48,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 120 transitions, 941 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:48,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:48,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:06:48,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:49,832 INFO L124 PetriNetUnfolderBase]: 4720/7558 cut-off events. [2024-05-12 13:06:49,833 INFO L125 PetriNetUnfolderBase]: For 49832/49837 co-relation queries the response was YES. [2024-05-12 13:06:49,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30063 conditions, 7558 events. 4720/7558 cut-off events. For 49832/49837 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 47096 event pairs, 1502 based on Foata normal form. 2/7337 useless extension candidates. Maximal degree in co-relation 30023. Up to 6295 conditions per place. [2024-05-12 13:06:49,878 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 102 selfloop transitions, 50 changer transitions 0/162 dead transitions. [2024-05-12 13:06:49,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 162 transitions, 1454 flow [2024-05-12 13:06:49,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:06:49,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:06:49,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-05-12 13:06:49,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257142857142857 [2024-05-12 13:06:49,880 INFO L175 Difference]: Start difference. First operand has 99 places, 120 transitions, 941 flow. Second operand 7 states and 184 transitions. [2024-05-12 13:06:49,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 162 transitions, 1454 flow [2024-05-12 13:06:49,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 162 transitions, 1392 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-05-12 13:06:49,934 INFO L231 Difference]: Finished difference. Result has 102 places, 123 transitions, 1023 flow [2024-05-12 13:06:49,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=879, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1023, PETRI_PLACES=102, PETRI_TRANSITIONS=123} [2024-05-12 13:06:49,934 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 46 predicate places. [2024-05-12 13:06:49,934 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 123 transitions, 1023 flow [2024-05-12 13:06:49,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:49,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:49,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:49,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-05-12 13:06:49,935 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:49,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:49,935 INFO L85 PathProgramCache]: Analyzing trace with hash -2114283028, now seen corresponding path program 2 times [2024-05-12 13:06:49,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:49,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720610769] [2024-05-12 13:06:49,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:49,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:49,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:50,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:06:50,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:50,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720610769] [2024-05-12 13:06:50,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720610769] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:50,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:50,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:06:50,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935992301] [2024-05-12 13:06:50,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:50,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:06:50,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:50,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:06:50,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:06:50,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:06:51,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 123 transitions, 1023 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 13:06:51,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:51,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:06:51,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:52,138 INFO L124 PetriNetUnfolderBase]: 4766/7134 cut-off events. [2024-05-12 13:06:52,139 INFO L125 PetriNetUnfolderBase]: For 54429/54431 co-relation queries the response was YES. [2024-05-12 13:06:52,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30272 conditions, 7134 events. 4766/7134 cut-off events. For 54429/54431 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 41020 event pairs, 1244 based on Foata normal form. 4/7061 useless extension candidates. Maximal degree in co-relation 30230. Up to 6047 conditions per place. [2024-05-12 13:06:52,182 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 111 selfloop transitions, 63 changer transitions 0/184 dead transitions. [2024-05-12 13:06:52,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 184 transitions, 1733 flow [2024-05-12 13:06:52,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:06:52,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:06:52,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-05-12 13:06:52,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-05-12 13:06:52,184 INFO L175 Difference]: Start difference. First operand has 102 places, 123 transitions, 1023 flow. Second operand 8 states and 216 transitions. [2024-05-12 13:06:52,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 184 transitions, 1733 flow [2024-05-12 13:06:52,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 184 transitions, 1652 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-05-12 13:06:52,233 INFO L231 Difference]: Finished difference. Result has 106 places, 129 transitions, 1146 flow [2024-05-12 13:06:52,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=942, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1146, PETRI_PLACES=106, PETRI_TRANSITIONS=129} [2024-05-12 13:06:52,234 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 50 predicate places. [2024-05-12 13:06:52,234 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 129 transitions, 1146 flow [2024-05-12 13:06:52,235 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 13:06:52,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:52,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:52,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-05-12 13:06:52,235 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:52,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:52,236 INFO L85 PathProgramCache]: Analyzing trace with hash -152027936, now seen corresponding path program 3 times [2024-05-12 13:06:52,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:52,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760787990] [2024-05-12 13:06:52,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:52,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:52,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:53,155 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 13:06:53,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:53,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760787990] [2024-05-12 13:06:53,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760787990] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:53,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:53,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:06:53,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974168665] [2024-05-12 13:06:53,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:53,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:06:53,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:53,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:06:53,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:06:53,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:06:53,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 129 transitions, 1146 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 13:06:53,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:53,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:06:53,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:54,416 INFO L124 PetriNetUnfolderBase]: 4812/7210 cut-off events. [2024-05-12 13:06:54,416 INFO L125 PetriNetUnfolderBase]: For 62056/62058 co-relation queries the response was YES. [2024-05-12 13:06:54,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31452 conditions, 7210 events. 4812/7210 cut-off events. For 62056/62058 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 41608 event pairs, 1243 based on Foata normal form. 4/7136 useless extension candidates. Maximal degree in co-relation 31409. Up to 6068 conditions per place. [2024-05-12 13:06:54,454 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 103 selfloop transitions, 71 changer transitions 0/184 dead transitions. [2024-05-12 13:06:54,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 184 transitions, 1822 flow [2024-05-12 13:06:54,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:06:54,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:06:54,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-05-12 13:06:54,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-05-12 13:06:54,456 INFO L175 Difference]: Start difference. First operand has 106 places, 129 transitions, 1146 flow. Second operand 8 states and 215 transitions. [2024-05-12 13:06:54,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 184 transitions, 1822 flow [2024-05-12 13:06:54,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 184 transitions, 1761 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-05-12 13:06:54,510 INFO L231 Difference]: Finished difference. Result has 111 places, 132 transitions, 1275 flow [2024-05-12 13:06:54,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1085, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1275, PETRI_PLACES=111, PETRI_TRANSITIONS=132} [2024-05-12 13:06:54,511 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 55 predicate places. [2024-05-12 13:06:54,511 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 132 transitions, 1275 flow [2024-05-12 13:06:54,511 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 13:06:54,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:54,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:54,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-05-12 13:06:54,512 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:54,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:54,512 INFO L85 PathProgramCache]: Analyzing trace with hash -152294846, now seen corresponding path program 4 times [2024-05-12 13:06:54,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:54,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568933956] [2024-05-12 13:06:54,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:54,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:54,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:55,526 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 13:06:55,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:55,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568933956] [2024-05-12 13:06:55,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568933956] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:55,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:55,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:06:55,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859647648] [2024-05-12 13:06:55,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:55,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:06:55,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:55,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:06:55,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:06:55,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:06:55,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 132 transitions, 1275 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 13:06:55,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:55,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:06:55,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:56,837 INFO L124 PetriNetUnfolderBase]: 4802/7187 cut-off events. [2024-05-12 13:06:56,837 INFO L125 PetriNetUnfolderBase]: For 65614/65616 co-relation queries the response was YES. [2024-05-12 13:06:56,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31818 conditions, 7187 events. 4802/7187 cut-off events. For 65614/65616 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 41434 event pairs, 1240 based on Foata normal form. 4/7116 useless extension candidates. Maximal degree in co-relation 31772. Up to 6064 conditions per place. [2024-05-12 13:06:56,877 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 104 selfloop transitions, 69 changer transitions 0/183 dead transitions. [2024-05-12 13:06:56,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 183 transitions, 1845 flow [2024-05-12 13:06:56,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:06:56,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:06:56,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-05-12 13:06:56,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.535 [2024-05-12 13:06:56,879 INFO L175 Difference]: Start difference. First operand has 111 places, 132 transitions, 1275 flow. Second operand 8 states and 214 transitions. [2024-05-12 13:06:56,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 183 transitions, 1845 flow [2024-05-12 13:06:56,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 183 transitions, 1640 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-05-12 13:06:56,938 INFO L231 Difference]: Finished difference. Result has 113 places, 132 transitions, 1216 flow [2024-05-12 13:06:56,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1070, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1216, PETRI_PLACES=113, PETRI_TRANSITIONS=132} [2024-05-12 13:06:56,938 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 57 predicate places. [2024-05-12 13:06:56,938 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 132 transitions, 1216 flow [2024-05-12 13:06:56,939 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 13:06:56,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:56,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:56,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-05-12 13:06:56,939 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:56,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:56,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1860321635, now seen corresponding path program 3 times [2024-05-12 13:06:56,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:56,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12432723] [2024-05-12 13:06:56,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:56,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:56,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:57,747 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 13:06:57,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:57,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12432723] [2024-05-12 13:06:57,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12432723] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:57,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:57,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:06:57,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256990693] [2024-05-12 13:06:57,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:57,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:06:57,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:57,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:06:57,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:06:57,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:06:57,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 132 transitions, 1216 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:57,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:57,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:06:57,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:58,839 INFO L124 PetriNetUnfolderBase]: 4797/7081 cut-off events. [2024-05-12 13:06:58,839 INFO L125 PetriNetUnfolderBase]: For 68728/68733 co-relation queries the response was YES. [2024-05-12 13:06:58,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31318 conditions, 7081 events. 4797/7081 cut-off events. For 68728/68733 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 39987 event pairs, 1345 based on Foata normal form. 4/7049 useless extension candidates. Maximal degree in co-relation 31272. Up to 6404 conditions per place. [2024-05-12 13:06:58,882 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 110 selfloop transitions, 47 changer transitions 0/167 dead transitions. [2024-05-12 13:06:58,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 167 transitions, 1636 flow [2024-05-12 13:06:58,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:06:58,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:06:58,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-05-12 13:06:58,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5085714285714286 [2024-05-12 13:06:58,884 INFO L175 Difference]: Start difference. First operand has 113 places, 132 transitions, 1216 flow. Second operand 7 states and 178 transitions. [2024-05-12 13:06:58,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 167 transitions, 1636 flow [2024-05-12 13:06:58,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 167 transitions, 1457 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-05-12 13:06:58,943 INFO L231 Difference]: Finished difference. Result has 112 places, 132 transitions, 1139 flow [2024-05-12 13:06:58,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1139, PETRI_PLACES=112, PETRI_TRANSITIONS=132} [2024-05-12 13:06:58,943 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 56 predicate places. [2024-05-12 13:06:58,943 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 132 transitions, 1139 flow [2024-05-12 13:06:58,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:58,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:58,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:58,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-05-12 13:06:58,944 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:58,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:58,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1841172308, now seen corresponding path program 1 times [2024-05-12 13:06:58,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:58,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50011672] [2024-05-12 13:06:58,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:58,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:58,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:00,309 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 13:07:00,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:00,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50011672] [2024-05-12 13:07:00,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50011672] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:00,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:00,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:07:00,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750759510] [2024-05-12 13:07:00,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:00,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:07:00,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:00,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:07:00,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:07:00,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:07:00,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 132 transitions, 1139 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:00,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:00,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:07:00,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:01,152 INFO L124 PetriNetUnfolderBase]: 3978/6611 cut-off events. [2024-05-12 13:07:01,152 INFO L125 PetriNetUnfolderBase]: For 62389/62401 co-relation queries the response was YES. [2024-05-12 13:07:01,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27444 conditions, 6611 events. 3978/6611 cut-off events. For 62389/62401 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 43095 event pairs, 1459 based on Foata normal form. 3/6481 useless extension candidates. Maximal degree in co-relation 27397. Up to 5648 conditions per place. [2024-05-12 13:07:01,197 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 123 selfloop transitions, 12 changer transitions 0/154 dead transitions. [2024-05-12 13:07:01,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 154 transitions, 1491 flow [2024-05-12 13:07:01,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:07:01,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:07:01,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-05-12 13:07:01,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5033333333333333 [2024-05-12 13:07:01,198 INFO L175 Difference]: Start difference. First operand has 112 places, 132 transitions, 1139 flow. Second operand 6 states and 151 transitions. [2024-05-12 13:07:01,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 154 transitions, 1491 flow [2024-05-12 13:07:01,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 154 transitions, 1346 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-05-12 13:07:01,249 INFO L231 Difference]: Finished difference. Result has 111 places, 135 transitions, 1056 flow [2024-05-12 13:07:01,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=994, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1056, PETRI_PLACES=111, PETRI_TRANSITIONS=135} [2024-05-12 13:07:01,249 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 55 predicate places. [2024-05-12 13:07:01,249 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 135 transitions, 1056 flow [2024-05-12 13:07:01,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:01,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:01,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:01,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-05-12 13:07:01,250 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:01,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:01,251 INFO L85 PathProgramCache]: Analyzing trace with hash 558114144, now seen corresponding path program 1 times [2024-05-12 13:07:01,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:01,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78436199] [2024-05-12 13:07:01,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:01,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:01,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:02,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:07:02,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:02,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78436199] [2024-05-12 13:07:02,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78436199] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:02,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:02,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:07:02,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044128012] [2024-05-12 13:07:02,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:02,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:07:02,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:02,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:07:02,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:07:02,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:07:02,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 135 transitions, 1056 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:02,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:02,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:07:02,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:03,312 INFO L124 PetriNetUnfolderBase]: 4596/7463 cut-off events. [2024-05-12 13:07:03,312 INFO L125 PetriNetUnfolderBase]: For 75930/75939 co-relation queries the response was YES. [2024-05-12 13:07:03,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31509 conditions, 7463 events. 4596/7463 cut-off events. For 75930/75939 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 47258 event pairs, 968 based on Foata normal form. 6/7254 useless extension candidates. Maximal degree in co-relation 31461. Up to 6091 conditions per place. [2024-05-12 13:07:03,361 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 125 selfloop transitions, 37 changer transitions 0/180 dead transitions. [2024-05-12 13:07:03,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 180 transitions, 1628 flow [2024-05-12 13:07:03,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:07:03,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:07:03,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-05-12 13:07:03,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5371428571428571 [2024-05-12 13:07:03,363 INFO L175 Difference]: Start difference. First operand has 111 places, 135 transitions, 1056 flow. Second operand 7 states and 188 transitions. [2024-05-12 13:07:03,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 180 transitions, 1628 flow [2024-05-12 13:07:03,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 180 transitions, 1588 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-05-12 13:07:03,423 INFO L231 Difference]: Finished difference. Result has 114 places, 139 transitions, 1149 flow [2024-05-12 13:07:03,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1016, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1149, PETRI_PLACES=114, PETRI_TRANSITIONS=139} [2024-05-12 13:07:03,424 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 58 predicate places. [2024-05-12 13:07:03,424 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 139 transitions, 1149 flow [2024-05-12 13:07:03,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:03,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:03,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:03,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-05-12 13:07:03,425 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:03,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:03,425 INFO L85 PathProgramCache]: Analyzing trace with hash 802956584, now seen corresponding path program 2 times [2024-05-12 13:07:03,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:03,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747395503] [2024-05-12 13:07:03,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:03,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:03,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:04,317 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 13:07:04,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:04,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747395503] [2024-05-12 13:07:04,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747395503] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:04,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:04,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:07:04,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144118849] [2024-05-12 13:07:04,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:04,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:07:04,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:04,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:07:04,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:07:04,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:07:04,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 139 transitions, 1149 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:04,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:04,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:07:04,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:05,400 INFO L124 PetriNetUnfolderBase]: 4588/7450 cut-off events. [2024-05-12 13:07:05,400 INFO L125 PetriNetUnfolderBase]: For 82031/82040 co-relation queries the response was YES. [2024-05-12 13:07:05,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32189 conditions, 7450 events. 4588/7450 cut-off events. For 82031/82040 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 47121 event pairs, 1302 based on Foata normal form. 6/7239 useless extension candidates. Maximal degree in co-relation 32140. Up to 6227 conditions per place. [2024-05-12 13:07:05,450 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 123 selfloop transitions, 38 changer transitions 0/179 dead transitions. [2024-05-12 13:07:05,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 179 transitions, 1597 flow [2024-05-12 13:07:05,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:07:05,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:07:05,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-05-12 13:07:05,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5314285714285715 [2024-05-12 13:07:05,452 INFO L175 Difference]: Start difference. First operand has 114 places, 139 transitions, 1149 flow. Second operand 7 states and 186 transitions. [2024-05-12 13:07:05,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 179 transitions, 1597 flow [2024-05-12 13:07:05,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 179 transitions, 1527 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-05-12 13:07:05,526 INFO L231 Difference]: Finished difference. Result has 118 places, 139 transitions, 1164 flow [2024-05-12 13:07:05,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1079, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1164, PETRI_PLACES=118, PETRI_TRANSITIONS=139} [2024-05-12 13:07:05,527 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 62 predicate places. [2024-05-12 13:07:05,527 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 139 transitions, 1164 flow [2024-05-12 13:07:05,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:05,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:05,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:05,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-05-12 13:07:05,528 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:05,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:05,528 INFO L85 PathProgramCache]: Analyzing trace with hash -149615168, now seen corresponding path program 1 times [2024-05-12 13:07:05,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:05,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475589211] [2024-05-12 13:07:05,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:05,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:05,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:06,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:07:06,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:06,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475589211] [2024-05-12 13:07:06,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475589211] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:06,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:06,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:07:06,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508144483] [2024-05-12 13:07:06,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:06,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:07:06,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:06,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:07:06,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:07:06,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:07:06,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 139 transitions, 1164 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:06,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:06,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:07:06,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:07,941 INFO L124 PetriNetUnfolderBase]: 4988/7999 cut-off events. [2024-05-12 13:07:07,941 INFO L125 PetriNetUnfolderBase]: For 91780/91785 co-relation queries the response was YES. [2024-05-12 13:07:07,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34992 conditions, 7999 events. 4988/7999 cut-off events. For 91780/91785 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 50144 event pairs, 1295 based on Foata normal form. 4/7777 useless extension candidates. Maximal degree in co-relation 34941. Up to 6243 conditions per place. [2024-05-12 13:07:07,988 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 124 selfloop transitions, 70 changer transitions 0/204 dead transitions. [2024-05-12 13:07:07,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 204 transitions, 2088 flow [2024-05-12 13:07:07,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:07:07,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:07:07,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-05-12 13:07:07,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5525 [2024-05-12 13:07:07,990 INFO L175 Difference]: Start difference. First operand has 118 places, 139 transitions, 1164 flow. Second operand 8 states and 221 transitions. [2024-05-12 13:07:07,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 204 transitions, 2088 flow [2024-05-12 13:07:08,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 204 transitions, 2003 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-05-12 13:07:08,048 INFO L231 Difference]: Finished difference. Result has 120 places, 148 transitions, 1341 flow [2024-05-12 13:07:08,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1079, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1341, PETRI_PLACES=120, PETRI_TRANSITIONS=148} [2024-05-12 13:07:08,048 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 64 predicate places. [2024-05-12 13:07:08,049 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 148 transitions, 1341 flow [2024-05-12 13:07:08,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:08,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:08,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:08,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-05-12 13:07:08,049 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:08,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:08,049 INFO L85 PathProgramCache]: Analyzing trace with hash 562885354, now seen corresponding path program 2 times [2024-05-12 13:07:08,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:08,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162620351] [2024-05-12 13:07:08,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:08,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:08,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:08,953 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 13:07:08,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:08,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162620351] [2024-05-12 13:07:08,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162620351] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:08,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:08,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:07:08,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611781176] [2024-05-12 13:07:08,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:08,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:07:08,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:08,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:07:08,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:07:09,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:07:09,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 148 transitions, 1341 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:09,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:09,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:07:09,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:10,374 INFO L124 PetriNetUnfolderBase]: 4978/7985 cut-off events. [2024-05-12 13:07:10,374 INFO L125 PetriNetUnfolderBase]: For 97498/97503 co-relation queries the response was YES. [2024-05-12 13:07:10,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35443 conditions, 7985 events. 4978/7985 cut-off events. For 97498/97503 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 50114 event pairs, 1306 based on Foata normal form. 4/7763 useless extension candidates. Maximal degree in co-relation 35391. Up to 6235 conditions per place. [2024-05-12 13:07:10,435 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 120 selfloop transitions, 71 changer transitions 0/201 dead transitions. [2024-05-12 13:07:10,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 201 transitions, 2059 flow [2024-05-12 13:07:10,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:07:10,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:07:10,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-05-12 13:07:10,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425 [2024-05-12 13:07:10,437 INFO L175 Difference]: Start difference. First operand has 120 places, 148 transitions, 1341 flow. Second operand 8 states and 217 transitions. [2024-05-12 13:07:10,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 201 transitions, 2059 flow [2024-05-12 13:07:10,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 201 transitions, 1953 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-05-12 13:07:10,546 INFO L231 Difference]: Finished difference. Result has 125 places, 148 transitions, 1386 flow [2024-05-12 13:07:10,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1235, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1386, PETRI_PLACES=125, PETRI_TRANSITIONS=148} [2024-05-12 13:07:10,547 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 69 predicate places. [2024-05-12 13:07:10,547 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 148 transitions, 1386 flow [2024-05-12 13:07:10,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:10,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:10,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:10,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-05-12 13:07:10,548 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:10,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:10,548 INFO L85 PathProgramCache]: Analyzing trace with hash 921049224, now seen corresponding path program 3 times [2024-05-12 13:07:10,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:10,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059372194] [2024-05-12 13:07:10,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:10,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:10,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:11,509 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 13:07:11,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:11,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059372194] [2024-05-12 13:07:11,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059372194] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:11,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:11,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:07:11,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84891946] [2024-05-12 13:07:11,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:11,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:07:11,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:11,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:07:11,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:07:11,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:07:11,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 148 transitions, 1386 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:11,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:11,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:07:11,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:12,850 INFO L124 PetriNetUnfolderBase]: 4968/7995 cut-off events. [2024-05-12 13:07:12,850 INFO L125 PetriNetUnfolderBase]: For 103335/103344 co-relation queries the response was YES. [2024-05-12 13:07:12,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35537 conditions, 7995 events. 4968/7995 cut-off events. For 103335/103344 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 50390 event pairs, 1283 based on Foata normal form. 10/7777 useless extension candidates. Maximal degree in co-relation 35484. Up to 6227 conditions per place. [2024-05-12 13:07:12,900 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 120 selfloop transitions, 74 changer transitions 0/204 dead transitions. [2024-05-12 13:07:12,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 204 transitions, 2042 flow [2024-05-12 13:07:12,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:07:12,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:07:12,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-05-12 13:07:12,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5475 [2024-05-12 13:07:12,902 INFO L175 Difference]: Start difference. First operand has 125 places, 148 transitions, 1386 flow. Second operand 8 states and 219 transitions. [2024-05-12 13:07:12,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 204 transitions, 2042 flow [2024-05-12 13:07:12,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 204 transitions, 1892 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-05-12 13:07:12,997 INFO L231 Difference]: Finished difference. Result has 127 places, 148 transitions, 1392 flow [2024-05-12 13:07:12,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1392, PETRI_PLACES=127, PETRI_TRANSITIONS=148} [2024-05-12 13:07:12,997 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 71 predicate places. [2024-05-12 13:07:12,997 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 148 transitions, 1392 flow [2024-05-12 13:07:12,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:12,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:12,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:12,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-05-12 13:07:12,998 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:12,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:12,999 INFO L85 PathProgramCache]: Analyzing trace with hash -24997024, now seen corresponding path program 1 times [2024-05-12 13:07:12,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:12,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177487091] [2024-05-12 13:07:12,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:12,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:13,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:13,894 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 13:07:13,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:13,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177487091] [2024-05-12 13:07:13,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177487091] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:13,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:13,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:07:13,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910006733] [2024-05-12 13:07:13,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:13,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:07:13,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:13,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:07:13,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:07:13,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:07:13,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 148 transitions, 1392 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 13:07:13,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:13,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:07:13,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:14,927 INFO L124 PetriNetUnfolderBase]: 4735/7626 cut-off events. [2024-05-12 13:07:14,928 INFO L125 PetriNetUnfolderBase]: For 109049/109065 co-relation queries the response was YES. [2024-05-12 13:07:14,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34686 conditions, 7626 events. 4735/7626 cut-off events. For 109049/109065 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 49042 event pairs, 1626 based on Foata normal form. 9/7475 useless extension candidates. Maximal degree in co-relation 34632. Up to 6702 conditions per place. [2024-05-12 13:07:14,977 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 149 selfloop transitions, 15 changer transitions 0/182 dead transitions. [2024-05-12 13:07:14,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 182 transitions, 1898 flow [2024-05-12 13:07:14,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:07:14,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:07:14,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-05-12 13:07:14,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5033333333333333 [2024-05-12 13:07:14,979 INFO L175 Difference]: Start difference. First operand has 127 places, 148 transitions, 1392 flow. Second operand 6 states and 151 transitions. [2024-05-12 13:07:14,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 182 transitions, 1898 flow [2024-05-12 13:07:15,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 182 transitions, 1642 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-05-12 13:07:15,054 INFO L231 Difference]: Finished difference. Result has 125 places, 157 transitions, 1292 flow [2024-05-12 13:07:15,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1149, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1292, PETRI_PLACES=125, PETRI_TRANSITIONS=157} [2024-05-12 13:07:15,055 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 69 predicate places. [2024-05-12 13:07:15,056 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 157 transitions, 1292 flow [2024-05-12 13:07:15,056 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 13:07:15,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:15,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:15,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-05-12 13:07:15,056 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:15,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:15,057 INFO L85 PathProgramCache]: Analyzing trace with hash -426171256, now seen corresponding path program 4 times [2024-05-12 13:07:15,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:15,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200613468] [2024-05-12 13:07:15,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:15,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:15,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:15,908 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 13:07:15,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:15,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200613468] [2024-05-12 13:07:15,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200613468] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:15,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:15,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:07:15,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652090298] [2024-05-12 13:07:15,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:15,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:07:15,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:15,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:07:15,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:07:16,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:07:16,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 157 transitions, 1292 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:16,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:16,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:07:16,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:17,239 INFO L124 PetriNetUnfolderBase]: 5087/7579 cut-off events. [2024-05-12 13:07:17,239 INFO L125 PetriNetUnfolderBase]: For 115471/115476 co-relation queries the response was YES. [2024-05-12 13:07:17,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36558 conditions, 7579 events. 5087/7579 cut-off events. For 115471/115476 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 43650 event pairs, 1126 based on Foata normal form. 6/7544 useless extension candidates. Maximal degree in co-relation 36503. Up to 6336 conditions per place. [2024-05-12 13:07:17,288 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 130 selfloop transitions, 74 changer transitions 0/214 dead transitions. [2024-05-12 13:07:17,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 214 transitions, 2136 flow [2024-05-12 13:07:17,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:07:17,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:07:17,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-05-12 13:07:17,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.535 [2024-05-12 13:07:17,290 INFO L175 Difference]: Start difference. First operand has 125 places, 157 transitions, 1292 flow. Second operand 8 states and 214 transitions. [2024-05-12 13:07:17,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 214 transitions, 2136 flow [2024-05-12 13:07:17,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 214 transitions, 2094 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-05-12 13:07:17,380 INFO L231 Difference]: Finished difference. Result has 130 places, 163 transitions, 1482 flow [2024-05-12 13:07:17,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1250, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1482, PETRI_PLACES=130, PETRI_TRANSITIONS=163} [2024-05-12 13:07:17,381 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 74 predicate places. [2024-05-12 13:07:17,381 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 163 transitions, 1482 flow [2024-05-12 13:07:17,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:17,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:17,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:17,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-05-12 13:07:17,382 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:17,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:17,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1689823352, now seen corresponding path program 5 times [2024-05-12 13:07:17,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:17,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639902369] [2024-05-12 13:07:17,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:17,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:17,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:18,248 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 13:07:18,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:18,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639902369] [2024-05-12 13:07:18,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639902369] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:18,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:18,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:07:18,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686333204] [2024-05-12 13:07:18,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:18,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:07:18,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:18,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:07:18,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:07:18,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:07:18,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 163 transitions, 1482 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:18,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:18,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:07:18,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:19,679 INFO L124 PetriNetUnfolderBase]: 5077/7565 cut-off events. [2024-05-12 13:07:19,679 INFO L125 PetriNetUnfolderBase]: For 122761/122766 co-relation queries the response was YES. [2024-05-12 13:07:19,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37326 conditions, 7565 events. 5077/7565 cut-off events. For 122761/122766 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 43658 event pairs, 1124 based on Foata normal form. 6/7530 useless extension candidates. Maximal degree in co-relation 37270. Up to 6328 conditions per place. [2024-05-12 13:07:19,736 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 127 selfloop transitions, 75 changer transitions 0/212 dead transitions. [2024-05-12 13:07:19,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 212 transitions, 2144 flow [2024-05-12 13:07:19,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:07:19,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:07:19,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-05-12 13:07:19,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5275 [2024-05-12 13:07:19,738 INFO L175 Difference]: Start difference. First operand has 130 places, 163 transitions, 1482 flow. Second operand 8 states and 211 transitions. [2024-05-12 13:07:19,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 212 transitions, 2144 flow [2024-05-12 13:07:19,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 212 transitions, 1932 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-05-12 13:07:19,837 INFO L231 Difference]: Finished difference. Result has 133 places, 163 transitions, 1428 flow [2024-05-12 13:07:19,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1270, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1428, PETRI_PLACES=133, PETRI_TRANSITIONS=163} [2024-05-12 13:07:19,838 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 77 predicate places. [2024-05-12 13:07:19,838 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 163 transitions, 1428 flow [2024-05-12 13:07:19,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:19,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:19,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:19,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-05-12 13:07:19,839 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:19,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:19,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1698104072, now seen corresponding path program 6 times [2024-05-12 13:07:19,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:19,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861447604] [2024-05-12 13:07:19,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:19,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:19,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:20,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:07:20,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:20,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861447604] [2024-05-12 13:07:20,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861447604] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:20,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:20,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:07:20,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127738716] [2024-05-12 13:07:20,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:20,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:07:20,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:20,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:07:20,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:07:20,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:07:20,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 163 transitions, 1428 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:20,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:20,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:07:20,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:22,048 INFO L124 PetriNetUnfolderBase]: 5067/7551 cut-off events. [2024-05-12 13:07:22,048 INFO L125 PetriNetUnfolderBase]: For 125499/125504 co-relation queries the response was YES. [2024-05-12 13:07:22,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37168 conditions, 7551 events. 5067/7551 cut-off events. For 125499/125504 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 43514 event pairs, 1133 based on Foata normal form. 6/7516 useless extension candidates. Maximal degree in co-relation 37111. Up to 6320 conditions per place. [2024-05-12 13:07:22,104 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 121 selfloop transitions, 78 changer transitions 0/209 dead transitions. [2024-05-12 13:07:22,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 209 transitions, 1972 flow [2024-05-12 13:07:22,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:07:22,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:07:22,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-05-12 13:07:22,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175 [2024-05-12 13:07:22,105 INFO L175 Difference]: Start difference. First operand has 133 places, 163 transitions, 1428 flow. Second operand 8 states and 207 transitions. [2024-05-12 13:07:22,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 209 transitions, 1972 flow [2024-05-12 13:07:22,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 209 transitions, 1779 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-05-12 13:07:22,202 INFO L231 Difference]: Finished difference. Result has 134 places, 163 transitions, 1399 flow [2024-05-12 13:07:22,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1235, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1399, PETRI_PLACES=134, PETRI_TRANSITIONS=163} [2024-05-12 13:07:22,203 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 78 predicate places. [2024-05-12 13:07:22,203 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 163 transitions, 1399 flow [2024-05-12 13:07:22,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:22,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:22,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:22,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-05-12 13:07:22,204 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:22,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:22,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1241782054, now seen corresponding path program 2 times [2024-05-12 13:07:22,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:22,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883858489] [2024-05-12 13:07:22,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:22,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:22,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:23,082 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 13:07:23,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:23,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883858489] [2024-05-12 13:07:23,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883858489] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:23,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:23,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:07:23,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732023432] [2024-05-12 13:07:23,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:23,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:07:23,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:23,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:07:23,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:07:23,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:07:23,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 163 transitions, 1399 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 13:07:23,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:23,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:07:23,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:24,071 INFO L124 PetriNetUnfolderBase]: 4813/7771 cut-off events. [2024-05-12 13:07:24,071 INFO L125 PetriNetUnfolderBase]: For 130785/130825 co-relation queries the response was YES. [2024-05-12 13:07:24,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36659 conditions, 7771 events. 4813/7771 cut-off events. For 130785/130825 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 50200 event pairs, 1640 based on Foata normal form. 23/7627 useless extension candidates. Maximal degree in co-relation 36601. Up to 6791 conditions per place. [2024-05-12 13:07:24,130 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 150 selfloop transitions, 20 changer transitions 0/188 dead transitions. [2024-05-12 13:07:24,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 188 transitions, 1851 flow [2024-05-12 13:07:24,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:07:24,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:07:24,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-05-12 13:07:24,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49333333333333335 [2024-05-12 13:07:24,132 INFO L175 Difference]: Start difference. First operand has 134 places, 163 transitions, 1399 flow. Second operand 6 states and 148 transitions. [2024-05-12 13:07:24,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 188 transitions, 1851 flow [2024-05-12 13:07:24,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 188 transitions, 1671 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-05-12 13:07:24,238 INFO L231 Difference]: Finished difference. Result has 132 places, 166 transitions, 1305 flow [2024-05-12 13:07:24,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1305, PETRI_PLACES=132, PETRI_TRANSITIONS=166} [2024-05-12 13:07:24,238 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 76 predicate places. [2024-05-12 13:07:24,239 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 166 transitions, 1305 flow [2024-05-12 13:07:24,239 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 13:07:24,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:24,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:24,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-05-12 13:07:24,239 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:24,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:24,240 INFO L85 PathProgramCache]: Analyzing trace with hash 76304820, now seen corresponding path program 1 times [2024-05-12 13:07:24,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:24,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414999790] [2024-05-12 13:07:24,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:24,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:24,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:25,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:07:25,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:25,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414999790] [2024-05-12 13:07:25,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414999790] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:25,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:25,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:07:25,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319434526] [2024-05-12 13:07:25,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:25,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:07:25,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:25,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:07:25,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:07:25,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:07:25,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 166 transitions, 1305 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:25,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:25,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:07:25,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:26,000 INFO L124 PetriNetUnfolderBase]: 4247/7083 cut-off events. [2024-05-12 13:07:26,000 INFO L125 PetriNetUnfolderBase]: For 117890/117902 co-relation queries the response was YES. [2024-05-12 13:07:26,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33142 conditions, 7083 events. 4247/7083 cut-off events. For 117890/117902 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 46826 event pairs, 1414 based on Foata normal form. 3/6941 useless extension candidates. Maximal degree in co-relation 33083. Up to 6022 conditions per place. [2024-05-12 13:07:26,054 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 161 selfloop transitions, 13 changer transitions 0/193 dead transitions. [2024-05-12 13:07:26,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 193 transitions, 1779 flow [2024-05-12 13:07:26,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:07:26,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:07:26,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-05-12 13:07:26,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-05-12 13:07:26,056 INFO L175 Difference]: Start difference. First operand has 132 places, 166 transitions, 1305 flow. Second operand 6 states and 153 transitions. [2024-05-12 13:07:26,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 193 transitions, 1779 flow [2024-05-12 13:07:26,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 193 transitions, 1715 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-05-12 13:07:26,152 INFO L231 Difference]: Finished difference. Result has 135 places, 173 transitions, 1356 flow [2024-05-12 13:07:26,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1241, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1356, PETRI_PLACES=135, PETRI_TRANSITIONS=173} [2024-05-12 13:07:26,153 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 79 predicate places. [2024-05-12 13:07:26,153 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 173 transitions, 1356 flow [2024-05-12 13:07:26,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:26,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:26,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:26,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-05-12 13:07:26,153 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:26,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:26,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1241776102, now seen corresponding path program 2 times [2024-05-12 13:07:26,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:26,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427813162] [2024-05-12 13:07:26,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:26,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:27,008 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 13:07:27,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:27,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427813162] [2024-05-12 13:07:27,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427813162] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:27,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:27,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:07:27,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420593421] [2024-05-12 13:07:27,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:27,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:07:27,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:27,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:07:27,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:07:27,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:07:27,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 173 transitions, 1356 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:27,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:27,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:07:27,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:27,937 INFO L124 PetriNetUnfolderBase]: 4252/7190 cut-off events. [2024-05-12 13:07:27,937 INFO L125 PetriNetUnfolderBase]: For 124923/124941 co-relation queries the response was YES. [2024-05-12 13:07:27,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34249 conditions, 7190 events. 4252/7190 cut-off events. For 124923/124941 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 48309 event pairs, 1410 based on Foata normal form. 7/7024 useless extension candidates. Maximal degree in co-relation 34188. Up to 6005 conditions per place. [2024-05-12 13:07:27,996 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 158 selfloop transitions, 18 changer transitions 0/195 dead transitions. [2024-05-12 13:07:27,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 195 transitions, 1808 flow [2024-05-12 13:07:27,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:07:27,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:07:27,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-05-12 13:07:27,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-05-12 13:07:27,997 INFO L175 Difference]: Start difference. First operand has 135 places, 173 transitions, 1356 flow. Second operand 6 states and 153 transitions. [2024-05-12 13:07:27,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 195 transitions, 1808 flow [2024-05-12 13:07:28,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 195 transitions, 1763 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-05-12 13:07:28,121 INFO L231 Difference]: Finished difference. Result has 138 places, 176 transitions, 1395 flow [2024-05-12 13:07:28,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1311, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1395, PETRI_PLACES=138, PETRI_TRANSITIONS=176} [2024-05-12 13:07:28,122 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 82 predicate places. [2024-05-12 13:07:28,122 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 176 transitions, 1395 flow [2024-05-12 13:07:28,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:28,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:28,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:28,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-05-12 13:07:28,122 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:28,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:28,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1698411902, now seen corresponding path program 1 times [2024-05-12 13:07:28,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:28,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853570673] [2024-05-12 13:07:28,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:28,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:28,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:29,376 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 13:07:29,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:29,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853570673] [2024-05-12 13:07:29,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853570673] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:29,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:29,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:07:29,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403009243] [2024-05-12 13:07:29,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:29,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:07:29,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:29,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:07:29,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:07:29,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:07:29,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 176 transitions, 1395 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:29,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:29,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:07:29,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:30,804 INFO L124 PetriNetUnfolderBase]: 4462/7345 cut-off events. [2024-05-12 13:07:30,804 INFO L125 PetriNetUnfolderBase]: For 132557/132559 co-relation queries the response was YES. [2024-05-12 13:07:30,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35756 conditions, 7345 events. 4462/7345 cut-off events. For 132557/132559 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 47980 event pairs, 1393 based on Foata normal form. 4/7199 useless extension candidates. Maximal degree in co-relation 35694. Up to 6277 conditions per place. [2024-05-12 13:07:30,861 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 195 selfloop transitions, 25 changer transitions 0/231 dead transitions. [2024-05-12 13:07:30,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 231 transitions, 2051 flow [2024-05-12 13:07:30,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:07:30,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:07:30,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-05-12 13:07:30,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5088888888888888 [2024-05-12 13:07:30,863 INFO L175 Difference]: Start difference. First operand has 138 places, 176 transitions, 1395 flow. Second operand 9 states and 229 transitions. [2024-05-12 13:07:30,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 231 transitions, 2051 flow [2024-05-12 13:07:30,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 231 transitions, 1989 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-05-12 13:07:30,971 INFO L231 Difference]: Finished difference. Result has 144 places, 181 transitions, 1452 flow [2024-05-12 13:07:30,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1333, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1452, PETRI_PLACES=144, PETRI_TRANSITIONS=181} [2024-05-12 13:07:30,972 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 88 predicate places. [2024-05-12 13:07:30,972 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 181 transitions, 1452 flow [2024-05-12 13:07:30,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:30,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:30,972 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 13:07:30,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-05-12 13:07:30,973 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:30,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:30,973 INFO L85 PathProgramCache]: Analyzing trace with hash -880021762, now seen corresponding path program 1 times [2024-05-12 13:07:30,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:30,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904710376] [2024-05-12 13:07:30,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:30,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:30,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:31,962 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 13:07:31,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:31,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904710376] [2024-05-12 13:07:31,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904710376] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:31,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:31,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:07:31,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216737453] [2024-05-12 13:07:31,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:31,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:07:31,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:31,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:07:31,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:07:32,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:07:32,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 181 transitions, 1452 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:32,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:32,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:07:32,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:33,345 INFO L124 PetriNetUnfolderBase]: 5117/8161 cut-off events. [2024-05-12 13:07:33,345 INFO L125 PetriNetUnfolderBase]: For 167657/167665 co-relation queries the response was YES. [2024-05-12 13:07:33,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41256 conditions, 8161 events. 5117/8161 cut-off events. For 167657/167665 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 51917 event pairs, 1192 based on Foata normal form. 5/7995 useless extension candidates. Maximal degree in co-relation 41192. Up to 6516 conditions per place. [2024-05-12 13:07:33,403 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 171 selfloop transitions, 54 changer transitions 0/235 dead transitions. [2024-05-12 13:07:33,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 235 transitions, 2248 flow [2024-05-12 13:07:33,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:07:33,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:07:33,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-05-12 13:07:33,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5225 [2024-05-12 13:07:33,404 INFO L175 Difference]: Start difference. First operand has 144 places, 181 transitions, 1452 flow. Second operand 8 states and 209 transitions. [2024-05-12 13:07:33,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 235 transitions, 2248 flow [2024-05-12 13:07:33,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 235 transitions, 2169 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-05-12 13:07:33,543 INFO L231 Difference]: Finished difference. Result has 146 places, 185 transitions, 1548 flow [2024-05-12 13:07:33,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1373, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1548, PETRI_PLACES=146, PETRI_TRANSITIONS=185} [2024-05-12 13:07:33,544 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 90 predicate places. [2024-05-12 13:07:33,544 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 185 transitions, 1548 flow [2024-05-12 13:07:33,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:33,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:33,545 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 13:07:33,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-05-12 13:07:33,545 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:33,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:33,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1242388614, now seen corresponding path program 2 times [2024-05-12 13:07:33,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:33,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95732220] [2024-05-12 13:07:33,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:33,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:33,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:34,415 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 13:07:34,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:34,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95732220] [2024-05-12 13:07:34,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95732220] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:34,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:34,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:07:34,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733952489] [2024-05-12 13:07:34,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:34,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:07:34,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:34,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:07:34,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:07:34,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:07:34,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 185 transitions, 1548 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:34,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:34,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:07:34,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:35,849 INFO L124 PetriNetUnfolderBase]: 5154/8158 cut-off events. [2024-05-12 13:07:35,849 INFO L125 PetriNetUnfolderBase]: For 177315/177323 co-relation queries the response was YES. [2024-05-12 13:07:35,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42176 conditions, 8158 events. 5154/8158 cut-off events. For 177315/177323 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 51509 event pairs, 1555 based on Foata normal form. 5/8004 useless extension candidates. Maximal degree in co-relation 42111. Up to 6875 conditions per place. [2024-05-12 13:07:35,927 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 166 selfloop transitions, 59 changer transitions 0/235 dead transitions. [2024-05-12 13:07:35,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 235 transitions, 2200 flow [2024-05-12 13:07:35,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:07:35,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:07:35,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-05-12 13:07:35,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175 [2024-05-12 13:07:35,928 INFO L175 Difference]: Start difference. First operand has 146 places, 185 transitions, 1548 flow. Second operand 8 states and 207 transitions. [2024-05-12 13:07:35,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 235 transitions, 2200 flow [2024-05-12 13:07:36,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 235 transitions, 2106 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-05-12 13:07:36,193 INFO L231 Difference]: Finished difference. Result has 150 places, 187 transitions, 1615 flow [2024-05-12 13:07:36,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1462, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1615, PETRI_PLACES=150, PETRI_TRANSITIONS=187} [2024-05-12 13:07:36,194 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 94 predicate places. [2024-05-12 13:07:36,194 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 187 transitions, 1615 flow [2024-05-12 13:07:36,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:36,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:36,194 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 13:07:36,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-05-12 13:07:36,194 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:36,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:36,195 INFO L85 PathProgramCache]: Analyzing trace with hash 285632024, now seen corresponding path program 3 times [2024-05-12 13:07:36,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:36,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276608370] [2024-05-12 13:07:36,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:36,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:36,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:37,109 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 13:07:37,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:37,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276608370] [2024-05-12 13:07:37,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276608370] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:37,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:37,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:07:37,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329074773] [2024-05-12 13:07:37,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:37,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:07:37,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:37,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:07:37,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:07:37,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:07:37,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 187 transitions, 1615 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:37,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:37,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:07:37,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:38,474 INFO L124 PetriNetUnfolderBase]: 5191/8209 cut-off events. [2024-05-12 13:07:38,474 INFO L125 PetriNetUnfolderBase]: For 185525/185533 co-relation queries the response was YES. [2024-05-12 13:07:38,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42934 conditions, 8209 events. 5191/8209 cut-off events. For 185525/185533 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 51808 event pairs, 1555 based on Foata normal form. 5/8056 useless extension candidates. Maximal degree in co-relation 42867. Up to 6837 conditions per place. [2024-05-12 13:07:38,546 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 168 selfloop transitions, 60 changer transitions 0/238 dead transitions. [2024-05-12 13:07:38,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 238 transitions, 2271 flow [2024-05-12 13:07:38,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:07:38,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:07:38,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-05-12 13:07:38,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-05-12 13:07:38,549 INFO L175 Difference]: Start difference. First operand has 150 places, 187 transitions, 1615 flow. Second operand 8 states and 208 transitions. [2024-05-12 13:07:38,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 238 transitions, 2271 flow [2024-05-12 13:07:38,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 238 transitions, 2140 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-05-12 13:07:38,746 INFO L231 Difference]: Finished difference. Result has 152 places, 189 transitions, 1643 flow [2024-05-12 13:07:38,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1484, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1643, PETRI_PLACES=152, PETRI_TRANSITIONS=189} [2024-05-12 13:07:38,747 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 96 predicate places. [2024-05-12 13:07:38,747 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 189 transitions, 1643 flow [2024-05-12 13:07:38,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:38,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:38,747 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 13:07:38,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-05-12 13:07:38,748 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:38,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:38,748 INFO L85 PathProgramCache]: Analyzing trace with hash -255125416, now seen corresponding path program 1 times [2024-05-12 13:07:38,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:38,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021268018] [2024-05-12 13:07:38,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:38,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:38,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:39,625 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 13:07:39,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:39,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021268018] [2024-05-12 13:07:39,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021268018] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:39,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:39,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:07:39,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272750194] [2024-05-12 13:07:39,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:39,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:07:39,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:39,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:07:39,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:07:39,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:07:39,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 189 transitions, 1643 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:39,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:39,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:07:39,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:40,938 INFO L124 PetriNetUnfolderBase]: 4954/8024 cut-off events. [2024-05-12 13:07:40,938 INFO L125 PetriNetUnfolderBase]: For 192847/192867 co-relation queries the response was YES. [2024-05-12 13:07:40,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42067 conditions, 8024 events. 4954/8024 cut-off events. For 192847/192867 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 52317 event pairs, 1564 based on Foata normal form. 20/7875 useless extension candidates. Maximal degree in co-relation 41999. Up to 6802 conditions per place. [2024-05-12 13:07:41,023 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 187 selfloop transitions, 43 changer transitions 0/252 dead transitions. [2024-05-12 13:07:41,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 252 transitions, 2574 flow [2024-05-12 13:07:41,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:07:41,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:07:41,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-05-12 13:07:41,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5228571428571429 [2024-05-12 13:07:41,024 INFO L175 Difference]: Start difference. First operand has 152 places, 189 transitions, 1643 flow. Second operand 7 states and 183 transitions. [2024-05-12 13:07:41,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 252 transitions, 2574 flow [2024-05-12 13:07:41,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 252 transitions, 2405 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-05-12 13:07:41,202 INFO L231 Difference]: Finished difference. Result has 155 places, 219 transitions, 2025 flow [2024-05-12 13:07:41,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1506, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2025, PETRI_PLACES=155, PETRI_TRANSITIONS=219} [2024-05-12 13:07:41,202 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 99 predicate places. [2024-05-12 13:07:41,203 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 219 transitions, 2025 flow [2024-05-12 13:07:41,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:41,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:41,203 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 13:07:41,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-05-12 13:07:41,203 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:41,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:41,204 INFO L85 PathProgramCache]: Analyzing trace with hash -348617192, now seen corresponding path program 4 times [2024-05-12 13:07:41,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:41,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823854125] [2024-05-12 13:07:41,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:41,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:41,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:42,078 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 13:07:42,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:42,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823854125] [2024-05-12 13:07:42,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823854125] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:42,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:42,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:07:42,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775067694] [2024-05-12 13:07:42,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:42,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:07:42,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:42,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:07:42,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:07:42,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:07:42,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 219 transitions, 2025 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:42,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:42,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:07:42,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:43,594 INFO L124 PetriNetUnfolderBase]: 5262/8365 cut-off events. [2024-05-12 13:07:43,595 INFO L125 PetriNetUnfolderBase]: For 208658/208678 co-relation queries the response was YES. [2024-05-12 13:07:43,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45568 conditions, 8365 events. 5262/8365 cut-off events. For 208658/208678 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 53321 event pairs, 1188 based on Foata normal form. 19/8216 useless extension candidates. Maximal degree in co-relation 45497. Up to 6865 conditions per place. [2024-05-12 13:07:43,677 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 186 selfloop transitions, 79 changer transitions 0/275 dead transitions. [2024-05-12 13:07:43,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 275 transitions, 2933 flow [2024-05-12 13:07:43,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:07:43,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:07:43,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-05-12 13:07:43,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.535 [2024-05-12 13:07:43,679 INFO L175 Difference]: Start difference. First operand has 155 places, 219 transitions, 2025 flow. Second operand 8 states and 214 transitions. [2024-05-12 13:07:43,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 275 transitions, 2933 flow [2024-05-12 13:07:43,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 275 transitions, 2839 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-05-12 13:07:43,885 INFO L231 Difference]: Finished difference. Result has 160 places, 221 transitions, 2128 flow [2024-05-12 13:07:43,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1931, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2128, PETRI_PLACES=160, PETRI_TRANSITIONS=221} [2024-05-12 13:07:43,885 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 104 predicate places. [2024-05-12 13:07:43,886 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 221 transitions, 2128 flow [2024-05-12 13:07:43,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:43,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:43,886 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 13:07:43,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-05-12 13:07:43,886 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:43,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:43,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1512249158, now seen corresponding path program 5 times [2024-05-12 13:07:43,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:43,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717024341] [2024-05-12 13:07:43,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:43,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:43,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:07:44,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:44,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717024341] [2024-05-12 13:07:44,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717024341] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:44,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:44,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:07:44,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745072016] [2024-05-12 13:07:44,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:44,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:07:44,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:44,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:07:44,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:07:44,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:07:44,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 221 transitions, 2128 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:44,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:44,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:07:44,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:46,373 INFO L124 PetriNetUnfolderBase]: 5299/8428 cut-off events. [2024-05-12 13:07:46,374 INFO L125 PetriNetUnfolderBase]: For 219602/219622 co-relation queries the response was YES. [2024-05-12 13:07:46,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46347 conditions, 8428 events. 5299/8428 cut-off events. For 219602/219622 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 53828 event pairs, 1565 based on Foata normal form. 19/8277 useless extension candidates. Maximal degree in co-relation 46275. Up to 7086 conditions per place. [2024-05-12 13:07:46,461 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 186 selfloop transitions, 78 changer transitions 0/274 dead transitions. [2024-05-12 13:07:46,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 274 transitions, 2894 flow [2024-05-12 13:07:46,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:07:46,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:07:46,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-05-12 13:07:46,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-05-12 13:07:46,465 INFO L175 Difference]: Start difference. First operand has 160 places, 221 transitions, 2128 flow. Second operand 8 states and 210 transitions. [2024-05-12 13:07:46,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 274 transitions, 2894 flow [2024-05-12 13:07:46,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 274 transitions, 2698 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-05-12 13:07:46,719 INFO L231 Difference]: Finished difference. Result has 162 places, 223 transitions, 2135 flow [2024-05-12 13:07:46,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1936, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2135, PETRI_PLACES=162, PETRI_TRANSITIONS=223} [2024-05-12 13:07:46,720 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 106 predicate places. [2024-05-12 13:07:46,720 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 223 transitions, 2135 flow [2024-05-12 13:07:46,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:46,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:46,720 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 13:07:46,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-05-12 13:07:46,721 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:46,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:46,721 INFO L85 PathProgramCache]: Analyzing trace with hash -699004774, now seen corresponding path program 6 times [2024-05-12 13:07:46,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:46,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761333898] [2024-05-12 13:07:46,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:46,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:46,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:47,600 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 13:07:47,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:47,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761333898] [2024-05-12 13:07:47,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761333898] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:47,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:47,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:07:47,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491755998] [2024-05-12 13:07:47,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:47,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:07:47,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:47,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:07:47,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:07:47,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:07:47,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 223 transitions, 2135 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:47,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:47,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:07:47,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:49,182 INFO L124 PetriNetUnfolderBase]: 5336/8483 cut-off events. [2024-05-12 13:07:49,183 INFO L125 PetriNetUnfolderBase]: For 229005/229013 co-relation queries the response was YES. [2024-05-12 13:07:49,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46711 conditions, 8483 events. 5336/8483 cut-off events. For 229005/229013 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 54210 event pairs, 1581 based on Foata normal form. 5/8316 useless extension candidates. Maximal degree in co-relation 46638. Up to 7141 conditions per place. [2024-05-12 13:07:49,271 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 186 selfloop transitions, 75 changer transitions 0/271 dead transitions. [2024-05-12 13:07:49,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 271 transitions, 2871 flow [2024-05-12 13:07:49,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:07:49,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:07:49,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-05-12 13:07:49,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515 [2024-05-12 13:07:49,273 INFO L175 Difference]: Start difference. First operand has 162 places, 223 transitions, 2135 flow. Second operand 8 states and 206 transitions. [2024-05-12 13:07:49,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 271 transitions, 2871 flow [2024-05-12 13:07:49,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 271 transitions, 2694 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-05-12 13:07:49,514 INFO L231 Difference]: Finished difference. Result has 164 places, 225 transitions, 2155 flow [2024-05-12 13:07:49,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1958, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2155, PETRI_PLACES=164, PETRI_TRANSITIONS=225} [2024-05-12 13:07:49,514 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 108 predicate places. [2024-05-12 13:07:49,515 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 225 transitions, 2155 flow [2024-05-12 13:07:49,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:49,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:49,515 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 13:07:49,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-05-12 13:07:49,515 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:49,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:49,515 INFO L85 PathProgramCache]: Analyzing trace with hash -254766436, now seen corresponding path program 2 times [2024-05-12 13:07:49,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:49,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032234185] [2024-05-12 13:07:49,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:49,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:49,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:50,597 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 13:07:50,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:50,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032234185] [2024-05-12 13:07:50,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032234185] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:50,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:50,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:07:50,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401426198] [2024-05-12 13:07:50,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:50,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:07:50,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:50,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:07:50,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:07:50,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:07:50,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 225 transitions, 2155 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:50,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:50,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:07:50,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:51,948 INFO L124 PetriNetUnfolderBase]: 5108/8296 cut-off events. [2024-05-12 13:07:51,948 INFO L125 PetriNetUnfolderBase]: For 238067/238079 co-relation queries the response was YES. [2024-05-12 13:07:51,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45985 conditions, 8296 events. 5108/8296 cut-off events. For 238067/238079 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 54589 event pairs, 1585 based on Foata normal form. 10/8129 useless extension candidates. Maximal degree in co-relation 45911. Up to 6918 conditions per place. [2024-05-12 13:07:52,027 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 190 selfloop transitions, 46 changer transitions 0/261 dead transitions. [2024-05-12 13:07:52,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 261 transitions, 2917 flow [2024-05-12 13:07:52,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:07:52,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:07:52,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-05-12 13:07:52,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-05-12 13:07:52,029 INFO L175 Difference]: Start difference. First operand has 164 places, 225 transitions, 2155 flow. Second operand 7 states and 180 transitions. [2024-05-12 13:07:52,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 261 transitions, 2917 flow [2024-05-12 13:07:52,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 261 transitions, 2742 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-05-12 13:07:52,242 INFO L231 Difference]: Finished difference. Result has 166 places, 233 transitions, 2219 flow [2024-05-12 13:07:52,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1980, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2219, PETRI_PLACES=166, PETRI_TRANSITIONS=233} [2024-05-12 13:07:52,243 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 110 predicate places. [2024-05-12 13:07:52,243 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 233 transitions, 2219 flow [2024-05-12 13:07:52,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:52,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:52,243 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 13:07:52,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-05-12 13:07:52,244 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:52,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:52,244 INFO L85 PathProgramCache]: Analyzing trace with hash -254765971, now seen corresponding path program 1 times [2024-05-12 13:07:52,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:52,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333525656] [2024-05-12 13:07:52,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:52,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:52,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:53,408 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 13:07:53,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:53,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333525656] [2024-05-12 13:07:53,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333525656] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:53,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:53,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:07:53,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220421499] [2024-05-12 13:07:53,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:53,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:07:53,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:53,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:07:53,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:07:53,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:07:53,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 233 transitions, 2219 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:53,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:53,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:07:53,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:54,767 INFO L124 PetriNetUnfolderBase]: 5135/8330 cut-off events. [2024-05-12 13:07:54,767 INFO L125 PetriNetUnfolderBase]: For 251747/251765 co-relation queries the response was YES. [2024-05-12 13:07:54,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47529 conditions, 8330 events. 5135/8330 cut-off events. For 251747/251765 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 54682 event pairs, 1570 based on Foata normal form. 19/8173 useless extension candidates. Maximal degree in co-relation 47453. Up to 7208 conditions per place. [2024-05-12 13:07:54,860 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 223 selfloop transitions, 18 changer transitions 0/266 dead transitions. [2024-05-12 13:07:54,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 266 transitions, 2855 flow [2024-05-12 13:07:54,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:07:54,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:07:54,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-05-12 13:07:54,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4942857142857143 [2024-05-12 13:07:54,861 INFO L175 Difference]: Start difference. First operand has 166 places, 233 transitions, 2219 flow. Second operand 7 states and 173 transitions. [2024-05-12 13:07:54,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 266 transitions, 2855 flow [2024-05-12 13:07:55,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 266 transitions, 2757 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-05-12 13:07:55,115 INFO L231 Difference]: Finished difference. Result has 170 places, 236 transitions, 2209 flow [2024-05-12 13:07:55,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2121, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2209, PETRI_PLACES=170, PETRI_TRANSITIONS=236} [2024-05-12 13:07:55,116 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 114 predicate places. [2024-05-12 13:07:55,116 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 236 transitions, 2209 flow [2024-05-12 13:07:55,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:55,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:55,117 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 13:07:55,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-05-12 13:07:55,117 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:55,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:55,117 INFO L85 PathProgramCache]: Analyzing trace with hash -326612888, now seen corresponding path program 7 times [2024-05-12 13:07:55,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:55,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748029445] [2024-05-12 13:07:55,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:55,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:55,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:56,072 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 13:07:56,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:56,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748029445] [2024-05-12 13:07:56,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748029445] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:56,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:56,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:07:56,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58467215] [2024-05-12 13:07:56,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:56,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:07:56,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:56,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:07:56,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:07:56,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:07:56,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 236 transitions, 2209 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:56,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:56,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:07:56,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:57,684 INFO L124 PetriNetUnfolderBase]: 5421/8613 cut-off events. [2024-05-12 13:07:57,684 INFO L125 PetriNetUnfolderBase]: For 261915/261923 co-relation queries the response was YES. [2024-05-12 13:07:57,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49621 conditions, 8613 events. 5421/8613 cut-off events. For 261915/261923 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 55064 event pairs, 1607 based on Foata normal form. 8/8436 useless extension candidates. Maximal degree in co-relation 49543. Up to 7255 conditions per place. [2024-05-12 13:07:57,766 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 197 selfloop transitions, 72 changer transitions 0/279 dead transitions. [2024-05-12 13:07:57,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 279 transitions, 2907 flow [2024-05-12 13:07:57,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:07:57,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:07:57,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-05-12 13:07:57,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.505 [2024-05-12 13:07:57,768 INFO L175 Difference]: Start difference. First operand has 170 places, 236 transitions, 2209 flow. Second operand 8 states and 202 transitions. [2024-05-12 13:07:57,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 279 transitions, 2907 flow [2024-05-12 13:07:58,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 279 transitions, 2821 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-05-12 13:07:58,008 INFO L231 Difference]: Finished difference. Result has 173 places, 236 transitions, 2274 flow [2024-05-12 13:07:58,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2123, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2274, PETRI_PLACES=173, PETRI_TRANSITIONS=236} [2024-05-12 13:07:58,009 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 117 predicate places. [2024-05-12 13:07:58,009 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 236 transitions, 2274 flow [2024-05-12 13:07:58,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:58,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:58,009 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 13:07:58,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-05-12 13:07:58,010 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:58,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:58,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1563637870, now seen corresponding path program 3 times [2024-05-12 13:07:58,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:58,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641090508] [2024-05-12 13:07:58,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:58,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:58,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:59,063 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 13:07:59,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:59,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641090508] [2024-05-12 13:07:59,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641090508] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:59,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:59,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:07:59,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318818260] [2024-05-12 13:07:59,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:59,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:07:59,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:59,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:07:59,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:07:59,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:07:59,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 236 transitions, 2274 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:59,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:59,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:07:59,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:00,422 INFO L124 PetriNetUnfolderBase]: 5158/8437 cut-off events. [2024-05-12 13:08:00,423 INFO L125 PetriNetUnfolderBase]: For 268634/268646 co-relation queries the response was YES. [2024-05-12 13:08:00,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48839 conditions, 8437 events. 5158/8437 cut-off events. For 268634/268646 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 55980 event pairs, 1584 based on Foata normal form. 10/8234 useless extension candidates. Maximal degree in co-relation 48760. Up to 6877 conditions per place. [2024-05-12 13:08:00,511 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 186 selfloop transitions, 59 changer transitions 0/270 dead transitions. [2024-05-12 13:08:00,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 270 transitions, 3168 flow [2024-05-12 13:08:00,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:08:00,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:08:00,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-05-12 13:08:00,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5114285714285715 [2024-05-12 13:08:00,512 INFO L175 Difference]: Start difference. First operand has 173 places, 236 transitions, 2274 flow. Second operand 7 states and 179 transitions. [2024-05-12 13:08:00,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 270 transitions, 3168 flow [2024-05-12 13:08:00,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 270 transitions, 2999 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-05-12 13:08:00,794 INFO L231 Difference]: Finished difference. Result has 174 places, 244 transitions, 2381 flow [2024-05-12 13:08:00,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2105, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2381, PETRI_PLACES=174, PETRI_TRANSITIONS=244} [2024-05-12 13:08:00,795 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 118 predicate places. [2024-05-12 13:08:00,795 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 244 transitions, 2381 flow [2024-05-12 13:08:00,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:00,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:00,795 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 13:08:00,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-05-12 13:08:00,795 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:08:00,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:00,796 INFO L85 PathProgramCache]: Analyzing trace with hash 159463469, now seen corresponding path program 2 times [2024-05-12 13:08:00,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:00,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746289854] [2024-05-12 13:08:00,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:00,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:00,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:02,045 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 13:08:02,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:02,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746289854] [2024-05-12 13:08:02,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746289854] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:02,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:02,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:08:02,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344102396] [2024-05-12 13:08:02,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:02,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:08:02,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:02,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:08:02,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:08:02,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:08:02,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 244 transitions, 2381 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:02,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:02,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:08:02,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:03,288 INFO L124 PetriNetUnfolderBase]: 5175/8507 cut-off events. [2024-05-12 13:08:03,288 INFO L125 PetriNetUnfolderBase]: For 286477/286523 co-relation queries the response was YES. [2024-05-12 13:08:03,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50486 conditions, 8507 events. 5175/8507 cut-off events. For 286477/286523 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 56942 event pairs, 1563 based on Foata normal form. 33/8327 useless extension candidates. Maximal degree in co-relation 50405. Up to 7246 conditions per place. [2024-05-12 13:08:03,375 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 226 selfloop transitions, 23 changer transitions 0/274 dead transitions. [2024-05-12 13:08:03,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 274 transitions, 3041 flow [2024-05-12 13:08:03,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:08:03,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:08:03,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-05-12 13:08:03,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-05-12 13:08:03,377 INFO L175 Difference]: Start difference. First operand has 174 places, 244 transitions, 2381 flow. Second operand 7 states and 170 transitions. [2024-05-12 13:08:03,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 274 transitions, 3041 flow [2024-05-12 13:08:03,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 274 transitions, 2863 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-05-12 13:08:03,681 INFO L231 Difference]: Finished difference. Result has 177 places, 247 transitions, 2311 flow [2024-05-12 13:08:03,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2203, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2311, PETRI_PLACES=177, PETRI_TRANSITIONS=247} [2024-05-12 13:08:03,682 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 121 predicate places. [2024-05-12 13:08:03,682 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 247 transitions, 2311 flow [2024-05-12 13:08:03,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:03,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:03,682 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 13:08:03,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-05-12 13:08:03,683 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:08:03,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:03,683 INFO L85 PathProgramCache]: Analyzing trace with hash 159968459, now seen corresponding path program 3 times [2024-05-12 13:08:03,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:03,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618003704] [2024-05-12 13:08:03,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:03,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:03,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:04,940 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 13:08:04,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:04,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618003704] [2024-05-12 13:08:04,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618003704] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:04,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:04,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:08:04,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104720244] [2024-05-12 13:08:04,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:04,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:08:04,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:04,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:08:04,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:08:05,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:08:05,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 247 transitions, 2311 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:05,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:05,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:08:05,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:06,249 INFO L124 PetriNetUnfolderBase]: 5177/8508 cut-off events. [2024-05-12 13:08:06,249 INFO L125 PetriNetUnfolderBase]: For 292598/292644 co-relation queries the response was YES. [2024-05-12 13:08:06,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50170 conditions, 8508 events. 5177/8508 cut-off events. For 292598/292644 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 56865 event pairs, 1563 based on Foata normal form. 33/8330 useless extension candidates. Maximal degree in co-relation 50088. Up to 7216 conditions per place. [2024-05-12 13:08:06,337 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 224 selfloop transitions, 31 changer transitions 0/280 dead transitions. [2024-05-12 13:08:06,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 280 transitions, 3003 flow [2024-05-12 13:08:06,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:08:06,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:08:06,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-05-12 13:08:06,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48857142857142855 [2024-05-12 13:08:06,338 INFO L175 Difference]: Start difference. First operand has 177 places, 247 transitions, 2311 flow. Second operand 7 states and 171 transitions. [2024-05-12 13:08:06,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 280 transitions, 3003 flow [2024-05-12 13:08:06,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 280 transitions, 2917 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-05-12 13:08:06,640 INFO L231 Difference]: Finished difference. Result has 180 places, 253 transitions, 2385 flow [2024-05-12 13:08:06,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2225, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2385, PETRI_PLACES=180, PETRI_TRANSITIONS=253} [2024-05-12 13:08:06,640 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 124 predicate places. [2024-05-12 13:08:06,640 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 253 transitions, 2385 flow [2024-05-12 13:08:06,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:06,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:06,641 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 13:08:06,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-05-12 13:08:06,641 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:08:06,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:06,641 INFO L85 PathProgramCache]: Analyzing trace with hash -77630638, now seen corresponding path program 1 times [2024-05-12 13:08:06,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:06,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619183553] [2024-05-12 13:08:06,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:06,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:06,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:07,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:08:07,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:07,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619183553] [2024-05-12 13:08:07,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619183553] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:07,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:07,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:08:07,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367832624] [2024-05-12 13:08:07,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:07,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:08:07,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:07,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:08:07,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:08:07,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:08:07,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 253 transitions, 2385 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:07,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:07,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:08:07,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:08,863 INFO L124 PetriNetUnfolderBase]: 5099/8291 cut-off events. [2024-05-12 13:08:08,863 INFO L125 PetriNetUnfolderBase]: For 307849/307879 co-relation queries the response was YES. [2024-05-12 13:08:08,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50779 conditions, 8291 events. 5099/8291 cut-off events. For 307849/307879 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 54425 event pairs, 1445 based on Foata normal form. 1/8113 useless extension candidates. Maximal degree in co-relation 50695. Up to 7180 conditions per place. [2024-05-12 13:08:08,948 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 254 selfloop transitions, 17 changer transitions 0/286 dead transitions. [2024-05-12 13:08:08,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 286 transitions, 3092 flow [2024-05-12 13:08:08,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:08:08,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:08:08,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-05-12 13:08:08,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49142857142857144 [2024-05-12 13:08:08,950 INFO L175 Difference]: Start difference. First operand has 180 places, 253 transitions, 2385 flow. Second operand 7 states and 172 transitions. [2024-05-12 13:08:08,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 286 transitions, 3092 flow [2024-05-12 13:08:09,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 286 transitions, 3019 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-05-12 13:08:09,339 INFO L231 Difference]: Finished difference. Result has 185 places, 260 transitions, 2450 flow [2024-05-12 13:08:09,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2312, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2450, PETRI_PLACES=185, PETRI_TRANSITIONS=260} [2024-05-12 13:08:09,339 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 129 predicate places. [2024-05-12 13:08:09,339 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 260 transitions, 2450 flow [2024-05-12 13:08:09,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:09,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:09,340 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 13:08:09,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-05-12 13:08:09,340 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:08:09,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:09,340 INFO L85 PathProgramCache]: Analyzing trace with hash -77449939, now seen corresponding path program 1 times [2024-05-12 13:08:09,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:09,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555574385] [2024-05-12 13:08:09,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:09,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:09,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:10,359 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 13:08:10,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:10,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555574385] [2024-05-12 13:08:10,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555574385] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:10,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:10,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:08:10,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822068622] [2024-05-12 13:08:10,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:10,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:08:10,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:10,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:08:10,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:08:10,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:08:10,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 260 transitions, 2450 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:10,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:10,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:08:10,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:11,702 INFO L124 PetriNetUnfolderBase]: 4874/8055 cut-off events. [2024-05-12 13:08:11,702 INFO L125 PetriNetUnfolderBase]: For 322772/322802 co-relation queries the response was YES. [2024-05-12 13:08:11,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50634 conditions, 8055 events. 4874/8055 cut-off events. For 322772/322802 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 53889 event pairs, 1412 based on Foata normal form. 3/7880 useless extension candidates. Maximal degree in co-relation 50547. Up to 6730 conditions per place. [2024-05-12 13:08:11,789 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 241 selfloop transitions, 16 changer transitions 0/289 dead transitions. [2024-05-12 13:08:11,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 289 transitions, 3102 flow [2024-05-12 13:08:11,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:08:11,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:08:11,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-05-12 13:08:11,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5057142857142857 [2024-05-12 13:08:11,791 INFO L175 Difference]: Start difference. First operand has 185 places, 260 transitions, 2450 flow. Second operand 7 states and 177 transitions. [2024-05-12 13:08:11,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 289 transitions, 3102 flow [2024-05-12 13:08:12,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 289 transitions, 3029 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-05-12 13:08:12,194 INFO L231 Difference]: Finished difference. Result has 188 places, 263 transitions, 2461 flow [2024-05-12 13:08:12,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2377, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2461, PETRI_PLACES=188, PETRI_TRANSITIONS=263} [2024-05-12 13:08:12,194 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 132 predicate places. [2024-05-12 13:08:12,195 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 263 transitions, 2461 flow [2024-05-12 13:08:12,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:12,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:12,195 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 13:08:12,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-05-12 13:08:12,195 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:08:12,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:12,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1929516676, now seen corresponding path program 2 times [2024-05-12 13:08:12,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:12,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753753006] [2024-05-12 13:08:12,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:12,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:12,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:13,093 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 13:08:13,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:13,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753753006] [2024-05-12 13:08:13,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753753006] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:13,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:13,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:08:13,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887418461] [2024-05-12 13:08:13,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:13,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:08:13,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:13,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:08:13,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:08:13,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:08:13,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 263 transitions, 2461 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:13,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:13,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:08:13,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:14,480 INFO L124 PetriNetUnfolderBase]: 5130/8332 cut-off events. [2024-05-12 13:08:14,480 INFO L125 PetriNetUnfolderBase]: For 333122/333152 co-relation queries the response was YES. [2024-05-12 13:08:14,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53015 conditions, 8332 events. 5130/8332 cut-off events. For 333122/333152 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 54604 event pairs, 1438 based on Foata normal form. 1/8155 useless extension candidates. Maximal degree in co-relation 52927. Up to 7201 conditions per place. [2024-05-12 13:08:14,574 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 254 selfloop transitions, 22 changer transitions 0/291 dead transitions. [2024-05-12 13:08:14,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 291 transitions, 3159 flow [2024-05-12 13:08:14,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:08:14,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:08:14,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-05-12 13:08:14,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49142857142857144 [2024-05-12 13:08:14,575 INFO L175 Difference]: Start difference. First operand has 188 places, 263 transitions, 2461 flow. Second operand 7 states and 172 transitions. [2024-05-12 13:08:14,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 291 transitions, 3159 flow [2024-05-12 13:08:14,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 291 transitions, 3099 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-05-12 13:08:14,921 INFO L231 Difference]: Finished difference. Result has 190 places, 266 transitions, 2509 flow [2024-05-12 13:08:14,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2401, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2509, PETRI_PLACES=190, PETRI_TRANSITIONS=266} [2024-05-12 13:08:14,921 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 134 predicate places. [2024-05-12 13:08:14,921 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 266 transitions, 2509 flow [2024-05-12 13:08:14,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:14,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:14,922 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 13:08:14,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-05-12 13:08:14,922 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:08:14,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:14,922 INFO L85 PathProgramCache]: Analyzing trace with hash 159647981, now seen corresponding path program 2 times [2024-05-12 13:08:14,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:14,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908887122] [2024-05-12 13:08:14,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:14,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:14,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:16,124 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 13:08:16,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:16,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908887122] [2024-05-12 13:08:16,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908887122] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:16,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:16,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:08:16,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963858308] [2024-05-12 13:08:16,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:16,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:08:16,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:16,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:08:16,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:08:16,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:08:16,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 266 transitions, 2509 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:16,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:16,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:08:16,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:17,430 INFO L124 PetriNetUnfolderBase]: 4946/8285 cut-off events. [2024-05-12 13:08:17,430 INFO L125 PetriNetUnfolderBase]: For 349277/349316 co-relation queries the response was YES. [2024-05-12 13:08:17,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52887 conditions, 8285 events. 4946/8285 cut-off events. For 349277/349316 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 56373 event pairs, 1407 based on Foata normal form. 9/8078 useless extension candidates. Maximal degree in co-relation 52798. Up to 6797 conditions per place. [2024-05-12 13:08:17,517 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 240 selfloop transitions, 21 changer transitions 0/294 dead transitions. [2024-05-12 13:08:17,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 294 transitions, 3183 flow [2024-05-12 13:08:17,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:08:17,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:08:17,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-05-12 13:08:17,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5057142857142857 [2024-05-12 13:08:17,518 INFO L175 Difference]: Start difference. First operand has 190 places, 266 transitions, 2509 flow. Second operand 7 states and 177 transitions. [2024-05-12 13:08:17,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 294 transitions, 3183 flow [2024-05-12 13:08:17,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 294 transitions, 3097 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-05-12 13:08:17,953 INFO L231 Difference]: Finished difference. Result has 192 places, 269 transitions, 2525 flow [2024-05-12 13:08:17,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2423, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2525, PETRI_PLACES=192, PETRI_TRANSITIONS=269} [2024-05-12 13:08:17,953 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 136 predicate places. [2024-05-12 13:08:17,953 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 269 transitions, 2525 flow [2024-05-12 13:08:17,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:17,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:17,954 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 13:08:17,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-05-12 13:08:17,955 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:08:17,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:17,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1563453172, now seen corresponding path program 3 times [2024-05-12 13:08:17,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:17,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808460930] [2024-05-12 13:08:17,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:17,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:17,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:18,951 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 13:08:18,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:18,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808460930] [2024-05-12 13:08:18,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808460930] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:18,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:18,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:08:18,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861750311] [2024-05-12 13:08:18,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:18,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:08:18,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:18,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:08:18,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:08:19,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:08:19,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 269 transitions, 2525 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:19,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:19,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:08:19,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:20,285 INFO L124 PetriNetUnfolderBase]: 5188/8539 cut-off events. [2024-05-12 13:08:20,286 INFO L125 PetriNetUnfolderBase]: For 359292/359331 co-relation queries the response was YES. [2024-05-12 13:08:20,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55158 conditions, 8539 events. 5188/8539 cut-off events. For 359292/359331 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 56970 event pairs, 1436 based on Foata normal form. 3/8327 useless extension candidates. Maximal degree in co-relation 55068. Up to 7243 conditions per place. [2024-05-12 13:08:20,376 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 252 selfloop transitions, 29 changer transitions 0/296 dead transitions. [2024-05-12 13:08:20,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 296 transitions, 3247 flow [2024-05-12 13:08:20,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:08:20,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:08:20,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-05-12 13:08:20,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49142857142857144 [2024-05-12 13:08:20,377 INFO L175 Difference]: Start difference. First operand has 192 places, 269 transitions, 2525 flow. Second operand 7 states and 172 transitions. [2024-05-12 13:08:20,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 296 transitions, 3247 flow [2024-05-12 13:08:20,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 296 transitions, 3169 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-05-12 13:08:20,824 INFO L231 Difference]: Finished difference. Result has 194 places, 272 transitions, 2577 flow [2024-05-12 13:08:20,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2447, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2577, PETRI_PLACES=194, PETRI_TRANSITIONS=272} [2024-05-12 13:08:20,824 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 138 predicate places. [2024-05-12 13:08:20,825 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 272 transitions, 2577 flow [2024-05-12 13:08:20,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:20,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:20,825 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 13:08:20,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-05-12 13:08:20,825 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:08:20,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:20,825 INFO L85 PathProgramCache]: Analyzing trace with hash 159974411, now seen corresponding path program 3 times [2024-05-12 13:08:20,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:20,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936559458] [2024-05-12 13:08:20,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:20,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:20,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:22,157 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 13:08:22,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:22,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936559458] [2024-05-12 13:08:22,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936559458] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:22,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:22,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:08:22,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211994407] [2024-05-12 13:08:22,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:22,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:08:22,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:22,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:08:22,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:08:22,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:08:22,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 272 transitions, 2577 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:22,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:22,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:08:22,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:23,511 INFO L124 PetriNetUnfolderBase]: 4967/8375 cut-off events. [2024-05-12 13:08:23,512 INFO L125 PetriNetUnfolderBase]: For 372871/372916 co-relation queries the response was YES. [2024-05-12 13:08:23,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54448 conditions, 8375 events. 4967/8375 cut-off events. For 372871/372916 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 57635 event pairs, 1407 based on Foata normal form. 9/8155 useless extension candidates. Maximal degree in co-relation 54357. Up to 6760 conditions per place. [2024-05-12 13:08:23,603 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 238 selfloop transitions, 33 changer transitions 0/305 dead transitions. [2024-05-12 13:08:23,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 305 transitions, 3455 flow [2024-05-12 13:08:23,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:08:23,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:08:23,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-05-12 13:08:23,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-05-12 13:08:23,605 INFO L175 Difference]: Start difference. First operand has 194 places, 272 transitions, 2577 flow. Second operand 7 states and 180 transitions. [2024-05-12 13:08:23,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 305 transitions, 3455 flow [2024-05-12 13:08:24,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 305 transitions, 3347 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-05-12 13:08:24,160 INFO L231 Difference]: Finished difference. Result has 197 places, 278 transitions, 2689 flow [2024-05-12 13:08:24,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2469, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2689, PETRI_PLACES=197, PETRI_TRANSITIONS=278} [2024-05-12 13:08:24,161 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 141 predicate places. [2024-05-12 13:08:24,161 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 278 transitions, 2689 flow [2024-05-12 13:08:24,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:24,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:24,161 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 13:08:24,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-05-12 13:08:24,161 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:08:24,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:24,162 INFO L85 PathProgramCache]: Analyzing trace with hash 159986315, now seen corresponding path program 1 times [2024-05-12 13:08:24,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:24,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713670115] [2024-05-12 13:08:24,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:24,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:24,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:25,649 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 13:08:25,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:25,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713670115] [2024-05-12 13:08:25,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713670115] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:25,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:25,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:08:25,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876143598] [2024-05-12 13:08:25,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:25,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:08:25,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:25,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:08:25,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:08:25,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:08:25,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 278 transitions, 2689 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:25,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:25,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:08:25,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:27,301 INFO L124 PetriNetUnfolderBase]: 5332/8846 cut-off events. [2024-05-12 13:08:27,301 INFO L125 PetriNetUnfolderBase]: For 387799/387801 co-relation queries the response was YES. [2024-05-12 13:08:27,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57468 conditions, 8846 events. 5332/8846 cut-off events. For 387799/387801 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 60103 event pairs, 1587 based on Foata normal form. 1/8605 useless extension candidates. Maximal degree in co-relation 57375. Up to 7465 conditions per place. [2024-05-12 13:08:27,388 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 260 selfloop transitions, 18 changer transitions 0/307 dead transitions. [2024-05-12 13:08:27,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 307 transitions, 3369 flow [2024-05-12 13:08:27,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:08:27,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:08:27,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-05-12 13:08:27,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-05-12 13:08:27,389 INFO L175 Difference]: Start difference. First operand has 197 places, 278 transitions, 2689 flow. Second operand 8 states and 190 transitions. [2024-05-12 13:08:27,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 307 transitions, 3369 flow [2024-05-12 13:08:27,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 307 transitions, 3257 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-05-12 13:08:27,879 INFO L231 Difference]: Finished difference. Result has 202 places, 278 transitions, 2619 flow [2024-05-12 13:08:27,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2577, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2619, PETRI_PLACES=202, PETRI_TRANSITIONS=278} [2024-05-12 13:08:27,880 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 146 predicate places. [2024-05-12 13:08:27,880 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 278 transitions, 2619 flow [2024-05-12 13:08:27,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:27,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:27,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:08:27,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-05-12 13:08:27,881 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:08:27,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:27,881 INFO L85 PathProgramCache]: Analyzing trace with hash 2058636689, now seen corresponding path program 1 times [2024-05-12 13:08:27,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:27,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837547426] [2024-05-12 13:08:27,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:27,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:27,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:28,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:08:28,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:28,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837547426] [2024-05-12 13:08:28,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837547426] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:28,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:28,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:08:28,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469658038] [2024-05-12 13:08:28,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:28,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:08:28,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:28,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:08:28,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:08:28,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:08:28,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 278 transitions, 2619 flow. Second operand has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:28,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:28,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:08:28,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:30,690 INFO L124 PetriNetUnfolderBase]: 5905/9499 cut-off events. [2024-05-12 13:08:30,690 INFO L125 PetriNetUnfolderBase]: For 439738/439749 co-relation queries the response was YES. [2024-05-12 13:08:30,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62377 conditions, 9499 events. 5905/9499 cut-off events. For 439738/439749 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 62236 event pairs, 1086 based on Foata normal form. 18/9310 useless extension candidates. Maximal degree in co-relation 62282. Up to 6285 conditions per place. [2024-05-12 13:08:30,786 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 239 selfloop transitions, 99 changer transitions 0/348 dead transitions. [2024-05-12 13:08:30,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 348 transitions, 3817 flow [2024-05-12 13:08:30,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:08:30,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:08:30,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-05-12 13:08:30,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5422222222222223 [2024-05-12 13:08:30,787 INFO L175 Difference]: Start difference. First operand has 202 places, 278 transitions, 2619 flow. Second operand 9 states and 244 transitions. [2024-05-12 13:08:30,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 348 transitions, 3817 flow [2024-05-12 13:08:31,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 348 transitions, 3723 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-05-12 13:08:31,231 INFO L231 Difference]: Finished difference. Result has 203 places, 280 transitions, 2779 flow [2024-05-12 13:08:31,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2525, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2779, PETRI_PLACES=203, PETRI_TRANSITIONS=280} [2024-05-12 13:08:31,232 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 147 predicate places. [2024-05-12 13:08:31,232 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 280 transitions, 2779 flow [2024-05-12 13:08:31,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:31,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:31,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:08:31,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-05-12 13:08:31,233 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:08:31,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:31,233 INFO L85 PathProgramCache]: Analyzing trace with hash -404894755, now seen corresponding path program 2 times [2024-05-12 13:08:31,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:31,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749283561] [2024-05-12 13:08:31,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:31,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:31,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:32,228 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 13:08:32,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:32,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749283561] [2024-05-12 13:08:32,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749283561] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:32,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:32,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:08:32,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852971207] [2024-05-12 13:08:32,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:32,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:08:32,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:32,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:08:32,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:08:32,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:08:32,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 280 transitions, 2779 flow. Second operand has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:32,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:32,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:08:32,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:34,276 INFO L124 PetriNetUnfolderBase]: 6109/9803 cut-off events. [2024-05-12 13:08:34,276 INFO L125 PetriNetUnfolderBase]: For 466096/466107 co-relation queries the response was YES. [2024-05-12 13:08:34,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65408 conditions, 9803 events. 6109/9803 cut-off events. For 466096/466107 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 64749 event pairs, 1606 based on Foata normal form. 26/9620 useless extension candidates. Maximal degree in co-relation 65313. Up to 7597 conditions per place. [2024-05-12 13:08:34,377 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 227 selfloop transitions, 107 changer transitions 0/344 dead transitions. [2024-05-12 13:08:34,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 344 transitions, 3756 flow [2024-05-12 13:08:34,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:08:34,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:08:34,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 241 transitions. [2024-05-12 13:08:34,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5355555555555556 [2024-05-12 13:08:34,379 INFO L175 Difference]: Start difference. First operand has 203 places, 280 transitions, 2779 flow. Second operand 9 states and 241 transitions. [2024-05-12 13:08:34,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 344 transitions, 3756 flow [2024-05-12 13:08:34,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 344 transitions, 3639 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-05-12 13:08:34,908 INFO L231 Difference]: Finished difference. Result has 207 places, 282 transitions, 2938 flow [2024-05-12 13:08:34,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2662, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2938, PETRI_PLACES=207, PETRI_TRANSITIONS=282} [2024-05-12 13:08:34,908 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 151 predicate places. [2024-05-12 13:08:34,908 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 282 transitions, 2938 flow [2024-05-12 13:08:34,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:34,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:34,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:08:34,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-05-12 13:08:34,909 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:08:34,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:34,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1239253575, now seen corresponding path program 3 times [2024-05-12 13:08:34,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:34,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31016153] [2024-05-12 13:08:34,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:34,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:34,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:35,906 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 13:08:35,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:35,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31016153] [2024-05-12 13:08:35,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31016153] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:35,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:35,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:08:35,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295742295] [2024-05-12 13:08:35,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:35,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:08:35,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:35,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:08:35,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:08:36,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:08:36,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 282 transitions, 2938 flow. Second operand has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:36,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:36,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:08:36,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:37,957 INFO L124 PetriNetUnfolderBase]: 6239/10017 cut-off events. [2024-05-12 13:08:37,957 INFO L125 PetriNetUnfolderBase]: For 478639/478650 co-relation queries the response was YES. [2024-05-12 13:08:38,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67722 conditions, 10017 events. 6239/10017 cut-off events. For 478639/478650 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 66437 event pairs, 1610 based on Foata normal form. 18/9828 useless extension candidates. Maximal degree in co-relation 67625. Up to 7593 conditions per place. [2024-05-12 13:08:38,078 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 230 selfloop transitions, 109 changer transitions 0/349 dead transitions. [2024-05-12 13:08:38,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 349 transitions, 3917 flow [2024-05-12 13:08:38,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:08:38,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:08:38,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-05-12 13:08:38,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5422222222222223 [2024-05-12 13:08:38,079 INFO L175 Difference]: Start difference. First operand has 207 places, 282 transitions, 2938 flow. Second operand 9 states and 244 transitions. [2024-05-12 13:08:38,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 349 transitions, 3917 flow [2024-05-12 13:08:38,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 349 transitions, 3671 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-05-12 13:08:38,722 INFO L231 Difference]: Finished difference. Result has 209 places, 283 transitions, 2946 flow [2024-05-12 13:08:38,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2692, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2946, PETRI_PLACES=209, PETRI_TRANSITIONS=283} [2024-05-12 13:08:38,722 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 153 predicate places. [2024-05-12 13:08:38,723 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 283 transitions, 2946 flow [2024-05-12 13:08:38,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:38,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:38,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:08:38,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-05-12 13:08:38,723 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:08:38,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:38,724 INFO L85 PathProgramCache]: Analyzing trace with hash 264660043, now seen corresponding path program 4 times [2024-05-12 13:08:38,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:38,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788237957] [2024-05-12 13:08:38,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:38,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:39,715 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 13:08:39,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:39,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788237957] [2024-05-12 13:08:39,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788237957] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:39,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:39,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:08:39,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301086566] [2024-05-12 13:08:39,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:39,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:08:39,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:39,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:08:39,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:08:39,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:08:39,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 283 transitions, 2946 flow. Second operand has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:39,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:39,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:08:39,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:41,685 INFO L124 PetriNetUnfolderBase]: 6369/10229 cut-off events. [2024-05-12 13:08:41,686 INFO L125 PetriNetUnfolderBase]: For 493921/493932 co-relation queries the response was YES. [2024-05-12 13:08:41,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68709 conditions, 10229 events. 6369/10229 cut-off events. For 493921/493932 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 68071 event pairs, 1633 based on Foata normal form. 18/10042 useless extension candidates. Maximal degree in co-relation 68611. Up to 7530 conditions per place. [2024-05-12 13:08:41,807 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 235 selfloop transitions, 107 changer transitions 0/352 dead transitions. [2024-05-12 13:08:41,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 352 transitions, 3949 flow [2024-05-12 13:08:41,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:08:41,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:08:41,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 245 transitions. [2024-05-12 13:08:41,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444444444444444 [2024-05-12 13:08:41,808 INFO L175 Difference]: Start difference. First operand has 209 places, 283 transitions, 2946 flow. Second operand 9 states and 245 transitions. [2024-05-12 13:08:41,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 352 transitions, 3949 flow [2024-05-12 13:08:42,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 352 transitions, 3713 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-05-12 13:08:42,468 INFO L231 Difference]: Finished difference. Result has 211 places, 284 transitions, 2962 flow [2024-05-12 13:08:42,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2710, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2962, PETRI_PLACES=211, PETRI_TRANSITIONS=284} [2024-05-12 13:08:42,468 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 155 predicate places. [2024-05-12 13:08:42,468 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 284 transitions, 2962 flow [2024-05-12 13:08:42,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:42,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:42,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:08:42,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-05-12 13:08:42,469 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:08:42,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:42,469 INFO L85 PathProgramCache]: Analyzing trace with hash 8009527, now seen corresponding path program 1 times [2024-05-12 13:08:42,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:42,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269635429] [2024-05-12 13:08:42,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:42,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:42,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:43,521 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 13:08:43,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:43,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269635429] [2024-05-12 13:08:43,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269635429] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:43,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:43,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:08:43,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433130229] [2024-05-12 13:08:43,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:43,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:08:43,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:43,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:08:43,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:08:43,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:08:43,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 284 transitions, 2962 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:43,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:43,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:08:43,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:45,268 INFO L124 PetriNetUnfolderBase]: 6069/9916 cut-off events. [2024-05-12 13:08:45,268 INFO L125 PetriNetUnfolderBase]: For 488069/488100 co-relation queries the response was YES. [2024-05-12 13:08:45,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66954 conditions, 9916 events. 6069/9916 cut-off events. For 488069/488100 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 67699 event pairs, 1839 based on Foata normal form. 30/9721 useless extension candidates. Maximal degree in co-relation 66855. Up to 8401 conditions per place. [2024-05-12 13:08:45,606 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 250 selfloop transitions, 47 changer transitions 0/326 dead transitions. [2024-05-12 13:08:45,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 326 transitions, 3772 flow [2024-05-12 13:08:45,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:08:45,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:08:45,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-05-12 13:08:45,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515 [2024-05-12 13:08:45,607 INFO L175 Difference]: Start difference. First operand has 211 places, 284 transitions, 2962 flow. Second operand 8 states and 206 transitions. [2024-05-12 13:08:45,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 326 transitions, 3772 flow [2024-05-12 13:08:46,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 326 transitions, 3538 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-05-12 13:08:46,182 INFO L231 Difference]: Finished difference. Result has 212 places, 288 transitions, 2911 flow [2024-05-12 13:08:46,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2728, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2911, PETRI_PLACES=212, PETRI_TRANSITIONS=288} [2024-05-12 13:08:46,182 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 156 predicate places. [2024-05-12 13:08:46,182 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 288 transitions, 2911 flow [2024-05-12 13:08:46,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:46,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:46,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:08:46,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-05-12 13:08:46,183 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:08:46,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:46,184 INFO L85 PathProgramCache]: Analyzing trace with hash 360334279, now seen corresponding path program 5 times [2024-05-12 13:08:46,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:46,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511036443] [2024-05-12 13:08:46,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:46,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:46,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:47,221 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 13:08:47,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:47,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511036443] [2024-05-12 13:08:47,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511036443] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:47,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:47,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:08:47,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103528148] [2024-05-12 13:08:47,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:47,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:08:47,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:47,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:08:47,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:08:47,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:08:47,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 288 transitions, 2911 flow. Second operand has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:47,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:47,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:08:47,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:49,501 INFO L124 PetriNetUnfolderBase]: 6646/10683 cut-off events. [2024-05-12 13:08:49,502 INFO L125 PetriNetUnfolderBase]: For 541380/541403 co-relation queries the response was YES. [2024-05-12 13:08:49,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72098 conditions, 10683 events. 6646/10683 cut-off events. For 541380/541403 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 71772 event pairs, 1377 based on Foata normal form. 32/10516 useless extension candidates. Maximal degree in co-relation 71998. Up to 7811 conditions per place. [2024-05-12 13:08:49,634 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 239 selfloop transitions, 113 changer transitions 0/362 dead transitions. [2024-05-12 13:08:49,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 362 transitions, 4175 flow [2024-05-12 13:08:49,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:08:49,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:08:49,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 250 transitions. [2024-05-12 13:08:49,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-05-12 13:08:49,635 INFO L175 Difference]: Start difference. First operand has 212 places, 288 transitions, 2911 flow. Second operand 9 states and 250 transitions. [2024-05-12 13:08:49,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 362 transitions, 4175 flow [2024-05-12 13:08:50,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 362 transitions, 4020 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-05-12 13:08:50,442 INFO L231 Difference]: Finished difference. Result has 215 places, 290 transitions, 3054 flow [2024-05-12 13:08:50,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2756, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3054, PETRI_PLACES=215, PETRI_TRANSITIONS=290} [2024-05-12 13:08:50,443 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 159 predicate places. [2024-05-12 13:08:50,443 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 290 transitions, 3054 flow [2024-05-12 13:08:50,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:50,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:50,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:08:50,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-05-12 13:08:50,444 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:08:50,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:50,444 INFO L85 PathProgramCache]: Analyzing trace with hash -2046201089, now seen corresponding path program 6 times [2024-05-12 13:08:50,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:50,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795163592] [2024-05-12 13:08:50,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:50,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:50,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:51,489 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 13:08:51,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:51,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795163592] [2024-05-12 13:08:51,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795163592] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:51,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:51,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:08:51,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653407301] [2024-05-12 13:08:51,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:51,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:08:51,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:51,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:08:51,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:08:51,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:08:51,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 290 transitions, 3054 flow. Second operand has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:51,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:51,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:08:51,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:53,832 INFO L124 PetriNetUnfolderBase]: 6813/11036 cut-off events. [2024-05-12 13:08:53,832 INFO L125 PetriNetUnfolderBase]: For 572135/572146 co-relation queries the response was YES. [2024-05-12 13:08:53,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74794 conditions, 11036 events. 6813/11036 cut-off events. For 572135/572146 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 75445 event pairs, 1884 based on Foata normal form. 22/10830 useless extension candidates. Maximal degree in co-relation 74693. Up to 8719 conditions per place. [2024-05-12 13:08:53,963 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 239 selfloop transitions, 104 changer transitions 0/353 dead transitions. [2024-05-12 13:08:53,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 353 transitions, 4038 flow [2024-05-12 13:08:53,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:08:53,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:08:53,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-05-12 13:08:53,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5377777777777778 [2024-05-12 13:08:53,964 INFO L175 Difference]: Start difference. First operand has 215 places, 290 transitions, 3054 flow. Second operand 9 states and 242 transitions. [2024-05-12 13:08:53,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 353 transitions, 4038 flow [2024-05-12 13:08:54,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 353 transitions, 3880 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-05-12 13:08:54,727 INFO L231 Difference]: Finished difference. Result has 219 places, 291 transitions, 3147 flow [2024-05-12 13:08:54,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2896, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3147, PETRI_PLACES=219, PETRI_TRANSITIONS=291} [2024-05-12 13:08:54,728 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 163 predicate places. [2024-05-12 13:08:54,728 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 291 transitions, 3147 flow [2024-05-12 13:08:54,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:54,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:54,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:08:54,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-05-12 13:08:54,729 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:08:54,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:54,730 INFO L85 PathProgramCache]: Analyzing trace with hash -194309623, now seen corresponding path program 7 times [2024-05-12 13:08:54,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:54,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837739805] [2024-05-12 13:08:54,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:54,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:54,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:55,696 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 13:08:55,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:55,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837739805] [2024-05-12 13:08:55,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837739805] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:55,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:55,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:08:55,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782891138] [2024-05-12 13:08:55,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:55,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:08:55,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:55,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:08:55,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:08:55,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:08:55,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 291 transitions, 3147 flow. Second operand has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:55,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:55,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:08:55,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:58,230 INFO L124 PetriNetUnfolderBase]: 7146/11561 cut-off events. [2024-05-12 13:08:58,230 INFO L125 PetriNetUnfolderBase]: For 620927/620938 co-relation queries the response was YES. [2024-05-12 13:08:58,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79732 conditions, 11561 events. 7146/11561 cut-off events. For 620927/620938 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 79455 event pairs, 1918 based on Foata normal form. 18/11353 useless extension candidates. Maximal degree in co-relation 79629. Up to 8758 conditions per place. [2024-05-12 13:08:58,362 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 243 selfloop transitions, 107 changer transitions 0/360 dead transitions. [2024-05-12 13:08:58,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 360 transitions, 4401 flow [2024-05-12 13:08:58,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:08:58,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:08:58,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 246 transitions. [2024-05-12 13:08:58,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5466666666666666 [2024-05-12 13:08:58,363 INFO L175 Difference]: Start difference. First operand has 219 places, 291 transitions, 3147 flow. Second operand 9 states and 246 transitions. [2024-05-12 13:08:58,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 360 transitions, 4401 flow [2024-05-12 13:08:59,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 360 transitions, 4176 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-05-12 13:08:59,081 INFO L231 Difference]: Finished difference. Result has 221 places, 293 transitions, 3216 flow [2024-05-12 13:08:59,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2922, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3216, PETRI_PLACES=221, PETRI_TRANSITIONS=293} [2024-05-12 13:08:59,082 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 165 predicate places. [2024-05-12 13:08:59,082 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 293 transitions, 3216 flow [2024-05-12 13:08:59,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:59,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:59,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:08:59,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-05-12 13:08:59,083 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:08:59,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:59,083 INFO L85 PathProgramCache]: Analyzing trace with hash -360543403, now seen corresponding path program 8 times [2024-05-12 13:08:59,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:59,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681336189] [2024-05-12 13:08:59,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:59,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:59,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:00,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:09:00,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:00,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681336189] [2024-05-12 13:09:00,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681336189] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:00,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:00,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:09:00,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086486533] [2024-05-12 13:09:00,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:00,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:09:00,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:00,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:09:00,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:09:00,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:09:00,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 293 transitions, 3216 flow. Second operand has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:00,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:00,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:09:00,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:02,584 INFO L124 PetriNetUnfolderBase]: 7479/12136 cut-off events. [2024-05-12 13:09:02,584 INFO L125 PetriNetUnfolderBase]: For 679646/679669 co-relation queries the response was YES. [2024-05-12 13:09:02,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84375 conditions, 12136 events. 7479/12136 cut-off events. For 679646/679669 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 84340 event pairs, 1975 based on Foata normal form. 32/11931 useless extension candidates. Maximal degree in co-relation 84271. Up to 9497 conditions per place. [2024-05-12 13:09:02,720 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 246 selfloop transitions, 111 changer transitions 0/367 dead transitions. [2024-05-12 13:09:02,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 367 transitions, 4516 flow [2024-05-12 13:09:02,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:09:02,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:09:02,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 250 transitions. [2024-05-12 13:09:02,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-05-12 13:09:02,722 INFO L175 Difference]: Start difference. First operand has 221 places, 293 transitions, 3216 flow. Second operand 9 states and 250 transitions. [2024-05-12 13:09:02,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 367 transitions, 4516 flow [2024-05-12 13:09:03,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 367 transitions, 4359 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-05-12 13:09:03,486 INFO L231 Difference]: Finished difference. Result has 225 places, 295 transitions, 3365 flow [2024-05-12 13:09:03,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3059, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3365, PETRI_PLACES=225, PETRI_TRANSITIONS=295} [2024-05-12 13:09:03,487 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 169 predicate places. [2024-05-12 13:09:03,487 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 295 transitions, 3365 flow [2024-05-12 13:09:03,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:03,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:03,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:03,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-05-12 13:09:03,488 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:03,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:03,488 INFO L85 PathProgramCache]: Analyzing trace with hash -187875883, now seen corresponding path program 9 times [2024-05-12 13:09:03,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:03,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454737451] [2024-05-12 13:09:03,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:03,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:03,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:04,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:09:04,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:04,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454737451] [2024-05-12 13:09:04,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454737451] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:04,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:04,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:09:04,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952040568] [2024-05-12 13:09:04,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:04,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:09:04,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:04,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:09:04,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:09:04,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:09:04,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 295 transitions, 3365 flow. Second operand has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:04,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:04,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:09:04,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:07,093 INFO L124 PetriNetUnfolderBase]: 7443/12098 cut-off events. [2024-05-12 13:09:07,093 INFO L125 PetriNetUnfolderBase]: For 668669/668680 co-relation queries the response was YES. [2024-05-12 13:09:07,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83564 conditions, 12098 events. 7443/12098 cut-off events. For 668669/668680 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 84341 event pairs, 2030 based on Foata normal form. 22/11875 useless extension candidates. Maximal degree in co-relation 83458. Up to 9693 conditions per place. [2024-05-12 13:09:07,239 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 241 selfloop transitions, 105 changer transitions 0/356 dead transitions. [2024-05-12 13:09:07,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 356 transitions, 4317 flow [2024-05-12 13:09:07,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:09:07,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:09:07,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-05-12 13:09:07,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-05-12 13:09:07,241 INFO L175 Difference]: Start difference. First operand has 225 places, 295 transitions, 3365 flow. Second operand 9 states and 240 transitions. [2024-05-12 13:09:07,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 356 transitions, 4317 flow [2024-05-12 13:09:08,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 356 transitions, 4130 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-05-12 13:09:08,137 INFO L231 Difference]: Finished difference. Result has 229 places, 295 transitions, 3395 flow [2024-05-12 13:09:08,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3178, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3395, PETRI_PLACES=229, PETRI_TRANSITIONS=295} [2024-05-12 13:09:08,138 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 173 predicate places. [2024-05-12 13:09:08,138 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 295 transitions, 3395 flow [2024-05-12 13:09:08,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:08,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:08,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:08,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-05-12 13:09:08,139 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:08,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:08,139 INFO L85 PathProgramCache]: Analyzing trace with hash -360538753, now seen corresponding path program 10 times [2024-05-12 13:09:08,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:08,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045253251] [2024-05-12 13:09:08,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:08,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:08,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:09,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:09:09,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:09,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045253251] [2024-05-12 13:09:09,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045253251] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:09,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:09,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:09:09,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670481461] [2024-05-12 13:09:09,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:09,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:09:09,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:09,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:09:09,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:09:09,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:09:09,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 295 transitions, 3395 flow. Second operand has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:09,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:09,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:09:09,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:11,718 INFO L124 PetriNetUnfolderBase]: 7407/12059 cut-off events. [2024-05-12 13:09:11,719 INFO L125 PetriNetUnfolderBase]: For 639928/639951 co-relation queries the response was YES. [2024-05-12 13:09:11,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81875 conditions, 12059 events. 7407/12059 cut-off events. For 639928/639951 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 84146 event pairs, 1990 based on Foata normal form. 36/11848 useless extension candidates. Maximal degree in co-relation 81767. Up to 9637 conditions per place. [2024-05-12 13:09:11,859 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 242 selfloop transitions, 109 changer transitions 0/361 dead transitions. [2024-05-12 13:09:11,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 361 transitions, 4381 flow [2024-05-12 13:09:11,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:09:11,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:09:11,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-05-12 13:09:11,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5422222222222223 [2024-05-12 13:09:11,860 INFO L175 Difference]: Start difference. First operand has 229 places, 295 transitions, 3395 flow. Second operand 9 states and 244 transitions. [2024-05-12 13:09:11,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 361 transitions, 4381 flow [2024-05-12 13:09:12,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 361 transitions, 4143 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-05-12 13:09:12,526 INFO L231 Difference]: Finished difference. Result has 230 places, 295 transitions, 3382 flow [2024-05-12 13:09:12,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3157, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3382, PETRI_PLACES=230, PETRI_TRANSITIONS=295} [2024-05-12 13:09:12,527 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 174 predicate places. [2024-05-12 13:09:12,527 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 295 transitions, 3382 flow [2024-05-12 13:09:12,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:12,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:12,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:12,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-05-12 13:09:12,528 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:12,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:12,528 INFO L85 PathProgramCache]: Analyzing trace with hash 191398141, now seen corresponding path program 1 times [2024-05-12 13:09:12,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:12,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149282416] [2024-05-12 13:09:12,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:12,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:12,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:13,330 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 13:09:13,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:13,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149282416] [2024-05-12 13:09:13,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149282416] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:13,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:13,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:09:13,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77606327] [2024-05-12 13:09:13,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:13,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:09:13,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:13,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:09:13,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:09:13,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:09:13,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 295 transitions, 3382 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:13,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:13,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:09:13,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:15,565 INFO L124 PetriNetUnfolderBase]: 7071/11649 cut-off events. [2024-05-12 13:09:15,565 INFO L125 PetriNetUnfolderBase]: For 619880/619899 co-relation queries the response was YES. [2024-05-12 13:09:15,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79519 conditions, 11649 events. 7071/11649 cut-off events. For 619880/619899 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 82654 event pairs, 2169 based on Foata normal form. 16/11360 useless extension candidates. Maximal degree in co-relation 79410. Up to 9955 conditions per place. [2024-05-12 13:09:15,710 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 257 selfloop transitions, 44 changer transitions 0/330 dead transitions. [2024-05-12 13:09:15,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 330 transitions, 4150 flow [2024-05-12 13:09:15,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:09:15,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:09:15,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-05-12 13:09:15,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-05-12 13:09:15,711 INFO L175 Difference]: Start difference. First operand has 230 places, 295 transitions, 3382 flow. Second operand 7 states and 180 transitions. [2024-05-12 13:09:15,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 330 transitions, 4150 flow [2024-05-12 13:09:16,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 330 transitions, 3927 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-05-12 13:09:16,399 INFO L231 Difference]: Finished difference. Result has 229 places, 300 transitions, 3324 flow [2024-05-12 13:09:16,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3159, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3324, PETRI_PLACES=229, PETRI_TRANSITIONS=300} [2024-05-12 13:09:16,400 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 173 predicate places. [2024-05-12 13:09:16,400 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 300 transitions, 3324 flow [2024-05-12 13:09:16,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:16,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:16,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:16,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-05-12 13:09:16,400 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:16,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:16,400 INFO L85 PathProgramCache]: Analyzing trace with hash 684741949, now seen corresponding path program 2 times [2024-05-12 13:09:16,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:16,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249926538] [2024-05-12 13:09:16,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:16,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:16,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:17,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:09:17,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:17,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249926538] [2024-05-12 13:09:17,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249926538] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:17,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:17,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:09:17,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169814782] [2024-05-12 13:09:17,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:17,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:09:17,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:17,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:09:17,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:09:17,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:09:17,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 300 transitions, 3324 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:17,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:17,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:09:17,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:19,527 INFO L124 PetriNetUnfolderBase]: 7085/11667 cut-off events. [2024-05-12 13:09:19,527 INFO L125 PetriNetUnfolderBase]: For 630781/630800 co-relation queries the response was YES. [2024-05-12 13:09:19,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79223 conditions, 11667 events. 7085/11667 cut-off events. For 630781/630800 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 82687 event pairs, 2174 based on Foata normal form. 16/11379 useless extension candidates. Maximal degree in co-relation 79113. Up to 9858 conditions per place. [2024-05-12 13:09:19,651 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 249 selfloop transitions, 53 changer transitions 0/331 dead transitions. [2024-05-12 13:09:19,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 331 transitions, 4214 flow [2024-05-12 13:09:19,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:09:19,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:09:19,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-05-12 13:09:19,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-05-12 13:09:19,652 INFO L175 Difference]: Start difference. First operand has 229 places, 300 transitions, 3324 flow. Second operand 7 states and 180 transitions. [2024-05-12 13:09:19,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 331 transitions, 4214 flow [2024-05-12 13:09:20,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 331 transitions, 4138 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-05-12 13:09:20,228 INFO L231 Difference]: Finished difference. Result has 233 places, 303 transitions, 3417 flow [2024-05-12 13:09:20,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3248, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3417, PETRI_PLACES=233, PETRI_TRANSITIONS=303} [2024-05-12 13:09:20,229 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 177 predicate places. [2024-05-12 13:09:20,229 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 303 transitions, 3417 flow [2024-05-12 13:09:20,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:20,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:20,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:20,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-05-12 13:09:20,229 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:20,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:20,230 INFO L85 PathProgramCache]: Analyzing trace with hash 692176555, now seen corresponding path program 2 times [2024-05-12 13:09:20,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:20,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754714524] [2024-05-12 13:09:20,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:20,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:20,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:21,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:09:21,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:21,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754714524] [2024-05-12 13:09:21,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754714524] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:21,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:21,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:09:21,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858108203] [2024-05-12 13:09:21,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:21,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:09:21,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:21,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:09:21,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:09:21,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:09:21,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 303 transitions, 3417 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:21,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:21,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:09:21,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:23,507 INFO L124 PetriNetUnfolderBase]: 7121/11724 cut-off events. [2024-05-12 13:09:23,507 INFO L125 PetriNetUnfolderBase]: For 648579/648598 co-relation queries the response was YES. [2024-05-12 13:09:23,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79925 conditions, 11724 events. 7121/11724 cut-off events. For 648579/648598 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 83156 event pairs, 2174 based on Foata normal form. 16/11436 useless extension candidates. Maximal degree in co-relation 79814. Up to 9884 conditions per place. [2024-05-12 13:09:23,662 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 253 selfloop transitions, 58 changer transitions 0/340 dead transitions. [2024-05-12 13:09:23,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 340 transitions, 4381 flow [2024-05-12 13:09:23,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:09:23,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:09:23,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-05-12 13:09:23,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075 [2024-05-12 13:09:23,663 INFO L175 Difference]: Start difference. First operand has 233 places, 303 transitions, 3417 flow. Second operand 8 states and 203 transitions. [2024-05-12 13:09:23,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 340 transitions, 4381 flow [2024-05-12 13:09:24,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 340 transitions, 4267 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-05-12 13:09:24,580 INFO L231 Difference]: Finished difference. Result has 237 places, 307 transitions, 3516 flow [2024-05-12 13:09:24,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3303, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3516, PETRI_PLACES=237, PETRI_TRANSITIONS=307} [2024-05-12 13:09:24,580 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 181 predicate places. [2024-05-12 13:09:24,581 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 307 transitions, 3516 flow [2024-05-12 13:09:24,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:24,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:24,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:24,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-05-12 13:09:24,581 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:24,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:24,581 INFO L85 PathProgramCache]: Analyzing trace with hash 692190505, now seen corresponding path program 3 times [2024-05-12 13:09:24,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:24,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538554879] [2024-05-12 13:09:24,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:24,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:24,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:25,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:09:25,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:25,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538554879] [2024-05-12 13:09:25,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538554879] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:25,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:25,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:09:25,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105551070] [2024-05-12 13:09:25,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:25,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:09:25,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:25,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:09:25,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:09:26,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:09:26,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 307 transitions, 3516 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:26,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:26,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:09:26,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:28,127 INFO L124 PetriNetUnfolderBase]: 7197/11824 cut-off events. [2024-05-12 13:09:28,127 INFO L125 PetriNetUnfolderBase]: For 674692/674711 co-relation queries the response was YES. [2024-05-12 13:09:28,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82229 conditions, 11824 events. 7197/11824 cut-off events. For 674692/674711 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 83746 event pairs, 2171 based on Foata normal form. 16/11539 useless extension candidates. Maximal degree in co-relation 82117. Up to 9864 conditions per place. [2024-05-12 13:09:28,322 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 255 selfloop transitions, 65 changer transitions 0/349 dead transitions. [2024-05-12 13:09:28,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 349 transitions, 4726 flow [2024-05-12 13:09:28,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:09:28,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:09:28,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-05-12 13:09:28,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-05-12 13:09:28,324 INFO L175 Difference]: Start difference. First operand has 237 places, 307 transitions, 3516 flow. Second operand 8 states and 205 transitions. [2024-05-12 13:09:28,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 349 transitions, 4726 flow [2024-05-12 13:09:29,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 349 transitions, 4541 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-05-12 13:09:29,454 INFO L231 Difference]: Finished difference. Result has 240 places, 315 transitions, 3668 flow [2024-05-12 13:09:29,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3331, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3668, PETRI_PLACES=240, PETRI_TRANSITIONS=315} [2024-05-12 13:09:29,454 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 184 predicate places. [2024-05-12 13:09:29,455 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 315 transitions, 3668 flow [2024-05-12 13:09:29,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:29,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:29,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:29,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-05-12 13:09:29,455 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:29,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:29,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1711413075, now seen corresponding path program 1 times [2024-05-12 13:09:29,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:29,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434809937] [2024-05-12 13:09:29,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:29,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:29,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:30,718 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 13:09:30,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:30,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434809937] [2024-05-12 13:09:30,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434809937] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:30,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:30,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:09:30,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172605597] [2024-05-12 13:09:30,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:30,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:09:30,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:30,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:09:30,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:09:30,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:09:30,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 315 transitions, 3668 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:30,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:30,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:09:30,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:32,935 INFO L124 PetriNetUnfolderBase]: 7276/12045 cut-off events. [2024-05-12 13:09:32,935 INFO L125 PetriNetUnfolderBase]: For 709357/709369 co-relation queries the response was YES. [2024-05-12 13:09:33,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84751 conditions, 12045 events. 7276/12045 cut-off events. For 709357/709369 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 86406 event pairs, 2813 based on Foata normal form. 14/11736 useless extension candidates. Maximal degree in co-relation 84637. Up to 10388 conditions per place. [2024-05-12 13:09:33,107 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 307 selfloop transitions, 28 changer transitions 0/364 dead transitions. [2024-05-12 13:09:33,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 364 transitions, 4703 flow [2024-05-12 13:09:33,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:09:33,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:09:33,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-05-12 13:09:33,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4688888888888889 [2024-05-12 13:09:33,108 INFO L175 Difference]: Start difference. First operand has 240 places, 315 transitions, 3668 flow. Second operand 9 states and 211 transitions. [2024-05-12 13:09:33,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 364 transitions, 4703 flow [2024-05-12 13:09:34,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 364 transitions, 4534 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-05-12 13:09:34,299 INFO L231 Difference]: Finished difference. Result has 249 places, 332 transitions, 3843 flow [2024-05-12 13:09:34,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3505, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3843, PETRI_PLACES=249, PETRI_TRANSITIONS=332} [2024-05-12 13:09:34,300 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 193 predicate places. [2024-05-12 13:09:34,300 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 332 transitions, 3843 flow [2024-05-12 13:09:34,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:34,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:34,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:34,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-05-12 13:09:34,301 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:34,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:34,301 INFO L85 PathProgramCache]: Analyzing trace with hash -186043397, now seen corresponding path program 2 times [2024-05-12 13:09:34,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:34,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279671454] [2024-05-12 13:09:34,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:34,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:34,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:35,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:09:35,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:35,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279671454] [2024-05-12 13:09:35,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279671454] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:35,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:35,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:09:35,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733956767] [2024-05-12 13:09:35,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:35,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:09:35,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:35,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:09:35,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:09:35,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:09:35,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 332 transitions, 3843 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:35,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:35,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:09:35,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:37,834 INFO L124 PetriNetUnfolderBase]: 7354/12132 cut-off events. [2024-05-12 13:09:37,834 INFO L125 PetriNetUnfolderBase]: For 721743/721755 co-relation queries the response was YES. [2024-05-12 13:09:37,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86370 conditions, 12132 events. 7354/12132 cut-off events. For 721743/721755 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 86417 event pairs, 2923 based on Foata normal form. 13/11829 useless extension candidates. Maximal degree in co-relation 86250. Up to 10464 conditions per place. [2024-05-12 13:09:38,015 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 314 selfloop transitions, 40 changer transitions 0/383 dead transitions. [2024-05-12 13:09:38,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 383 transitions, 4941 flow [2024-05-12 13:09:38,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:09:38,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:09:38,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-05-12 13:09:38,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-05-12 13:09:38,016 INFO L175 Difference]: Start difference. First operand has 249 places, 332 transitions, 3843 flow. Second operand 9 states and 220 transitions. [2024-05-12 13:09:38,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 383 transitions, 4941 flow [2024-05-12 13:09:39,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 383 transitions, 4785 flow, removed 63 selfloop flow, removed 2 redundant places. [2024-05-12 13:09:39,290 INFO L231 Difference]: Finished difference. Result has 259 places, 347 transitions, 4084 flow [2024-05-12 13:09:39,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3755, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4084, PETRI_PLACES=259, PETRI_TRANSITIONS=347} [2024-05-12 13:09:39,290 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 203 predicate places. [2024-05-12 13:09:39,290 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 347 transitions, 4084 flow [2024-05-12 13:09:39,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:39,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:39,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:39,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-05-12 13:09:39,291 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:39,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:39,291 INFO L85 PathProgramCache]: Analyzing trace with hash 2127919209, now seen corresponding path program 11 times [2024-05-12 13:09:39,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:39,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251428052] [2024-05-12 13:09:39,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:39,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:39,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:40,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:09:40,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:40,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251428052] [2024-05-12 13:09:40,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251428052] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:40,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:40,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:09:40,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294471501] [2024-05-12 13:09:40,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:40,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:09:40,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:40,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:09:40,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:09:40,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:09:40,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 347 transitions, 4084 flow. Second operand has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:40,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:40,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:09:40,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:42,989 INFO L124 PetriNetUnfolderBase]: 7884/12818 cut-off events. [2024-05-12 13:09:42,989 INFO L125 PetriNetUnfolderBase]: For 779340/779349 co-relation queries the response was YES. [2024-05-12 13:09:43,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91319 conditions, 12818 events. 7884/12818 cut-off events. For 779340/779349 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 89939 event pairs, 2087 based on Foata normal form. 26/12565 useless extension candidates. Maximal degree in co-relation 91194. Up to 10299 conditions per place. [2024-05-12 13:09:43,198 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 290 selfloop transitions, 105 changer transitions 0/405 dead transitions. [2024-05-12 13:09:43,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 405 transitions, 5154 flow [2024-05-12 13:09:43,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:09:43,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:09:43,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-05-12 13:09:43,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-05-12 13:09:43,200 INFO L175 Difference]: Start difference. First operand has 259 places, 347 transitions, 4084 flow. Second operand 9 states and 234 transitions. [2024-05-12 13:09:43,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 405 transitions, 5154 flow [2024-05-12 13:09:44,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 405 transitions, 5011 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-05-12 13:09:44,602 INFO L231 Difference]: Finished difference. Result has 262 places, 348 transitions, 4200 flow [2024-05-12 13:09:44,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3941, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4200, PETRI_PLACES=262, PETRI_TRANSITIONS=348} [2024-05-12 13:09:44,603 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 206 predicate places. [2024-05-12 13:09:44,603 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 348 transitions, 4200 flow [2024-05-12 13:09:44,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:44,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:44,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:44,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-05-12 13:09:44,604 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:44,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:44,604 INFO L85 PathProgramCache]: Analyzing trace with hash 428914085, now seen corresponding path program 12 times [2024-05-12 13:09:44,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:44,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855945551] [2024-05-12 13:09:44,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:44,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:44,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:45,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:09:45,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:45,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855945551] [2024-05-12 13:09:45,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855945551] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:45,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:45,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:09:45,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322886710] [2024-05-12 13:09:45,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:45,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:09:45,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:45,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:09:45,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:09:45,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:09:45,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 348 transitions, 4200 flow. Second operand has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:45,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:45,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:09:45,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:48,482 INFO L124 PetriNetUnfolderBase]: 8051/13093 cut-off events. [2024-05-12 13:09:48,482 INFO L125 PetriNetUnfolderBase]: For 811293/811302 co-relation queries the response was YES. [2024-05-12 13:09:48,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94225 conditions, 13093 events. 8051/13093 cut-off events. For 811293/811302 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 92220 event pairs, 2114 based on Foata normal form. 26/12836 useless extension candidates. Maximal degree in co-relation 94099. Up to 10556 conditions per place. [2024-05-12 13:09:48,697 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 296 selfloop transitions, 101 changer transitions 0/407 dead transitions. [2024-05-12 13:09:48,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 407 transitions, 5280 flow [2024-05-12 13:09:48,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:09:48,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:09:48,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-05-12 13:09:48,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5266666666666666 [2024-05-12 13:09:48,698 INFO L175 Difference]: Start difference. First operand has 262 places, 348 transitions, 4200 flow. Second operand 9 states and 237 transitions. [2024-05-12 13:09:48,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 407 transitions, 5280 flow [2024-05-12 13:09:50,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 407 transitions, 5047 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-05-12 13:09:50,045 INFO L231 Difference]: Finished difference. Result has 264 places, 349 transitions, 4220 flow [2024-05-12 13:09:50,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3967, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4220, PETRI_PLACES=264, PETRI_TRANSITIONS=349} [2024-05-12 13:09:50,046 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 208 predicate places. [2024-05-12 13:09:50,046 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 349 transitions, 4220 flow [2024-05-12 13:09:50,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:50,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:50,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:50,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-05-12 13:09:50,046 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:50,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:50,047 INFO L85 PathProgramCache]: Analyzing trace with hash 422484995, now seen corresponding path program 13 times [2024-05-12 13:09:50,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:50,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912111436] [2024-05-12 13:09:50,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:50,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:50,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:51,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:09:51,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:51,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912111436] [2024-05-12 13:09:51,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912111436] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:51,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:51,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:09:51,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516146218] [2024-05-12 13:09:51,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:51,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:09:51,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:51,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:09:51,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:09:51,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:09:51,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 349 transitions, 4220 flow. Second operand has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:51,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:51,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:09:51,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:53,926 INFO L124 PetriNetUnfolderBase]: 8173/13323 cut-off events. [2024-05-12 13:09:53,927 INFO L125 PetriNetUnfolderBase]: For 825342/825351 co-relation queries the response was YES. [2024-05-12 13:09:54,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95059 conditions, 13323 events. 8173/13323 cut-off events. For 825342/825351 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 94261 event pairs, 2168 based on Foata normal form. 26/13061 useless extension candidates. Maximal degree in co-relation 94932. Up to 10746 conditions per place. [2024-05-12 13:09:54,132 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 296 selfloop transitions, 102 changer transitions 0/408 dead transitions. [2024-05-12 13:09:54,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 408 transitions, 5304 flow [2024-05-12 13:09:54,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:09:54,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:09:54,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-05-12 13:09:54,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5244444444444445 [2024-05-12 13:09:54,133 INFO L175 Difference]: Start difference. First operand has 264 places, 349 transitions, 4220 flow. Second operand 9 states and 236 transitions. [2024-05-12 13:09:54,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 408 transitions, 5304 flow [2024-05-12 13:09:55,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 408 transitions, 5077 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-05-12 13:09:55,569 INFO L231 Difference]: Finished difference. Result has 266 places, 350 transitions, 4250 flow [2024-05-12 13:09:55,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3993, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4250, PETRI_PLACES=266, PETRI_TRANSITIONS=350} [2024-05-12 13:09:55,569 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 210 predicate places. [2024-05-12 13:09:55,569 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 350 transitions, 4250 flow [2024-05-12 13:09:55,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:55,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:55,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:55,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-05-12 13:09:55,570 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:55,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:55,570 INFO L85 PathProgramCache]: Analyzing trace with hash 422480345, now seen corresponding path program 14 times [2024-05-12 13:09:55,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:55,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588472540] [2024-05-12 13:09:55,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:55,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:55,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:56,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:09:56,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:56,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588472540] [2024-05-12 13:09:56,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588472540] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:56,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:56,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:09:56,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129154283] [2024-05-12 13:09:56,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:56,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:09:56,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:56,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:09:56,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:09:56,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:09:56,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 350 transitions, 4250 flow. Second operand has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:56,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:56,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:09:56,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:59,477 INFO L124 PetriNetUnfolderBase]: 8145/13195 cut-off events. [2024-05-12 13:09:59,477 INFO L125 PetriNetUnfolderBase]: For 795023/795032 co-relation queries the response was YES. [2024-05-12 13:09:59,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93294 conditions, 13195 events. 8145/13195 cut-off events. For 795023/795032 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 92597 event pairs, 2066 based on Foata normal form. 22/12951 useless extension candidates. Maximal degree in co-relation 93166. Up to 10048 conditions per place. [2024-05-12 13:09:59,682 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 295 selfloop transitions, 106 changer transitions 0/411 dead transitions. [2024-05-12 13:09:59,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 411 transitions, 5306 flow [2024-05-12 13:09:59,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:09:59,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:09:59,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-05-12 13:09:59,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5288888888888889 [2024-05-12 13:09:59,684 INFO L175 Difference]: Start difference. First operand has 266 places, 350 transitions, 4250 flow. Second operand 9 states and 238 transitions. [2024-05-12 13:09:59,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 411 transitions, 5306 flow [2024-05-12 13:10:01,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 411 transitions, 5061 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-05-12 13:10:01,009 INFO L231 Difference]: Finished difference. Result has 268 places, 350 transitions, 4223 flow [2024-05-12 13:10:01,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4005, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4223, PETRI_PLACES=268, PETRI_TRANSITIONS=350} [2024-05-12 13:10:01,009 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 212 predicate places. [2024-05-12 13:10:01,009 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 350 transitions, 4223 flow [2024-05-12 13:10:01,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:01,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:01,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:01,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-05-12 13:10:01,010 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:01,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:01,010 INFO L85 PathProgramCache]: Analyzing trace with hash 2142447647, now seen corresponding path program 3 times [2024-05-12 13:10:01,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:01,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438270347] [2024-05-12 13:10:01,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:01,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:01,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:01,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:01,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:01,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438270347] [2024-05-12 13:10:01,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438270347] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:01,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:01,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:10:01,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843151495] [2024-05-12 13:10:01,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:01,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:10:01,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:01,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:10:01,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:10:01,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:10:01,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 350 transitions, 4223 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:01,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:01,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:10:01,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:04,311 INFO L124 PetriNetUnfolderBase]: 7764/12778 cut-off events. [2024-05-12 13:10:04,311 INFO L125 PetriNetUnfolderBase]: For 762593/762601 co-relation queries the response was YES. [2024-05-12 13:10:04,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90121 conditions, 12778 events. 7764/12778 cut-off events. For 762593/762601 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 91621 event pairs, 2336 based on Foata normal form. 9/12431 useless extension candidates. Maximal degree in co-relation 89992. Up to 10961 conditions per place. [2024-05-12 13:10:04,549 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 301 selfloop transitions, 48 changer transitions 0/378 dead transitions. [2024-05-12 13:10:04,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 378 transitions, 5033 flow [2024-05-12 13:10:04,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:10:04,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:10:04,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-05-12 13:10:04,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5057142857142857 [2024-05-12 13:10:04,550 INFO L175 Difference]: Start difference. First operand has 268 places, 350 transitions, 4223 flow. Second operand 7 states and 177 transitions. [2024-05-12 13:10:04,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 378 transitions, 5033 flow [2024-05-12 13:10:05,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 378 transitions, 4594 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-05-12 13:10:05,864 INFO L231 Difference]: Finished difference. Result has 265 places, 350 transitions, 3887 flow [2024-05-12 13:10:05,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3784, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3887, PETRI_PLACES=265, PETRI_TRANSITIONS=350} [2024-05-12 13:10:05,864 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 209 predicate places. [2024-05-12 13:10:05,865 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 350 transitions, 3887 flow [2024-05-12 13:10:05,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:05,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:05,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:05,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-05-12 13:10:05,865 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:05,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:05,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1696294067, now seen corresponding path program 4 times [2024-05-12 13:10:05,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:05,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196118470] [2024-05-12 13:10:05,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:05,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:05,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:06,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:06,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:06,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196118470] [2024-05-12 13:10:06,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196118470] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:06,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:06,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:10:06,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374821082] [2024-05-12 13:10:06,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:06,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:10:06,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:06,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:10:06,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:10:06,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:10:06,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 350 transitions, 3887 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:06,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:06,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:10:06,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:09,123 INFO L124 PetriNetUnfolderBase]: 7781/12801 cut-off events. [2024-05-12 13:10:09,123 INFO L125 PetriNetUnfolderBase]: For 767687/767695 co-relation queries the response was YES. [2024-05-12 13:10:09,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87532 conditions, 12801 events. 7781/12801 cut-off events. For 767687/767695 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 91735 event pairs, 2324 based on Foata normal form. 9/12454 useless extension candidates. Maximal degree in co-relation 87404. Up to 10930 conditions per place. [2024-05-12 13:10:09,318 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 293 selfloop transitions, 57 changer transitions 0/379 dead transitions. [2024-05-12 13:10:09,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 379 transitions, 4741 flow [2024-05-12 13:10:09,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:10:09,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:10:09,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-05-12 13:10:09,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5057142857142857 [2024-05-12 13:10:09,319 INFO L175 Difference]: Start difference. First operand has 265 places, 350 transitions, 3887 flow. Second operand 7 states and 177 transitions. [2024-05-12 13:10:09,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 379 transitions, 4741 flow [2024-05-12 13:10:10,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 379 transitions, 4517 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-05-12 13:10:10,582 INFO L231 Difference]: Finished difference. Result has 264 places, 353 transitions, 3837 flow [2024-05-12 13:10:10,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3663, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3837, PETRI_PLACES=264, PETRI_TRANSITIONS=353} [2024-05-12 13:10:10,583 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 208 predicate places. [2024-05-12 13:10:10,583 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 353 transitions, 3837 flow [2024-05-12 13:10:10,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:10,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:10,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:10,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-05-12 13:10:10,583 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:10,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:10,584 INFO L85 PathProgramCache]: Analyzing trace with hash 654104761, now seen corresponding path program 5 times [2024-05-12 13:10:10,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:10,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704975484] [2024-05-12 13:10:10,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:10,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:10,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:11,525 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 13:10:11,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:11,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704975484] [2024-05-12 13:10:11,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704975484] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:11,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:11,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:10:11,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79012904] [2024-05-12 13:10:11,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:11,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:10:11,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:11,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:10:11,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:10:11,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:10:11,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 353 transitions, 3837 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:11,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:11,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:10:11,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:13,970 INFO L124 PetriNetUnfolderBase]: 7800/13096 cut-off events. [2024-05-12 13:10:13,970 INFO L125 PetriNetUnfolderBase]: For 785081/785098 co-relation queries the response was YES. [2024-05-12 13:10:14,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88110 conditions, 13096 events. 7800/13096 cut-off events. For 785081/785098 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 96206 event pairs, 2292 based on Foata normal form. 15/12675 useless extension candidates. Maximal degree in co-relation 87981. Up to 10713 conditions per place. [2024-05-12 13:10:14,173 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 271 selfloop transitions, 80 changer transitions 0/380 dead transitions. [2024-05-12 13:10:14,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 380 transitions, 4845 flow [2024-05-12 13:10:14,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:10:14,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:10:14,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-05-12 13:10:14,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5057142857142857 [2024-05-12 13:10:14,174 INFO L175 Difference]: Start difference. First operand has 264 places, 353 transitions, 3837 flow. Second operand 7 states and 177 transitions. [2024-05-12 13:10:14,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 380 transitions, 4845 flow [2024-05-12 13:10:15,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 380 transitions, 4703 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-05-12 13:10:15,625 INFO L231 Difference]: Finished difference. Result has 266 places, 356 transitions, 3915 flow [2024-05-12 13:10:15,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3695, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3915, PETRI_PLACES=266, PETRI_TRANSITIONS=356} [2024-05-12 13:10:15,626 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 210 predicate places. [2024-05-12 13:10:15,626 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 356 transitions, 3915 flow [2024-05-12 13:10:15,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:15,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:15,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:15,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-05-12 13:10:15,627 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:15,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:15,627 INFO L85 PathProgramCache]: Analyzing trace with hash 648390841, now seen corresponding path program 6 times [2024-05-12 13:10:15,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:15,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732513867] [2024-05-12 13:10:15,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:15,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:15,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:16,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:16,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:16,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732513867] [2024-05-12 13:10:16,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732513867] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:16,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:16,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:10:16,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855655277] [2024-05-12 13:10:16,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:16,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:10:16,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:16,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:10:16,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:10:16,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:10:16,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 356 transitions, 3915 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:16,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:16,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:10:16,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:18,993 INFO L124 PetriNetUnfolderBase]: 7792/13088 cut-off events. [2024-05-12 13:10:18,993 INFO L125 PetriNetUnfolderBase]: For 798725/798742 co-relation queries the response was YES. [2024-05-12 13:10:19,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88211 conditions, 13088 events. 7792/13088 cut-off events. For 798725/798742 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 96226 event pairs, 2290 based on Foata normal form. 16/12668 useless extension candidates. Maximal degree in co-relation 88081. Up to 10705 conditions per place. [2024-05-12 13:10:19,208 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 276 selfloop transitions, 74 changer transitions 0/379 dead transitions. [2024-05-12 13:10:19,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 379 transitions, 4711 flow [2024-05-12 13:10:19,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:10:19,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:10:19,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-05-12 13:10:19,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5057142857142857 [2024-05-12 13:10:19,209 INFO L175 Difference]: Start difference. First operand has 266 places, 356 transitions, 3915 flow. Second operand 7 states and 177 transitions. [2024-05-12 13:10:19,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 379 transitions, 4711 flow [2024-05-12 13:10:21,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 379 transitions, 4496 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-05-12 13:10:21,123 INFO L231 Difference]: Finished difference. Result has 269 places, 356 transitions, 3856 flow [2024-05-12 13:10:21,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3700, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3856, PETRI_PLACES=269, PETRI_TRANSITIONS=356} [2024-05-12 13:10:21,123 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 213 predicate places. [2024-05-12 13:10:21,123 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 356 transitions, 3856 flow [2024-05-12 13:10:21,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:21,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:21,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:21,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-05-12 13:10:21,124 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:21,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:21,124 INFO L85 PathProgramCache]: Analyzing trace with hash 459487295, now seen corresponding path program 1 times [2024-05-12 13:10:21,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:21,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022697364] [2024-05-12 13:10:21,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:21,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:21,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:22,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:22,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:22,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022697364] [2024-05-12 13:10:22,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022697364] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:22,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:22,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:10:22,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184269320] [2024-05-12 13:10:22,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:22,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:10:22,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:22,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:10:22,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:10:22,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:10:22,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 356 transitions, 3856 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:22,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:22,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:10:22,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:25,124 INFO L124 PetriNetUnfolderBase]: 8201/13382 cut-off events. [2024-05-12 13:10:25,124 INFO L125 PetriNetUnfolderBase]: For 820031/820031 co-relation queries the response was YES. [2024-05-12 13:10:25,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90890 conditions, 13382 events. 8201/13382 cut-off events. For 820031/820031 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 95144 event pairs, 2212 based on Foata normal form. 4/13073 useless extension candidates. Maximal degree in co-relation 90759. Up to 10972 conditions per place. [2024-05-12 13:10:25,336 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 300 selfloop transitions, 117 changer transitions 0/427 dead transitions. [2024-05-12 13:10:25,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 427 transitions, 5064 flow [2024-05-12 13:10:25,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:10:25,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:10:25,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 259 transitions. [2024-05-12 13:10:25,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.518 [2024-05-12 13:10:25,337 INFO L175 Difference]: Start difference. First operand has 269 places, 356 transitions, 3856 flow. Second operand 10 states and 259 transitions. [2024-05-12 13:10:25,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 427 transitions, 5064 flow [2024-05-12 13:10:27,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 427 transitions, 4887 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-05-12 13:10:27,292 INFO L231 Difference]: Finished difference. Result has 273 places, 361 transitions, 4014 flow [2024-05-12 13:10:27,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3679, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4014, PETRI_PLACES=273, PETRI_TRANSITIONS=361} [2024-05-12 13:10:27,292 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 217 predicate places. [2024-05-12 13:10:27,293 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 361 transitions, 4014 flow [2024-05-12 13:10:27,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:27,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:27,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:27,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-05-12 13:10:27,293 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:27,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:27,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1871582623, now seen corresponding path program 2 times [2024-05-12 13:10:27,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:27,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922598463] [2024-05-12 13:10:27,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:27,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:27,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:28,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:28,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:28,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922598463] [2024-05-12 13:10:28,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922598463] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:28,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:28,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:10:28,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637911250] [2024-05-12 13:10:28,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:28,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:10:28,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:28,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:10:28,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:10:28,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:10:28,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 361 transitions, 4014 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:28,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:28,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:10:28,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:31,361 INFO L124 PetriNetUnfolderBase]: 8261/13502 cut-off events. [2024-05-12 13:10:31,361 INFO L125 PetriNetUnfolderBase]: For 848556/848556 co-relation queries the response was YES. [2024-05-12 13:10:31,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93297 conditions, 13502 events. 8261/13502 cut-off events. For 848556/848556 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 96236 event pairs, 2203 based on Foata normal form. 4/13188 useless extension candidates. Maximal degree in co-relation 93164. Up to 11042 conditions per place. [2024-05-12 13:10:31,552 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 289 selfloop transitions, 136 changer transitions 0/435 dead transitions. [2024-05-12 13:10:31,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 435 transitions, 5288 flow [2024-05-12 13:10:31,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:10:31,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:10:31,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 259 transitions. [2024-05-12 13:10:31,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.518 [2024-05-12 13:10:31,553 INFO L175 Difference]: Start difference. First operand has 273 places, 361 transitions, 4014 flow. Second operand 10 states and 259 transitions. [2024-05-12 13:10:31,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 435 transitions, 5288 flow [2024-05-12 13:10:33,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 435 transitions, 4977 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-05-12 13:10:33,516 INFO L231 Difference]: Finished difference. Result has 277 places, 374 transitions, 4176 flow [2024-05-12 13:10:33,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3723, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4176, PETRI_PLACES=277, PETRI_TRANSITIONS=374} [2024-05-12 13:10:33,517 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 221 predicate places. [2024-05-12 13:10:33,517 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 374 transitions, 4176 flow [2024-05-12 13:10:33,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:33,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:33,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:33,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-05-12 13:10:33,517 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:33,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:33,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1528383041, now seen corresponding path program 3 times [2024-05-12 13:10:33,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:33,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482827235] [2024-05-12 13:10:33,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:33,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:33,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:34,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:34,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:34,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482827235] [2024-05-12 13:10:34,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482827235] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:34,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:34,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:10:34,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433023747] [2024-05-12 13:10:34,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:34,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:10:34,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:34,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:10:34,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:10:34,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:10:34,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 374 transitions, 4176 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:34,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:34,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:10:34,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:37,952 INFO L124 PetriNetUnfolderBase]: 8298/13557 cut-off events. [2024-05-12 13:10:37,952 INFO L125 PetriNetUnfolderBase]: For 873703/873703 co-relation queries the response was YES. [2024-05-12 13:10:38,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94913 conditions, 13557 events. 8298/13557 cut-off events. For 873703/873703 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 96601 event pairs, 2218 based on Foata normal form. 4/13246 useless extension candidates. Maximal degree in co-relation 94778. Up to 11097 conditions per place. [2024-05-12 13:10:38,132 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 296 selfloop transitions, 133 changer transitions 0/439 dead transitions. [2024-05-12 13:10:38,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 439 transitions, 5382 flow [2024-05-12 13:10:38,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:10:38,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:10:38,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 259 transitions. [2024-05-12 13:10:38,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.518 [2024-05-12 13:10:38,134 INFO L175 Difference]: Start difference. First operand has 277 places, 374 transitions, 4176 flow. Second operand 10 states and 259 transitions. [2024-05-12 13:10:38,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 439 transitions, 5382 flow [2024-05-12 13:10:39,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 439 transitions, 5082 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-05-12 13:10:39,824 INFO L231 Difference]: Finished difference. Result has 283 places, 377 transitions, 4246 flow [2024-05-12 13:10:39,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3880, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4246, PETRI_PLACES=283, PETRI_TRANSITIONS=377} [2024-05-12 13:10:39,824 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 227 predicate places. [2024-05-12 13:10:39,824 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 377 transitions, 4246 flow [2024-05-12 13:10:39,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:39,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:39,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:39,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-05-12 13:10:39,825 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:39,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:39,825 INFO L85 PathProgramCache]: Analyzing trace with hash 172860661, now seen corresponding path program 4 times [2024-05-12 13:10:39,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:39,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462030520] [2024-05-12 13:10:39,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:39,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:39,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:41,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:41,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:41,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462030520] [2024-05-12 13:10:41,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462030520] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:41,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:41,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:10:41,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777812157] [2024-05-12 13:10:41,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:41,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:10:41,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:41,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:10:41,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:10:41,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:10:41,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 377 transitions, 4246 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:41,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:41,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:10:41,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:43,987 INFO L124 PetriNetUnfolderBase]: 8383/13674 cut-off events. [2024-05-12 13:10:43,987 INFO L125 PetriNetUnfolderBase]: For 883448/883448 co-relation queries the response was YES. [2024-05-12 13:10:44,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94347 conditions, 13674 events. 8383/13674 cut-off events. For 883448/883448 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 97473 event pairs, 1992 based on Foata normal form. 4/13373 useless extension candidates. Maximal degree in co-relation 94210. Up to 10841 conditions per place. [2024-05-12 13:10:44,199 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 291 selfloop transitions, 148 changer transitions 0/449 dead transitions. [2024-05-12 13:10:44,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 449 transitions, 5832 flow [2024-05-12 13:10:44,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:10:44,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:10:44,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 265 transitions. [2024-05-12 13:10:44,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53 [2024-05-12 13:10:44,200 INFO L175 Difference]: Start difference. First operand has 283 places, 377 transitions, 4246 flow. Second operand 10 states and 265 transitions. [2024-05-12 13:10:44,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 449 transitions, 5832 flow [2024-05-12 13:10:46,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 449 transitions, 5499 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-05-12 13:10:46,018 INFO L231 Difference]: Finished difference. Result has 287 places, 382 transitions, 4399 flow [2024-05-12 13:10:46,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3913, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4399, PETRI_PLACES=287, PETRI_TRANSITIONS=382} [2024-05-12 13:10:46,018 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 231 predicate places. [2024-05-12 13:10:46,018 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 382 transitions, 4399 flow [2024-05-12 13:10:46,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:46,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:46,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:46,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-05-12 13:10:46,019 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:46,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:46,019 INFO L85 PathProgramCache]: Analyzing trace with hash 2128165473, now seen corresponding path program 5 times [2024-05-12 13:10:46,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:46,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070178696] [2024-05-12 13:10:46,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:46,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:46,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:47,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:47,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:47,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070178696] [2024-05-12 13:10:47,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070178696] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:47,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:47,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:10:47,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364675394] [2024-05-12 13:10:47,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:47,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:10:47,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:47,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:10:47,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:10:47,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:10:47,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 382 transitions, 4399 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:47,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:47,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:10:47,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:50,284 INFO L124 PetriNetUnfolderBase]: 8375/13728 cut-off events. [2024-05-12 13:10:50,284 INFO L125 PetriNetUnfolderBase]: For 892664/892664 co-relation queries the response was YES. [2024-05-12 13:10:50,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94676 conditions, 13728 events. 8375/13728 cut-off events. For 892664/892664 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 98442 event pairs, 2246 based on Foata normal form. 4/13410 useless extension candidates. Maximal degree in co-relation 94537. Up to 11220 conditions per place. [2024-05-12 13:10:50,533 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 299 selfloop transitions, 135 changer transitions 0/444 dead transitions. [2024-05-12 13:10:50,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 444 transitions, 5532 flow [2024-05-12 13:10:50,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:10:50,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:10:50,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 259 transitions. [2024-05-12 13:10:50,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.518 [2024-05-12 13:10:50,534 INFO L175 Difference]: Start difference. First operand has 287 places, 382 transitions, 4399 flow. Second operand 10 states and 259 transitions. [2024-05-12 13:10:50,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 444 transitions, 5532 flow [2024-05-12 13:10:52,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 444 transitions, 5154 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-05-12 13:10:52,925 INFO L231 Difference]: Finished difference. Result has 291 places, 383 transitions, 4321 flow [2024-05-12 13:10:52,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4023, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4321, PETRI_PLACES=291, PETRI_TRANSITIONS=383} [2024-05-12 13:10:52,926 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 235 predicate places. [2024-05-12 13:10:52,926 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 383 transitions, 4321 flow [2024-05-12 13:10:52,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:52,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:52,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:52,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-05-12 13:10:52,927 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:52,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:52,927 INFO L85 PathProgramCache]: Analyzing trace with hash 648401257, now seen corresponding path program 4 times [2024-05-12 13:10:52,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:52,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372475078] [2024-05-12 13:10:52,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:52,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:52,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:54,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:54,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:54,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372475078] [2024-05-12 13:10:54,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372475078] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:54,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:54,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:10:54,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340383351] [2024-05-12 13:10:54,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:54,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:10:54,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:54,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:10:54,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:10:54,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:10:54,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 383 transitions, 4321 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:54,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:54,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:10:54,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:57,166 INFO L124 PetriNetUnfolderBase]: 8099/13681 cut-off events. [2024-05-12 13:10:57,166 INFO L125 PetriNetUnfolderBase]: For 914184/914213 co-relation queries the response was YES. [2024-05-12 13:10:57,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93438 conditions, 13681 events. 8099/13681 cut-off events. For 914184/914213 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 102032 event pairs, 2234 based on Foata normal form. 28/13261 useless extension candidates. Maximal degree in co-relation 93297. Up to 11048 conditions per place. [2024-05-12 13:10:57,379 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 311 selfloop transitions, 81 changer transitions 0/421 dead transitions. [2024-05-12 13:10:57,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 421 transitions, 5637 flow [2024-05-12 13:10:57,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:10:57,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:10:57,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-05-12 13:10:57,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.505 [2024-05-12 13:10:57,380 INFO L175 Difference]: Start difference. First operand has 291 places, 383 transitions, 4321 flow. Second operand 8 states and 202 transitions. [2024-05-12 13:10:57,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 421 transitions, 5637 flow [2024-05-12 13:10:59,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 421 transitions, 5340 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-05-12 13:10:59,407 INFO L231 Difference]: Finished difference. Result has 293 places, 391 transitions, 4416 flow [2024-05-12 13:10:59,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4024, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4416, PETRI_PLACES=293, PETRI_TRANSITIONS=391} [2024-05-12 13:10:59,408 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 237 predicate places. [2024-05-12 13:10:59,408 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 391 transitions, 4416 flow [2024-05-12 13:10:59,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:59,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:59,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:59,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-05-12 13:10:59,408 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:59,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:59,408 INFO L85 PathProgramCache]: Analyzing trace with hash 648401753, now seen corresponding path program 3 times [2024-05-12 13:10:59,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:59,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856203602] [2024-05-12 13:10:59,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:59,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:59,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:00,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:00,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:00,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856203602] [2024-05-12 13:11:00,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856203602] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:00,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:00,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:11:00,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639893312] [2024-05-12 13:11:00,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:00,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:11:00,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:00,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:11:00,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:11:00,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:11:00,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 391 transitions, 4416 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:00,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:00,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:11:00,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:03,623 INFO L124 PetriNetUnfolderBase]: 8129/13870 cut-off events. [2024-05-12 13:11:03,623 INFO L125 PetriNetUnfolderBase]: For 955193/955229 co-relation queries the response was YES. [2024-05-12 13:11:03,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95227 conditions, 13870 events. 8129/13870 cut-off events. For 955193/955229 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 104826 event pairs, 2888 based on Foata normal form. 35/13433 useless extension candidates. Maximal degree in co-relation 95084. Up to 11602 conditions per place. [2024-05-12 13:11:03,834 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 355 selfloop transitions, 39 changer transitions 0/423 dead transitions. [2024-05-12 13:11:03,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 423 transitions, 5424 flow [2024-05-12 13:11:03,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:11:03,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:11:03,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-05-12 13:11:03,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4825 [2024-05-12 13:11:03,835 INFO L175 Difference]: Start difference. First operand has 293 places, 391 transitions, 4416 flow. Second operand 8 states and 193 transitions. [2024-05-12 13:11:03,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 423 transitions, 5424 flow [2024-05-12 13:11:06,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 423 transitions, 5215 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-05-12 13:11:06,226 INFO L231 Difference]: Finished difference. Result has 297 places, 394 transitions, 4391 flow [2024-05-12 13:11:06,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4207, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4391, PETRI_PLACES=297, PETRI_TRANSITIONS=394} [2024-05-12 13:11:06,227 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 241 predicate places. [2024-05-12 13:11:06,227 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 394 transitions, 4391 flow [2024-05-12 13:11:06,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:06,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:06,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:06,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-05-12 13:11:06,227 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:06,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:06,228 INFO L85 PathProgramCache]: Analyzing trace with hash 664591193, now seen corresponding path program 4 times [2024-05-12 13:11:06,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:06,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043612888] [2024-05-12 13:11:06,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:06,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:06,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:07,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:07,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:07,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043612888] [2024-05-12 13:11:07,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043612888] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:07,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:07,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:11:07,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297125349] [2024-05-12 13:11:07,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:07,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:11:07,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:07,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:11:07,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:11:07,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:11:07,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 394 transitions, 4391 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:07,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:07,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:11:07,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:10,420 INFO L124 PetriNetUnfolderBase]: 8135/14004 cut-off events. [2024-05-12 13:11:10,420 INFO L125 PetriNetUnfolderBase]: For 979261/979293 co-relation queries the response was YES. [2024-05-12 13:11:10,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96024 conditions, 14004 events. 8135/14004 cut-off events. For 979261/979293 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 107086 event pairs, 3506 based on Foata normal form. 33/13541 useless extension candidates. Maximal degree in co-relation 95879. Up to 11693 conditions per place. [2024-05-12 13:11:10,700 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 377 selfloop transitions, 19 changer transitions 0/425 dead transitions. [2024-05-12 13:11:10,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 425 transitions, 5397 flow [2024-05-12 13:11:10,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:11:10,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:11:10,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-05-12 13:11:10,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-05-12 13:11:10,702 INFO L175 Difference]: Start difference. First operand has 297 places, 394 transitions, 4391 flow. Second operand 8 states and 190 transitions. [2024-05-12 13:11:10,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 425 transitions, 5397 flow [2024-05-12 13:11:13,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 425 transitions, 5241 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-05-12 13:11:13,238 INFO L231 Difference]: Finished difference. Result has 299 places, 397 transitions, 4379 flow [2024-05-12 13:11:13,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4235, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4379, PETRI_PLACES=299, PETRI_TRANSITIONS=397} [2024-05-12 13:11:13,239 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 243 predicate places. [2024-05-12 13:11:13,239 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 397 transitions, 4379 flow [2024-05-12 13:11:13,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:13,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:13,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:13,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-05-12 13:11:13,239 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:13,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:13,239 INFO L85 PathProgramCache]: Analyzing trace with hash 648387307, now seen corresponding path program 5 times [2024-05-12 13:11:13,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:13,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215297675] [2024-05-12 13:11:13,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:13,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:14,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:14,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:14,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215297675] [2024-05-12 13:11:14,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215297675] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:14,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:14,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:11:14,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057771615] [2024-05-12 13:11:14,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:14,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:11:14,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:14,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:11:14,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:11:14,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:11:14,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 397 transitions, 4379 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:14,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:14,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:11:14,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:17,214 INFO L124 PetriNetUnfolderBase]: 8164/13775 cut-off events. [2024-05-12 13:11:17,215 INFO L125 PetriNetUnfolderBase]: For 985222/985251 co-relation queries the response was YES. [2024-05-12 13:11:17,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96390 conditions, 13775 events. 8164/13775 cut-off events. For 985222/985251 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 102732 event pairs, 2222 based on Foata normal form. 28/13348 useless extension candidates. Maximal degree in co-relation 96244. Up to 11221 conditions per place. [2024-05-12 13:11:17,454 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 320 selfloop transitions, 80 changer transitions 0/429 dead transitions. [2024-05-12 13:11:17,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 429 transitions, 5396 flow [2024-05-12 13:11:17,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:11:17,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:11:17,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-05-12 13:11:17,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-05-12 13:11:17,455 INFO L175 Difference]: Start difference. First operand has 299 places, 397 transitions, 4379 flow. Second operand 8 states and 200 transitions. [2024-05-12 13:11:17,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 429 transitions, 5396 flow [2024-05-12 13:11:20,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 429 transitions, 5274 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-05-12 13:11:20,195 INFO L231 Difference]: Finished difference. Result has 301 places, 401 transitions, 4529 flow [2024-05-12 13:11:20,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4257, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4529, PETRI_PLACES=301, PETRI_TRANSITIONS=401} [2024-05-12 13:11:20,196 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 245 predicate places. [2024-05-12 13:11:20,196 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 401 transitions, 4529 flow [2024-05-12 13:11:20,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:20,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:20,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:20,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-05-12 13:11:20,196 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:20,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:20,197 INFO L85 PathProgramCache]: Analyzing trace with hash 664055947, now seen corresponding path program 6 times [2024-05-12 13:11:20,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:20,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428765074] [2024-05-12 13:11:20,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:20,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:20,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:21,613 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 13:11:21,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:21,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428765074] [2024-05-12 13:11:21,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428765074] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:21,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:21,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:11:21,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716417034] [2024-05-12 13:11:21,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:21,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:11:21,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:21,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:11:21,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:11:21,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:11:21,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 401 transitions, 4529 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:21,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:21,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:11:21,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:24,329 INFO L124 PetriNetUnfolderBase]: 8187/13892 cut-off events. [2024-05-12 13:11:24,329 INFO L125 PetriNetUnfolderBase]: For 1000823/1000852 co-relation queries the response was YES. [2024-05-12 13:11:24,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97483 conditions, 13892 events. 8187/13892 cut-off events. For 1000823/1000852 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 104332 event pairs, 2221 based on Foata normal form. 28/13441 useless extension candidates. Maximal degree in co-relation 97336. Up to 10866 conditions per place. [2024-05-12 13:11:24,564 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 305 selfloop transitions, 112 changer transitions 0/446 dead transitions. [2024-05-12 13:11:24,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 446 transitions, 6121 flow [2024-05-12 13:11:24,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:11:24,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:11:24,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-05-12 13:11:24,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-05-12 13:11:24,566 INFO L175 Difference]: Start difference. First operand has 301 places, 401 transitions, 4529 flow. Second operand 8 states and 204 transitions. [2024-05-12 13:11:24,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 446 transitions, 6121 flow [2024-05-12 13:11:26,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 446 transitions, 5886 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-05-12 13:11:26,984 INFO L231 Difference]: Finished difference. Result has 305 places, 416 transitions, 4891 flow [2024-05-12 13:11:26,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4294, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4891, PETRI_PLACES=305, PETRI_TRANSITIONS=416} [2024-05-12 13:11:26,984 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 249 predicate places. [2024-05-12 13:11:26,985 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 416 transitions, 4891 flow [2024-05-12 13:11:26,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:26,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:26,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:26,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-05-12 13:11:26,985 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:26,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:26,986 INFO L85 PathProgramCache]: Analyzing trace with hash 393192773, now seen corresponding path program 5 times [2024-05-12 13:11:26,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:26,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324604788] [2024-05-12 13:11:26,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:26,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:28,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:28,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:28,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324604788] [2024-05-12 13:11:28,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324604788] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:28,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:28,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:11:28,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568783546] [2024-05-12 13:11:28,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:28,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:11:28,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:28,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:11:28,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:11:28,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:11:28,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 416 transitions, 4891 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:28,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:28,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:11:28,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:31,197 INFO L124 PetriNetUnfolderBase]: 8217/14072 cut-off events. [2024-05-12 13:11:31,198 INFO L125 PetriNetUnfolderBase]: For 1057955/1057991 co-relation queries the response was YES. [2024-05-12 13:11:31,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100479 conditions, 14072 events. 8217/14072 cut-off events. For 1057955/1057991 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 107224 event pairs, 2892 based on Foata normal form. 35/13615 useless extension candidates. Maximal degree in co-relation 100329. Up to 11557 conditions per place. [2024-05-12 13:11:31,551 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 357 selfloop transitions, 71 changer transitions 0/457 dead transitions. [2024-05-12 13:11:31,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 457 transitions, 6573 flow [2024-05-12 13:11:31,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:11:31,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:11:31,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-05-12 13:11:31,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-05-12 13:11:31,553 INFO L175 Difference]: Start difference. First operand has 305 places, 416 transitions, 4891 flow. Second operand 8 states and 200 transitions. [2024-05-12 13:11:31,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 457 transitions, 6573 flow [2024-05-12 13:11:34,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 457 transitions, 6334 flow, removed 79 selfloop flow, removed 3 redundant places. [2024-05-12 13:11:34,844 INFO L231 Difference]: Finished difference. Result has 310 places, 425 transitions, 5136 flow [2024-05-12 13:11:34,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4652, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5136, PETRI_PLACES=310, PETRI_TRANSITIONS=425} [2024-05-12 13:11:34,845 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 254 predicate places. [2024-05-12 13:11:34,845 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 425 transitions, 5136 flow [2024-05-12 13:11:34,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:34,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:34,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:34,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-05-12 13:11:34,845 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:34,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:34,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1888268089, now seen corresponding path program 1 times [2024-05-12 13:11:34,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:34,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230702349] [2024-05-12 13:11:34,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:34,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:34,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:35,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:35,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:35,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230702349] [2024-05-12 13:11:35,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230702349] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:35,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:35,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:11:35,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465051112] [2024-05-12 13:11:35,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:35,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:11:35,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:35,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:11:35,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:11:35,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:11:35,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 425 transitions, 5136 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:35,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:35,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:11:35,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:38,921 INFO L124 PetriNetUnfolderBase]: 8275/13838 cut-off events. [2024-05-12 13:11:38,921 INFO L125 PetriNetUnfolderBase]: For 1071459/1071583 co-relation queries the response was YES. [2024-05-12 13:11:39,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99866 conditions, 13838 events. 8275/13838 cut-off events. For 1071459/1071583 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 102120 event pairs, 3494 based on Foata normal form. 54/13568 useless extension candidates. Maximal degree in co-relation 99714. Up to 11796 conditions per place. [2024-05-12 13:11:39,158 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 415 selfloop transitions, 22 changer transitions 0/464 dead transitions. [2024-05-12 13:11:39,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 464 transitions, 6217 flow [2024-05-12 13:11:39,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:11:39,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:11:39,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-05-12 13:11:39,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4925 [2024-05-12 13:11:39,159 INFO L175 Difference]: Start difference. First operand has 310 places, 425 transitions, 5136 flow. Second operand 8 states and 197 transitions. [2024-05-12 13:11:39,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 464 transitions, 6217 flow [2024-05-12 13:11:42,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 464 transitions, 6064 flow, removed 58 selfloop flow, removed 3 redundant places. [2024-05-12 13:11:42,544 INFO L231 Difference]: Finished difference. Result has 316 places, 432 transitions, 5153 flow [2024-05-12 13:11:42,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4983, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5153, PETRI_PLACES=316, PETRI_TRANSITIONS=432} [2024-05-12 13:11:42,545 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 260 predicate places. [2024-05-12 13:11:42,545 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 432 transitions, 5153 flow [2024-05-12 13:11:42,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:42,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:42,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:42,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-05-12 13:11:42,546 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:42,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:42,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1888418749, now seen corresponding path program 2 times [2024-05-12 13:11:42,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:42,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224540025] [2024-05-12 13:11:42,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:42,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:42,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:44,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:44,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:44,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224540025] [2024-05-12 13:11:44,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224540025] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:44,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:44,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:11:44,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297127858] [2024-05-12 13:11:44,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:44,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:11:44,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:44,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:11:44,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:11:44,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:11:44,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 432 transitions, 5153 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:44,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:44,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:11:44,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:47,810 INFO L124 PetriNetUnfolderBase]: 8309/13860 cut-off events. [2024-05-12 13:11:47,811 INFO L125 PetriNetUnfolderBase]: For 1089839/1089963 co-relation queries the response was YES. [2024-05-12 13:11:47,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101367 conditions, 13860 events. 8309/13860 cut-off events. For 1089839/1089963 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 102044 event pairs, 3474 based on Foata normal form. 54/13594 useless extension candidates. Maximal degree in co-relation 101212. Up to 11811 conditions per place. [2024-05-12 13:11:48,019 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 413 selfloop transitions, 27 changer transitions 0/467 dead transitions. [2024-05-12 13:11:48,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 467 transitions, 6219 flow [2024-05-12 13:11:48,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:11:48,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:11:48,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-05-12 13:11:48,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.495 [2024-05-12 13:11:48,020 INFO L175 Difference]: Start difference. First operand has 316 places, 432 transitions, 5153 flow. Second operand 8 states and 198 transitions. [2024-05-12 13:11:48,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 467 transitions, 6219 flow [2024-05-12 13:11:51,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 467 transitions, 6118 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-05-12 13:11:51,338 INFO L231 Difference]: Finished difference. Result has 319 places, 435 transitions, 5184 flow [2024-05-12 13:11:51,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5052, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5184, PETRI_PLACES=319, PETRI_TRANSITIONS=435} [2024-05-12 13:11:51,339 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 263 predicate places. [2024-05-12 13:11:51,339 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 435 transitions, 5184 flow [2024-05-12 13:11:51,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:51,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:51,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:51,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-05-12 13:11:51,339 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:51,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:51,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1888418997, now seen corresponding path program 1 times [2024-05-12 13:11:51,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:51,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309100899] [2024-05-12 13:11:51,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:51,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:51,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:52,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:52,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:52,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309100899] [2024-05-12 13:11:52,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309100899] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:52,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:52,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:11:52,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514157182] [2024-05-12 13:11:52,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:52,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:11:52,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:52,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:11:52,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:11:52,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:11:52,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 435 transitions, 5184 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:52,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:52,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:11:52,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:56,284 INFO L124 PetriNetUnfolderBase]: 8323/13884 cut-off events. [2024-05-12 13:11:56,284 INFO L125 PetriNetUnfolderBase]: For 1112606/1112730 co-relation queries the response was YES. [2024-05-12 13:11:56,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102421 conditions, 13884 events. 8323/13884 cut-off events. For 1112606/1112730 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 102271 event pairs, 3472 based on Foata normal form. 54/13616 useless extension candidates. Maximal degree in co-relation 102265. Up to 11869 conditions per place. [2024-05-12 13:11:56,531 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 420 selfloop transitions, 21 changer transitions 0/468 dead transitions. [2024-05-12 13:11:56,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 468 transitions, 6236 flow [2024-05-12 13:11:56,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:11:56,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:11:56,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-05-12 13:11:56,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.485 [2024-05-12 13:11:56,532 INFO L175 Difference]: Start difference. First operand has 319 places, 435 transitions, 5184 flow. Second operand 8 states and 194 transitions. [2024-05-12 13:11:56,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 468 transitions, 6236 flow [2024-05-12 13:11:59,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 468 transitions, 6126 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-05-12 13:11:59,931 INFO L231 Difference]: Finished difference. Result has 321 places, 438 transitions, 5186 flow [2024-05-12 13:11:59,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5074, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5186, PETRI_PLACES=321, PETRI_TRANSITIONS=438} [2024-05-12 13:11:59,932 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 265 predicate places. [2024-05-12 13:11:59,932 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 438 transitions, 5186 flow [2024-05-12 13:11:59,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:59,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:59,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:11:59,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-05-12 13:11:59,932 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:59,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:59,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1894020387, now seen corresponding path program 2 times [2024-05-12 13:11:59,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:59,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169824061] [2024-05-12 13:11:59,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:59,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:59,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:01,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:01,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:01,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169824061] [2024-05-12 13:12:01,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169824061] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:01,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:01,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:12:01,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538830428] [2024-05-12 13:12:01,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:01,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:12:01,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:01,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:12:01,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:12:01,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:12:01,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 438 transitions, 5186 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:01,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:01,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:12:01,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:05,076 INFO L124 PetriNetUnfolderBase]: 8378/13978 cut-off events. [2024-05-12 13:12:05,076 INFO L125 PetriNetUnfolderBase]: For 1142535/1142659 co-relation queries the response was YES. [2024-05-12 13:12:05,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103934 conditions, 13978 events. 8378/13978 cut-off events. For 1142535/1142659 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 103067 event pairs, 3467 based on Foata normal form. 54/13707 useless extension candidates. Maximal degree in co-relation 103777. Up to 11875 conditions per place. [2024-05-12 13:12:05,285 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 414 selfloop transitions, 35 changer transitions 0/476 dead transitions. [2024-05-12 13:12:05,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 476 transitions, 6538 flow [2024-05-12 13:12:05,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:12:05,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:12:05,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-05-12 13:12:05,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49 [2024-05-12 13:12:05,286 INFO L175 Difference]: Start difference. First operand has 321 places, 438 transitions, 5186 flow. Second operand 8 states and 196 transitions. [2024-05-12 13:12:05,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 476 transitions, 6538 flow [2024-05-12 13:12:08,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 476 transitions, 6448 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-05-12 13:12:08,401 INFO L231 Difference]: Finished difference. Result has 324 places, 446 transitions, 5342 flow [2024-05-12 13:12:08,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5096, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5342, PETRI_PLACES=324, PETRI_TRANSITIONS=446} [2024-05-12 13:12:08,402 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 268 predicate places. [2024-05-12 13:12:08,402 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 446 transitions, 5342 flow [2024-05-12 13:12:08,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:08,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:08,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:08,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-05-12 13:12:08,402 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:08,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:08,403 INFO L85 PathProgramCache]: Analyzing trace with hash 314526667, now seen corresponding path program 3 times [2024-05-12 13:12:08,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:08,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720688233] [2024-05-12 13:12:08,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:08,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:08,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:09,698 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 13:12:09,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:09,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720688233] [2024-05-12 13:12:09,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720688233] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:09,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:09,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:12:09,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211616821] [2024-05-12 13:12:09,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:09,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:12:09,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:09,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:12:09,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:12:09,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:12:09,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 446 transitions, 5342 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:09,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:09,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:12:09,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:13,396 INFO L124 PetriNetUnfolderBase]: 8387/13988 cut-off events. [2024-05-12 13:12:13,396 INFO L125 PetriNetUnfolderBase]: For 1163356/1163480 co-relation queries the response was YES. [2024-05-12 13:12:13,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104854 conditions, 13988 events. 8387/13988 cut-off events. For 1163356/1163480 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 103145 event pairs, 3475 based on Foata normal form. 55/13720 useless extension candidates. Maximal degree in co-relation 104695. Up to 11926 conditions per place. [2024-05-12 13:12:13,605 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 424 selfloop transitions, 28 changer transitions 0/479 dead transitions. [2024-05-12 13:12:13,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 479 transitions, 6451 flow [2024-05-12 13:12:13,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:12:13,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:12:13,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-05-12 13:12:13,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2024-05-12 13:12:13,607 INFO L175 Difference]: Start difference. First operand has 324 places, 446 transitions, 5342 flow. Second operand 8 states and 195 transitions. [2024-05-12 13:12:13,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 479 transitions, 6451 flow [2024-05-12 13:12:17,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 479 transitions, 6309 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-05-12 13:12:17,768 INFO L231 Difference]: Finished difference. Result has 328 places, 449 transitions, 5348 flow [2024-05-12 13:12:17,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5206, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5348, PETRI_PLACES=328, PETRI_TRANSITIONS=449} [2024-05-12 13:12:17,769 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 272 predicate places. [2024-05-12 13:12:17,769 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 449 transitions, 5348 flow [2024-05-12 13:12:17,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:17,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:17,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:17,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-05-12 13:12:17,770 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:17,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:17,770 INFO L85 PathProgramCache]: Analyzing trace with hash 314526419, now seen corresponding path program 3 times [2024-05-12 13:12:17,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:17,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730674778] [2024-05-12 13:12:17,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:17,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:17,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:18,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:18,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:18,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730674778] [2024-05-12 13:12:18,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730674778] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:18,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:18,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:12:18,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967234831] [2024-05-12 13:12:18,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:18,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:12:18,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:18,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:12:18,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:12:19,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:12:19,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 449 transitions, 5348 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:19,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:19,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:12:19,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand