./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix035_power.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/protection/mix035_power.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b44c8288 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix035_power.opt_rmo.opt.i ./goblint.2024-05-07_14-17-48.files/protection/mix035_power.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.witness-ghost-b44c828-m [2024-05-12 13:18:43,989 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 13:18:44,049 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 13:18:44,053 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 13:18:44,054 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 13:18:44,078 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 13:18:44,078 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 13:18:44,079 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 13:18:44,079 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 13:18:44,079 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 13:18:44,080 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 13:18:44,080 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 13:18:44,080 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 13:18:44,081 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 13:18:44,081 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 13:18:44,081 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 13:18:44,081 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 13:18:44,082 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 13:18:44,082 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 13:18:44,082 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 13:18:44,082 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 13:18:44,083 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 13:18:44,083 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 13:18:44,083 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 13:18:44,084 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 13:18:44,084 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 13:18:44,085 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 13:18:44,085 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 13:18:44,085 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 13:18:44,085 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 13:18:44,085 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 13:18:44,086 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 13:18:44,086 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 13:18:44,086 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 13:18:44,086 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 13:18:44,086 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 13:18:44,086 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 13:18:44,087 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 13:18:44,087 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 13:18:44,087 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 13:18:44,087 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 13:18:44,087 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 13:18:44,088 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 13:18:44,088 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 13:18:44,267 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 13:18:44,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 13:18:44,281 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 13:18:44,282 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 13:18:44,282 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 13:18:44,283 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix035_power.opt_rmo.opt.i [2024-05-12 13:18:45,358 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 13:18:45,563 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 13:18:45,567 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix035_power.opt_rmo.opt.i [2024-05-12 13:18:45,580 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0fed5a88/96a4b648573c4711bc8ebff76cb6b222/FLAG44b6c2b52 [2024-05-12 13:18:45,592 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0fed5a88/96a4b648573c4711bc8ebff76cb6b222 [2024-05-12 13:18:45,595 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 13:18:45,595 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 13:18:45,596 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/protection/mix035_power.opt_rmo.opt.yml/witness.yml [2024-05-12 13:18:45,764 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 13:18:45,765 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 13:18:45,767 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 13:18:45,767 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 13:18:45,771 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 13:18:45,772 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 01:18:45" (1/2) ... [2024-05-12 13:18:45,773 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c2ddd08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:18:45, skipping insertion in model container [2024-05-12 13:18:45,773 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 01:18:45" (1/2) ... [2024-05-12 13:18:45,774 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4e02e8b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:18:45, skipping insertion in model container [2024-05-12 13:18:45,774 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 01:18:45" (2/2) ... [2024-05-12 13:18:45,775 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c2ddd08 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:18:45, skipping insertion in model container [2024-05-12 13:18:45,775 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 01:18:45" (2/2) ... [2024-05-12 13:18:45,776 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 13:18:45,850 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 13:18:45,852 INFO L97 edCorrectnessWitness]: Location invariant before [L844-L844] ((((((((((((((((((((! multithreaded || x$flush_delayed == (_Bool)0) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0) [2024-05-12 13:18:45,852 INFO L97 edCorrectnessWitness]: Location invariant before [L847-L847] ((((((((((((((((((((! multithreaded || x$flush_delayed == (_Bool)0) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0) [2024-05-12 13:18:45,852 INFO L97 edCorrectnessWitness]: Location invariant before [L846-L846] ((((((((((((((((((((! multithreaded || x$flush_delayed == (_Bool)0) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0) [2024-05-12 13:18:45,852 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 13:18:45,853 INFO L106 edCorrectnessWitness]: ghost_update [L842-L842] multithreaded = 1; [2024-05-12 13:18:45,892 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 13:18:46,079 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/mix035_power.opt_rmo.opt.i[1001,1014] [2024-05-12 13:18:46,262 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 13:18:46,269 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-05-12 13:18:46,297 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/mix035_power.opt_rmo.opt.i[1001,1014] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 13:18:46,359 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 13:18:46,399 INFO L206 MainTranslator]: Completed translation [2024-05-12 13:18:46,400 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:18:46 WrapperNode [2024-05-12 13:18:46,400 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 13:18:46,401 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 13:18:46,401 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 13:18:46,401 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 13:18:46,407 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 01:18:46" (1/1) ... [2024-05-12 13:18:46,422 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 01:18:46" (1/1) ... [2024-05-12 13:18:46,459 INFO L138 Inliner]: procedures = 176, calls = 58, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 136 [2024-05-12 13:18:46,460 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 13:18:46,460 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 13:18:46,460 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 13:18:46,461 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 13:18:46,469 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 01:18:46" (1/1) ... [2024-05-12 13:18:46,469 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 01:18:46" (1/1) ... [2024-05-12 13:18:46,472 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 01:18:46" (1/1) ... [2024-05-12 13:18:46,491 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 13:18:46,492 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 01:18:46" (1/1) ... [2024-05-12 13:18:46,492 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 01:18:46" (1/1) ... [2024-05-12 13:18:46,503 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 01:18:46" (1/1) ... [2024-05-12 13:18:46,505 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 01:18:46" (1/1) ... [2024-05-12 13:18:46,521 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 01:18:46" (1/1) ... [2024-05-12 13:18:46,522 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 01:18:46" (1/1) ... [2024-05-12 13:18:46,525 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 13:18:46,534 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 13:18:46,534 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 13:18:46,534 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 13:18:46,535 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 01:18:46" (1/1) ... [2024-05-12 13:18:46,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 13:18:46,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 13:18:46,563 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 13:18:46,600 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 13:18:46,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 13:18:46,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 13:18:46,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 13:18:46,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-05-12 13:18:46,615 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 13:18:46,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 13:18:46,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 13:18:46,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 13:18:46,616 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-05-12 13:18:46,616 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-05-12 13:18:46,616 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-05-12 13:18:46,616 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-05-12 13:18:46,617 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-05-12 13:18:46,618 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-05-12 13:18:46,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 13:18:46,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 13:18:46,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 13:18:46,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-05-12 13:18:46,619 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 13:18:46,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 13:18:46,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 13:18:46,620 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 13:18:46,722 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 13:18:46,724 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 13:18:47,111 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 13:18:47,111 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 13:18:47,325 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 13:18:47,325 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-05-12 13:18:47,326 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 01:18:47 BoogieIcfgContainer [2024-05-12 13:18:47,326 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 13:18:47,328 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 13:18:47,328 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 13:18:47,331 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 13:18:47,331 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 01:18:45" (1/4) ... [2024-05-12 13:18:47,331 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ca1e12f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 01:18:47, skipping insertion in model container [2024-05-12 13:18:47,331 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 01:18:45" (2/4) ... [2024-05-12 13:18:47,332 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ca1e12f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 01:18:47, skipping insertion in model container [2024-05-12 13:18:47,332 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 01:18:46" (3/4) ... [2024-05-12 13:18:47,332 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ca1e12f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 01:18:47, skipping insertion in model container [2024-05-12 13:18:47,332 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 01:18:47" (4/4) ... [2024-05-12 13:18:47,333 INFO L112 eAbstractionObserver]: Analyzing ICFG mix035_power.opt_rmo.opt.i [2024-05-12 13:18:47,346 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 13:18:47,346 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-05-12 13:18:47,346 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 13:18:47,393 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-05-12 13:18:47,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 49 transitions, 110 flow [2024-05-12 13:18:47,458 INFO L124 PetriNetUnfolderBase]: 1/46 cut-off events. [2024-05-12 13:18:47,459 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 13:18:47,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 46 events. 1/46 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 73 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2024-05-12 13:18:47,462 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 49 transitions, 110 flow [2024-05-12 13:18:47,467 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 46 transitions, 101 flow [2024-05-12 13:18:47,479 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 13:18:47,486 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;@32029ab2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 13:18:47,486 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-05-12 13:18:47,494 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 13:18:47,494 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-05-12 13:18:47,495 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 13:18:47,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:18:47,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 13:18:47,496 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:18:47,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:18:47,503 INFO L85 PathProgramCache]: Analyzing trace with hash 2122626214, now seen corresponding path program 1 times [2024-05-12 13:18:47,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:18:47,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944310710] [2024-05-12 13:18:47,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:18:47,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:18:47,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:18:48,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:18:48,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:18:48,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944310710] [2024-05-12 13:18:48,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944310710] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:18:48,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:18:48,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 13:18:48,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253942487] [2024-05-12 13:18:48,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:18:48,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 13:18:48,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:18:48,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 13:18:48,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 13:18:48,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-05-12 13:18:48,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 101 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 13:18:48,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:18:48,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-05-12 13:18:48,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:18:49,254 INFO L124 PetriNetUnfolderBase]: 3133/5196 cut-off events. [2024-05-12 13:18:49,254 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-05-12 13:18:49,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9806 conditions, 5196 events. 3133/5196 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 33798 event pairs, 2504 based on Foata normal form. 151/4854 useless extension candidates. Maximal degree in co-relation 9791. Up to 4519 conditions per place. [2024-05-12 13:18:49,283 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 42 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2024-05-12 13:18:49,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 60 transitions, 229 flow [2024-05-12 13:18:49,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 13:18:49,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 13:18:49,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-05-12 13:18:49,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6802721088435374 [2024-05-12 13:18:49,294 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 101 flow. Second operand 3 states and 100 transitions. [2024-05-12 13:18:49,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 60 transitions, 229 flow [2024-05-12 13:18:49,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 60 transitions, 224 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 13:18:49,301 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 133 flow [2024-05-12 13:18:49,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-05-12 13:18:49,305 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 0 predicate places. [2024-05-12 13:18:49,305 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 133 flow [2024-05-12 13:18:49,305 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 13:18:49,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:18:49,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:18:49,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 13:18:49,306 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:18:49,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:18:49,307 INFO L85 PathProgramCache]: Analyzing trace with hash -265638587, now seen corresponding path program 1 times [2024-05-12 13:18:49,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:18:49,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357763634] [2024-05-12 13:18:49,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:18:49,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:18:49,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:18:50,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:18:50,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:18:50,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357763634] [2024-05-12 13:18:50,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357763634] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:18:50,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:18:50,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 13:18:50,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69123499] [2024-05-12 13:18:50,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:18:50,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 13:18:50,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:18:50,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 13:18:50,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 13:18:50,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-05-12 13:18:50,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 133 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 13:18:50,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:18:50,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-05-12 13:18:50,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:18:50,759 INFO L124 PetriNetUnfolderBase]: 3640/5933 cut-off events. [2024-05-12 13:18:50,760 INFO L125 PetriNetUnfolderBase]: For 840/840 co-relation queries the response was YES. [2024-05-12 13:18:50,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12570 conditions, 5933 events. 3640/5933 cut-off events. For 840/840 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 37953 event pairs, 2111 based on Foata normal form. 6/5464 useless extension candidates. Maximal degree in co-relation 12555. Up to 5184 conditions per place. [2024-05-12 13:18:50,783 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 55 selfloop transitions, 9 changer transitions 0/76 dead transitions. [2024-05-12 13:18:50,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 76 transitions, 329 flow [2024-05-12 13:18:50,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 13:18:50,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 13:18:50,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-05-12 13:18:50,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6479591836734694 [2024-05-12 13:18:50,790 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 133 flow. Second operand 4 states and 127 transitions. [2024-05-12 13:18:50,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 76 transitions, 329 flow [2024-05-12 13:18:50,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 76 transitions, 324 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 13:18:50,793 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 179 flow [2024-05-12 13:18:50,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-05-12 13:18:50,798 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 3 predicate places. [2024-05-12 13:18:50,798 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 179 flow [2024-05-12 13:18:50,798 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 13:18:50,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:18:50,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:18:50,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 13:18:50,798 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:18:50,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:18:50,799 INFO L85 PathProgramCache]: Analyzing trace with hash 354448758, now seen corresponding path program 1 times [2024-05-12 13:18:50,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:18:50,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684824551] [2024-05-12 13:18:50,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:18:50,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:18:50,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:18:50,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:18:50,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:18:50,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684824551] [2024-05-12 13:18:50,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684824551] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:18:50,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:18:50,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 13:18:50,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124054918] [2024-05-12 13:18:50,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:18:50,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 13:18:50,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:18:50,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 13:18:50,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 13:18:50,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 49 [2024-05-12 13:18:50,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 179 flow. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 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 13:18:50,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:18:50,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 49 [2024-05-12 13:18:50,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:18:51,091 INFO L124 PetriNetUnfolderBase]: 833/1800 cut-off events. [2024-05-12 13:18:51,091 INFO L125 PetriNetUnfolderBase]: For 452/524 co-relation queries the response was YES. [2024-05-12 13:18:51,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3641 conditions, 1800 events. 833/1800 cut-off events. For 452/524 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12696 event pairs, 207 based on Foata normal form. 7/1684 useless extension candidates. Maximal degree in co-relation 3624. Up to 1044 conditions per place. [2024-05-12 13:18:51,100 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 32 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2024-05-12 13:18:51,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 62 transitions, 258 flow [2024-05-12 13:18:51,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 13:18:51,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 13:18:51,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 110 transitions. [2024-05-12 13:18:51,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7482993197278912 [2024-05-12 13:18:51,103 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 179 flow. Second operand 3 states and 110 transitions. [2024-05-12 13:18:51,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 62 transitions, 258 flow [2024-05-12 13:18:51,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 62 transitions, 244 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-05-12 13:18:51,106 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 154 flow [2024-05-12 13:18:51,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-05-12 13:18:51,108 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-05-12 13:18:51,108 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 154 flow [2024-05-12 13:18:51,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 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 13:18:51,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:18:51,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:18:51,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 13:18:51,109 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:18:51,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:18:51,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1391260244, now seen corresponding path program 1 times [2024-05-12 13:18:51,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:18:51,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267547078] [2024-05-12 13:18:51,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:18:51,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:18:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:18:52,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:18:52,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:18:52,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267547078] [2024-05-12 13:18:52,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267547078] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:18:52,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:18:52,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 13:18:52,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371883273] [2024-05-12 13:18:52,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:18:52,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 13:18:52,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:18:52,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 13:18:52,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-05-12 13:18:52,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-05-12 13:18:52,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 154 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 13:18:52,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:18:52,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-05-12 13:18:52,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:18:52,904 INFO L124 PetriNetUnfolderBase]: 2985/4504 cut-off events. [2024-05-12 13:18:52,904 INFO L125 PetriNetUnfolderBase]: For 2488/2488 co-relation queries the response was YES. [2024-05-12 13:18:52,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10875 conditions, 4504 events. 2985/4504 cut-off events. For 2488/2488 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 25345 event pairs, 805 based on Foata normal form. 6/4457 useless extension candidates. Maximal degree in co-relation 10858. Up to 4212 conditions per place. [2024-05-12 13:18:52,930 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 67 selfloop transitions, 12 changer transitions 5/96 dead transitions. [2024-05-12 13:18:52,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 96 transitions, 440 flow [2024-05-12 13:18:52,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:18:52,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:18:52,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-05-12 13:18:52,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-05-12 13:18:52,932 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 154 flow. Second operand 6 states and 177 transitions. [2024-05-12 13:18:52,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 96 transitions, 440 flow [2024-05-12 13:18:52,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 96 transitions, 428 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 13:18:52,936 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 201 flow [2024-05-12 13:18:52,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=201, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2024-05-12 13:18:52,937 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 6 predicate places. [2024-05-12 13:18:52,937 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 201 flow [2024-05-12 13:18:52,937 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 13:18:52,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:18:52,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:18:52,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 13:18:52,938 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:18:52,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:18:52,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1321867532, now seen corresponding path program 1 times [2024-05-12 13:18:52,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:18:52,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720758996] [2024-05-12 13:18:52,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:18:52,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:18:52,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:18:53,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:18:53,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:18:53,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720758996] [2024-05-12 13:18:53,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720758996] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:18:53,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:18:53,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 13:18:53,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98283429] [2024-05-12 13:18:53,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:18:53,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 13:18:53,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:18:53,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 13:18:53,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 13:18:53,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-05-12 13:18:53,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 201 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 13:18:53,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:18:53,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-05-12 13:18:53,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:18:54,228 INFO L124 PetriNetUnfolderBase]: 2555/4402 cut-off events. [2024-05-12 13:18:54,228 INFO L125 PetriNetUnfolderBase]: For 3286/3286 co-relation queries the response was YES. [2024-05-12 13:18:54,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10589 conditions, 4402 events. 2555/4402 cut-off events. For 3286/3286 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 28430 event pairs, 1145 based on Foata normal form. 2/4272 useless extension candidates. Maximal degree in co-relation 10570. Up to 3686 conditions per place. [2024-05-12 13:18:54,251 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 56 selfloop transitions, 9 changer transitions 0/77 dead transitions. [2024-05-12 13:18:54,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 77 transitions, 408 flow [2024-05-12 13:18:54,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 13:18:54,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 13:18:54,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-05-12 13:18:54,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5346938775510204 [2024-05-12 13:18:54,253 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 201 flow. Second operand 5 states and 131 transitions. [2024-05-12 13:18:54,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 77 transitions, 408 flow [2024-05-12 13:18:54,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 77 transitions, 375 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-05-12 13:18:54,257 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 250 flow [2024-05-12 13:18:54,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=250, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2024-05-12 13:18:54,257 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 8 predicate places. [2024-05-12 13:18:54,257 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 250 flow [2024-05-12 13:18:54,258 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 13:18:54,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:18:54,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:18:54,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 13:18:54,258 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:18:54,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:18:54,259 INFO L85 PathProgramCache]: Analyzing trace with hash -81528725, now seen corresponding path program 1 times [2024-05-12 13:18:54,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:18:54,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110540524] [2024-05-12 13:18:54,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:18:54,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:18:54,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:18:55,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:18:55,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:18:55,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110540524] [2024-05-12 13:18:55,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110540524] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:18:55,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:18:55,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:18:55,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529803227] [2024-05-12 13:18:55,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:18:55,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:18:55,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:18:55,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:18:55,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:18:55,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:18:55,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 250 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 13:18:55,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:18:55,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:18:55,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:18:55,845 INFO L124 PetriNetUnfolderBase]: 3031/5057 cut-off events. [2024-05-12 13:18:55,845 INFO L125 PetriNetUnfolderBase]: For 5619/5619 co-relation queries the response was YES. [2024-05-12 13:18:55,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13240 conditions, 5057 events. 3031/5057 cut-off events. For 5619/5619 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 32038 event pairs, 1326 based on Foata normal form. 4/4921 useless extension candidates. Maximal degree in co-relation 13218. Up to 4319 conditions per place. [2024-05-12 13:18:55,873 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 70 selfloop transitions, 13 changer transitions 0/94 dead transitions. [2024-05-12 13:18:55,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 94 transitions, 521 flow [2024-05-12 13:18:55,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:18:55,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:18:55,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-05-12 13:18:55,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272108843537415 [2024-05-12 13:18:55,875 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 250 flow. Second operand 6 states and 155 transitions. [2024-05-12 13:18:55,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 94 transitions, 521 flow [2024-05-12 13:18:55,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 94 transitions, 504 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-05-12 13:18:55,879 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 323 flow [2024-05-12 13:18:55,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=323, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2024-05-12 13:18:55,880 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 13 predicate places. [2024-05-12 13:18:55,880 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 323 flow [2024-05-12 13:18:55,881 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 13:18:55,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:18:55,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:18:55,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 13:18:55,881 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:18:55,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:18:55,882 INFO L85 PathProgramCache]: Analyzing trace with hash -995577365, now seen corresponding path program 2 times [2024-05-12 13:18:55,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:18:55,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419037113] [2024-05-12 13:18:55,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:18:55,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:18:55,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:18:56,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:18:56,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:18:56,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419037113] [2024-05-12 13:18:56,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419037113] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:18:56,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:18:56,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:18:56,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728180984] [2024-05-12 13:18:56,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:18:56,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:18:56,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:18:56,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:18:56,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:18:56,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:18:56,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 323 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 13:18:56,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:18:56,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:18:56,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:18:57,347 INFO L124 PetriNetUnfolderBase]: 3054/5102 cut-off events. [2024-05-12 13:18:57,347 INFO L125 PetriNetUnfolderBase]: For 8522/8532 co-relation queries the response was YES. [2024-05-12 13:18:57,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14477 conditions, 5102 events. 3054/5102 cut-off events. For 8522/8532 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 32270 event pairs, 1260 based on Foata normal form. 12/4971 useless extension candidates. Maximal degree in co-relation 14452. Up to 4302 conditions per place. [2024-05-12 13:18:57,367 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 68 selfloop transitions, 18 changer transitions 0/97 dead transitions. [2024-05-12 13:18:57,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 97 transitions, 593 flow [2024-05-12 13:18:57,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:18:57,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:18:57,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-05-12 13:18:57,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5306122448979592 [2024-05-12 13:18:57,369 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 323 flow. Second operand 6 states and 156 transitions. [2024-05-12 13:18:57,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 97 transitions, 593 flow [2024-05-12 13:18:57,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 97 transitions, 562 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-05-12 13:18:57,374 INFO L231 Difference]: Finished difference. Result has 71 places, 70 transitions, 366 flow [2024-05-12 13:18:57,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=366, PETRI_PLACES=71, PETRI_TRANSITIONS=70} [2024-05-12 13:18:57,375 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 16 predicate places. [2024-05-12 13:18:57,376 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 70 transitions, 366 flow [2024-05-12 13:18:57,376 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 13:18:57,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:18:57,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:18:57,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 13:18:57,376 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:18:57,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:18:57,377 INFO L85 PathProgramCache]: Analyzing trace with hash -995568437, now seen corresponding path program 1 times [2024-05-12 13:18:57,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:18:57,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886056762] [2024-05-12 13:18:57,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:18:57,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:18:57,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:18:58,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:18:58,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:18:58,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886056762] [2024-05-12 13:18:58,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886056762] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:18:58,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:18:58,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:18:58,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477407090] [2024-05-12 13:18:58,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:18:58,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:18:58,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:18:58,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:18:58,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:18:58,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:18:58,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 366 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 13:18:58,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:18:58,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:18:58,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:18:59,368 INFO L124 PetriNetUnfolderBase]: 3252/5514 cut-off events. [2024-05-12 13:18:59,369 INFO L125 PetriNetUnfolderBase]: For 11660/11660 co-relation queries the response was YES. [2024-05-12 13:18:59,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16271 conditions, 5514 events. 3252/5514 cut-off events. For 11660/11660 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 35781 event pairs, 1326 based on Foata normal form. 2/5350 useless extension candidates. Maximal degree in co-relation 16245. Up to 4633 conditions per place. [2024-05-12 13:18:59,392 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 83 selfloop transitions, 15 changer transitions 0/109 dead transitions. [2024-05-12 13:18:59,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 109 transitions, 687 flow [2024-05-12 13:18:59,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:18:59,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:18:59,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-05-12 13:18:59,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5160349854227405 [2024-05-12 13:18:59,394 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 366 flow. Second operand 7 states and 177 transitions. [2024-05-12 13:18:59,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 109 transitions, 687 flow [2024-05-12 13:18:59,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 109 transitions, 634 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-05-12 13:18:59,400 INFO L231 Difference]: Finished difference. Result has 75 places, 76 transitions, 400 flow [2024-05-12 13:18:59,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=400, PETRI_PLACES=75, PETRI_TRANSITIONS=76} [2024-05-12 13:18:59,400 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 20 predicate places. [2024-05-12 13:18:59,400 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 76 transitions, 400 flow [2024-05-12 13:18:59,401 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 13:18:59,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:18:59,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:18:59,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 13:18:59,401 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:18:59,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:18:59,402 INFO L85 PathProgramCache]: Analyzing trace with hash -2015697051, now seen corresponding path program 1 times [2024-05-12 13:18:59,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:18:59,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187977331] [2024-05-12 13:18:59,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:18:59,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:18:59,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:19:00,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:19:00,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:19:00,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187977331] [2024-05-12 13:19:00,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187977331] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:19:00,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:19:00,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:19:00,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783752378] [2024-05-12 13:19:00,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:19:00,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:19:00,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:19:00,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:19:00,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:19:00,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:19:00,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 76 transitions, 400 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 13:19:00,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:19:00,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:19:00,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:19:01,338 INFO L124 PetriNetUnfolderBase]: 3597/5965 cut-off events. [2024-05-12 13:19:01,338 INFO L125 PetriNetUnfolderBase]: For 15821/15821 co-relation queries the response was YES. [2024-05-12 13:19:01,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18857 conditions, 5965 events. 3597/5965 cut-off events. For 15821/15821 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 38504 event pairs, 1401 based on Foata normal form. 2/5805 useless extension candidates. Maximal degree in co-relation 18829. Up to 5113 conditions per place. [2024-05-12 13:19:01,368 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 89 selfloop transitions, 17 changer transitions 0/118 dead transitions. [2024-05-12 13:19:01,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 118 transitions, 752 flow [2024-05-12 13:19:01,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:19:01,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:19:01,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-05-12 13:19:01,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5276967930029155 [2024-05-12 13:19:01,369 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 400 flow. Second operand 7 states and 181 transitions. [2024-05-12 13:19:01,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 118 transitions, 752 flow [2024-05-12 13:19:01,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 118 transitions, 712 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-05-12 13:19:01,376 INFO L231 Difference]: Finished difference. Result has 79 places, 83 transitions, 473 flow [2024-05-12 13:19:01,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=473, PETRI_PLACES=79, PETRI_TRANSITIONS=83} [2024-05-12 13:19:01,377 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 24 predicate places. [2024-05-12 13:19:01,377 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 83 transitions, 473 flow [2024-05-12 13:19:01,377 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 13:19:01,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:19:01,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:19:01,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 13:19:01,378 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:19:01,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:19:01,378 INFO L85 PathProgramCache]: Analyzing trace with hash -797848760, now seen corresponding path program 1 times [2024-05-12 13:19:01,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:19:01,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154403156] [2024-05-12 13:19:01,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:19:01,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:19:01,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:19:02,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:19:02,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:19:02,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154403156] [2024-05-12 13:19:02,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154403156] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:19:02,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:19:02,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:19:02,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361000880] [2024-05-12 13:19:02,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:19:02,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:19:02,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:19:02,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:19:02,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:19:02,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:19:02,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 83 transitions, 473 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:19:02,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:19:02,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:19:02,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:19:03,310 INFO L124 PetriNetUnfolderBase]: 3244/5425 cut-off events. [2024-05-12 13:19:03,310 INFO L125 PetriNetUnfolderBase]: For 18063/18063 co-relation queries the response was YES. [2024-05-12 13:19:03,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17923 conditions, 5425 events. 3244/5425 cut-off events. For 18063/18063 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 34589 event pairs, 1214 based on Foata normal form. 4/5286 useless extension candidates. Maximal degree in co-relation 17893. Up to 4574 conditions per place. [2024-05-12 13:19:03,340 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 98 selfloop transitions, 28 changer transitions 0/137 dead transitions. [2024-05-12 13:19:03,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 137 transitions, 969 flow [2024-05-12 13:19:03,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:19:03,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:19:03,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-05-12 13:19:03,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-05-12 13:19:03,342 INFO L175 Difference]: Start difference. First operand has 79 places, 83 transitions, 473 flow. Second operand 8 states and 203 transitions. [2024-05-12 13:19:03,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 137 transitions, 969 flow [2024-05-12 13:19:03,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 137 transitions, 914 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-05-12 13:19:03,350 INFO L231 Difference]: Finished difference. Result has 86 places, 94 transitions, 638 flow [2024-05-12 13:19:03,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=638, PETRI_PLACES=86, PETRI_TRANSITIONS=94} [2024-05-12 13:19:03,352 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 31 predicate places. [2024-05-12 13:19:03,352 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 94 transitions, 638 flow [2024-05-12 13:19:03,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:19:03,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:19:03,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:19:03,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-05-12 13:19:03,353 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:19:03,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:19:03,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1901185240, now seen corresponding path program 1 times [2024-05-12 13:19:03,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:19:03,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720479614] [2024-05-12 13:19:03,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:19:03,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:19:03,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:19:04,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:19:04,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:19:04,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720479614] [2024-05-12 13:19:04,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720479614] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:19:04,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:19:04,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 13:19:04,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727604153] [2024-05-12 13:19:04,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:19:04,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 13:19:04,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:19:04,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 13:19:04,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-05-12 13:19:04,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:19:04,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 94 transitions, 638 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:19:04,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:19:04,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:19:04,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:19:04,694 INFO L124 PetriNetUnfolderBase]: 3241/5489 cut-off events. [2024-05-12 13:19:04,695 INFO L125 PetriNetUnfolderBase]: For 22674/22674 co-relation queries the response was YES. [2024-05-12 13:19:04,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19161 conditions, 5489 events. 3241/5489 cut-off events. For 22674/22674 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 35475 event pairs, 1312 based on Foata normal form. 1/5319 useless extension candidates. Maximal degree in co-relation 19127. Up to 4653 conditions per place. [2024-05-12 13:19:04,725 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 90 selfloop transitions, 11 changer transitions 0/112 dead transitions. [2024-05-12 13:19:04,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 112 transitions, 900 flow [2024-05-12 13:19:04,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 13:19:04,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 13:19:04,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-05-12 13:19:04,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5061224489795918 [2024-05-12 13:19:04,726 INFO L175 Difference]: Start difference. First operand has 86 places, 94 transitions, 638 flow. Second operand 5 states and 124 transitions. [2024-05-12 13:19:04,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 112 transitions, 900 flow [2024-05-12 13:19:04,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 112 transitions, 807 flow, removed 42 selfloop flow, removed 2 redundant places. [2024-05-12 13:19:04,745 INFO L231 Difference]: Finished difference. Result has 89 places, 97 transitions, 600 flow [2024-05-12 13:19:04,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=545, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=600, PETRI_PLACES=89, PETRI_TRANSITIONS=97} [2024-05-12 13:19:04,746 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 34 predicate places. [2024-05-12 13:19:04,746 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 97 transitions, 600 flow [2024-05-12 13:19:04,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:19:04,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:19:04,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:19:04,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-05-12 13:19:04,747 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:19:04,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:19:04,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1941657170, now seen corresponding path program 1 times [2024-05-12 13:19:04,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:19:04,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658204589] [2024-05-12 13:19:04,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:19:04,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:19:04,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:19:05,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:19:05,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:19:05,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658204589] [2024-05-12 13:19:05,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658204589] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:19:05,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:19:05,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:19:05,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551178838] [2024-05-12 13:19:05,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:19:05,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:19:05,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:19:05,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:19:05,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:19:06,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:19:06,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 97 transitions, 600 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 13:19:06,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:19:06,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:19:06,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:19:07,025 INFO L124 PetriNetUnfolderBase]: 3797/6247 cut-off events. [2024-05-12 13:19:07,025 INFO L125 PetriNetUnfolderBase]: For 28570/28570 co-relation queries the response was YES. [2024-05-12 13:19:07,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22414 conditions, 6247 events. 3797/6247 cut-off events. For 28570/28570 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 39563 event pairs, 1441 based on Foata normal form. 2/6093 useless extension candidates. Maximal degree in co-relation 22378. Up to 5363 conditions per place. [2024-05-12 13:19:07,069 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 117 selfloop transitions, 26 changer transitions 0/153 dead transitions. [2024-05-12 13:19:07,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 153 transitions, 1112 flow [2024-05-12 13:19:07,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:19:07,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:19:07,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-05-12 13:19:07,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5076530612244898 [2024-05-12 13:19:07,071 INFO L175 Difference]: Start difference. First operand has 89 places, 97 transitions, 600 flow. Second operand 8 states and 199 transitions. [2024-05-12 13:19:07,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 153 transitions, 1112 flow [2024-05-12 13:19:07,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 153 transitions, 1081 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-05-12 13:19:07,092 INFO L231 Difference]: Finished difference. Result has 96 places, 109 transitions, 762 flow [2024-05-12 13:19:07,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=762, PETRI_PLACES=96, PETRI_TRANSITIONS=109} [2024-05-12 13:19:07,094 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 41 predicate places. [2024-05-12 13:19:07,094 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 109 transitions, 762 flow [2024-05-12 13:19:07,094 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 13:19:07,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:19:07,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:19:07,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-05-12 13:19:07,095 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:19:07,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:19:07,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1036186380, now seen corresponding path program 2 times [2024-05-12 13:19:07,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:19:07,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31897021] [2024-05-12 13:19:07,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:19:07,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:19:07,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:19:08,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:19:08,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:19:08,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31897021] [2024-05-12 13:19:08,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31897021] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:19:08,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:19:08,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:19:08,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261510330] [2024-05-12 13:19:08,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:19:08,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:19:08,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:19:08,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:19:08,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:19:08,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:19:08,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 109 transitions, 762 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 13:19:08,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:19:08,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:19:08,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:19:09,462 INFO L124 PetriNetUnfolderBase]: 3889/6384 cut-off events. [2024-05-12 13:19:09,462 INFO L125 PetriNetUnfolderBase]: For 35425/35440 co-relation queries the response was YES. [2024-05-12 13:19:09,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24549 conditions, 6384 events. 3889/6384 cut-off events. For 35425/35440 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 40275 event pairs, 1389 based on Foata normal form. 16/6231 useless extension candidates. Maximal degree in co-relation 24510. Up to 5302 conditions per place. [2024-05-12 13:19:09,524 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 122 selfloop transitions, 36 changer transitions 0/168 dead transitions. [2024-05-12 13:19:09,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 168 transitions, 1318 flow [2024-05-12 13:19:09,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:19:09,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:19:09,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-05-12 13:19:09,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5153061224489796 [2024-05-12 13:19:09,541 INFO L175 Difference]: Start difference. First operand has 96 places, 109 transitions, 762 flow. Second operand 8 states and 202 transitions. [2024-05-12 13:19:09,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 168 transitions, 1318 flow [2024-05-12 13:19:09,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 168 transitions, 1207 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-05-12 13:19:09,600 INFO L231 Difference]: Finished difference. Result has 101 places, 122 transitions, 855 flow [2024-05-12 13:19:09,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=665, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=855, PETRI_PLACES=101, PETRI_TRANSITIONS=122} [2024-05-12 13:19:09,602 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 46 predicate places. [2024-05-12 13:19:09,602 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 122 transitions, 855 flow [2024-05-12 13:19:09,603 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 13:19:09,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:19:09,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:19:09,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-05-12 13:19:09,603 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:19:09,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:19:09,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1028151180, now seen corresponding path program 3 times [2024-05-12 13:19:09,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:19:09,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224201054] [2024-05-12 13:19:09,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:19:09,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:19:09,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:19:10,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:19:10,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:19:10,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224201054] [2024-05-12 13:19:10,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224201054] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:19:10,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:19:10,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:19:10,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980728777] [2024-05-12 13:19:10,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:19:10,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:19:10,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:19:10,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:19:10,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:19:10,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:19:10,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 122 transitions, 855 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 13:19:10,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:19:10,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:19:10,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:19:11,756 INFO L124 PetriNetUnfolderBase]: 3912/6055 cut-off events. [2024-05-12 13:19:11,756 INFO L125 PetriNetUnfolderBase]: For 41003/41018 co-relation queries the response was YES. [2024-05-12 13:19:11,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25755 conditions, 6055 events. 3912/6055 cut-off events. For 41003/41018 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 35434 event pairs, 1316 based on Foata normal form. 14/6016 useless extension candidates. Maximal degree in co-relation 25714. Up to 5349 conditions per place. [2024-05-12 13:19:11,795 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 116 selfloop transitions, 60 changer transitions 0/186 dead transitions. [2024-05-12 13:19:11,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 186 transitions, 1616 flow [2024-05-12 13:19:11,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:19:11,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:19:11,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-05-12 13:19:11,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5153061224489796 [2024-05-12 13:19:11,797 INFO L175 Difference]: Start difference. First operand has 101 places, 122 transitions, 855 flow. Second operand 8 states and 202 transitions. [2024-05-12 13:19:11,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 186 transitions, 1616 flow [2024-05-12 13:19:11,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 186 transitions, 1510 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-05-12 13:19:11,829 INFO L231 Difference]: Finished difference. Result has 109 places, 142 transitions, 1205 flow [2024-05-12 13:19:11,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=781, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1205, PETRI_PLACES=109, PETRI_TRANSITIONS=142} [2024-05-12 13:19:11,829 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 54 predicate places. [2024-05-12 13:19:11,829 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 142 transitions, 1205 flow [2024-05-12 13:19:11,830 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 13:19:11,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:19:11,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:19:11,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-05-12 13:19:11,830 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:19:11,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:19:11,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1027912170, now seen corresponding path program 4 times [2024-05-12 13:19:11,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:19:11,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353497453] [2024-05-12 13:19:11,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:19:11,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:19:11,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:19:12,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:19:12,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:19:12,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353497453] [2024-05-12 13:19:12,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353497453] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:19:12,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:19:12,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:19:12,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572795352] [2024-05-12 13:19:12,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:19:12,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:19:12,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:19:12,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:19:12,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:19:13,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:19:13,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 142 transitions, 1205 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 13:19:13,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:19:13,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:19:13,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:19:13,947 INFO L124 PetriNetUnfolderBase]: 3917/6066 cut-off events. [2024-05-12 13:19:13,948 INFO L125 PetriNetUnfolderBase]: For 48616/48631 co-relation queries the response was YES. [2024-05-12 13:19:13,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27417 conditions, 6066 events. 3917/6066 cut-off events. For 48616/48631 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 35545 event pairs, 1318 based on Foata normal form. 14/6026 useless extension candidates. Maximal degree in co-relation 27372. Up to 5432 conditions per place. [2024-05-12 13:19:13,991 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 132 selfloop transitions, 48 changer transitions 0/190 dead transitions. [2024-05-12 13:19:13,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 190 transitions, 1788 flow [2024-05-12 13:19:13,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:19:13,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:19:13,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-05-12 13:19:13,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2024-05-12 13:19:13,993 INFO L175 Difference]: Start difference. First operand has 109 places, 142 transitions, 1205 flow. Second operand 8 states and 200 transitions. [2024-05-12 13:19:13,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 190 transitions, 1788 flow [2024-05-12 13:19:14,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 190 transitions, 1655 flow, removed 60 selfloop flow, removed 2 redundant places. [2024-05-12 13:19:14,060 INFO L231 Difference]: Finished difference. Result has 115 places, 148 transitions, 1286 flow [2024-05-12 13:19:14,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1102, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1286, PETRI_PLACES=115, PETRI_TRANSITIONS=148} [2024-05-12 13:19:14,062 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 60 predicate places. [2024-05-12 13:19:14,062 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 148 transitions, 1286 flow [2024-05-12 13:19:14,062 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 13:19:14,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:19:14,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:19:14,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-05-12 13:19:14,062 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:19:14,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:19:14,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1192800943, now seen corresponding path program 1 times [2024-05-12 13:19:14,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:19:14,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502868266] [2024-05-12 13:19:14,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:19:14,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:19:14,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:19:14,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:19:14,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:19:14,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502868266] [2024-05-12 13:19:14,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502868266] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:19:14,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:19:14,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:19:14,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828060675] [2024-05-12 13:19:14,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:19:14,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:19:14,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:19:14,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:19:14,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:19:14,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:19:14,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 148 transitions, 1286 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:19:14,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:19:14,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:19:14,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:19:15,724 INFO L124 PetriNetUnfolderBase]: 3914/6245 cut-off events. [2024-05-12 13:19:15,724 INFO L125 PetriNetUnfolderBase]: For 46725/46725 co-relation queries the response was YES. [2024-05-12 13:19:15,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26816 conditions, 6245 events. 3914/6245 cut-off events. For 46725/46725 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 38265 event pairs, 1462 based on Foata normal form. 1/6144 useless extension candidates. Maximal degree in co-relation 26769. Up to 5584 conditions per place. [2024-05-12 13:19:15,859 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 147 selfloop transitions, 14 changer transitions 0/171 dead transitions. [2024-05-12 13:19:15,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 171 transitions, 1688 flow [2024-05-12 13:19:15,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:19:15,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:19:15,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-05-12 13:19:15,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47959183673469385 [2024-05-12 13:19:15,861 INFO L175 Difference]: Start difference. First operand has 115 places, 148 transitions, 1286 flow. Second operand 6 states and 141 transitions. [2024-05-12 13:19:15,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 171 transitions, 1688 flow [2024-05-12 13:19:15,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 171 transitions, 1521 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-05-12 13:19:15,894 INFO L231 Difference]: Finished difference. Result has 114 places, 151 transitions, 1183 flow [2024-05-12 13:19:15,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1119, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1183, PETRI_PLACES=114, PETRI_TRANSITIONS=151} [2024-05-12 13:19:15,895 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 59 predicate places. [2024-05-12 13:19:15,895 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 151 transitions, 1183 flow [2024-05-12 13:19:15,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:19:15,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:19:15,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:19:15,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-05-12 13:19:15,895 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:19:15,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:19:15,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1925025524, now seen corresponding path program 1 times [2024-05-12 13:19:15,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:19:15,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168571765] [2024-05-12 13:19:15,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:19:15,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:19:15,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:19:16,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:19:16,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:19:16,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168571765] [2024-05-12 13:19:16,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168571765] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:19:16,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:19:16,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:19:16,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001051147] [2024-05-12 13:19:16,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:19:16,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:19:16,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:19:16,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:19:16,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:19:17,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:19:17,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 151 transitions, 1183 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:19:17,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:19:17,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:19:17,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:19:18,075 INFO L124 PetriNetUnfolderBase]: 3993/6517 cut-off events. [2024-05-12 13:19:18,076 INFO L125 PetriNetUnfolderBase]: For 60169/60179 co-relation queries the response was YES. [2024-05-12 13:19:18,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29205 conditions, 6517 events. 3993/6517 cut-off events. For 60169/60179 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 41757 event pairs, 1046 based on Foata normal form. 14/6377 useless extension candidates. Maximal degree in co-relation 29160. Up to 5559 conditions per place. [2024-05-12 13:19:18,122 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 161 selfloop transitions, 19 changer transitions 0/199 dead transitions. [2024-05-12 13:19:18,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 199 transitions, 1707 flow [2024-05-12 13:19:18,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:19:18,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:19:18,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-05-12 13:19:18,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5229591836734694 [2024-05-12 13:19:18,125 INFO L175 Difference]: Start difference. First operand has 114 places, 151 transitions, 1183 flow. Second operand 8 states and 205 transitions. [2024-05-12 13:19:18,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 199 transitions, 1707 flow [2024-05-12 13:19:18,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 199 transitions, 1665 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-05-12 13:19:18,199 INFO L231 Difference]: Finished difference. Result has 119 places, 156 transitions, 1256 flow [2024-05-12 13:19:18,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1141, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1256, PETRI_PLACES=119, PETRI_TRANSITIONS=156} [2024-05-12 13:19:18,200 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 64 predicate places. [2024-05-12 13:19:18,200 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 156 transitions, 1256 flow [2024-05-12 13:19:18,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:19:18,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:19:18,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:19:18,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-05-12 13:19:18,201 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:19:18,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:19:18,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1922138804, now seen corresponding path program 2 times [2024-05-12 13:19:18,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:19:18,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396974281] [2024-05-12 13:19:18,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:19:18,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:19:18,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:19:19,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:19:19,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:19:19,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396974281] [2024-05-12 13:19:19,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396974281] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:19:19,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:19:19,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:19:19,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251706146] [2024-05-12 13:19:19,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:19:19,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:19:19,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:19:19,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:19:19,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:19:19,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:19:19,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 156 transitions, 1256 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:19:19,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:19:19,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:19:19,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:19:20,510 INFO L124 PetriNetUnfolderBase]: 3965/6364 cut-off events. [2024-05-12 13:19:20,510 INFO L125 PetriNetUnfolderBase]: For 67570/67580 co-relation queries the response was YES. [2024-05-12 13:19:20,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29970 conditions, 6364 events. 3965/6364 cut-off events. For 67570/67580 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 40155 event pairs, 1286 based on Foata normal form. 14/6249 useless extension candidates. Maximal degree in co-relation 29923. Up to 5543 conditions per place. [2024-05-12 13:19:20,557 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 164 selfloop transitions, 19 changer transitions 0/202 dead transitions. [2024-05-12 13:19:20,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 202 transitions, 1786 flow [2024-05-12 13:19:20,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:19:20,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:19:20,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-05-12 13:19:20,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5255102040816326 [2024-05-12 13:19:20,559 INFO L175 Difference]: Start difference. First operand has 119 places, 156 transitions, 1256 flow. Second operand 8 states and 206 transitions. [2024-05-12 13:19:20,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 202 transitions, 1786 flow [2024-05-12 13:19:20,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 202 transitions, 1713 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-05-12 13:19:20,609 INFO L231 Difference]: Finished difference. Result has 122 places, 158 transitions, 1276 flow [2024-05-12 13:19:20,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1183, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1276, PETRI_PLACES=122, PETRI_TRANSITIONS=158} [2024-05-12 13:19:20,609 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 67 predicate places. [2024-05-12 13:19:20,609 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 158 transitions, 1276 flow [2024-05-12 13:19:20,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:19:20,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:19:20,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:19:20,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-05-12 13:19:20,610 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:19:20,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:19:20,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1922132852, now seen corresponding path program 1 times [2024-05-12 13:19:20,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:19:20,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226233234] [2024-05-12 13:19:20,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:19:20,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:19:20,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:19:21,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:19:21,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:19:21,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226233234] [2024-05-12 13:19:21,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226233234] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:19:21,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:19:21,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:19:21,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415251791] [2024-05-12 13:19:21,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:19:21,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:19:21,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:19:21,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:19:21,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:19:22,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:19:22,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 158 transitions, 1276 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:19:22,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:19:22,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:19:22,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:19:23,251 INFO L124 PetriNetUnfolderBase]: 4278/6763 cut-off events. [2024-05-12 13:19:23,251 INFO L125 PetriNetUnfolderBase]: For 75611/75611 co-relation queries the response was YES. [2024-05-12 13:19:23,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31736 conditions, 6763 events. 4278/6763 cut-off events. For 75611/75611 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 41735 event pairs, 1341 based on Foata normal form. 2/6637 useless extension candidates. Maximal degree in co-relation 31688. Up to 5993 conditions per place. [2024-05-12 13:19:23,296 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 182 selfloop transitions, 31 changer transitions 0/224 dead transitions. [2024-05-12 13:19:23,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 224 transitions, 2041 flow [2024-05-12 13:19:23,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:19:23,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:19:23,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 240 transitions. [2024-05-12 13:19:23,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2024-05-12 13:19:23,298 INFO L175 Difference]: Start difference. First operand has 122 places, 158 transitions, 1276 flow. Second operand 10 states and 240 transitions. [2024-05-12 13:19:23,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 224 transitions, 2041 flow [2024-05-12 13:19:23,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 224 transitions, 1963 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-05-12 13:19:23,350 INFO L231 Difference]: Finished difference. Result has 129 places, 172 transitions, 1496 flow [2024-05-12 13:19:23,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1201, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1496, PETRI_PLACES=129, PETRI_TRANSITIONS=172} [2024-05-12 13:19:23,350 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 74 predicate places. [2024-05-12 13:19:23,350 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 172 transitions, 1496 flow [2024-05-12 13:19:23,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:19:23,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:19:23,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:19:23,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-05-12 13:19:23,351 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:19:23,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:19:23,352 INFO L85 PathProgramCache]: Analyzing trace with hash 61616360, now seen corresponding path program 3 times [2024-05-12 13:19:23,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:19:23,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030957243] [2024-05-12 13:19:23,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:19:23,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:19:23,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:19:24,450 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 13:19:24,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:19:24,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030957243] [2024-05-12 13:19:24,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030957243] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:19:24,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:19:24,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:19:24,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043053770] [2024-05-12 13:19:24,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:19:24,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:19:24,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:19:24,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:19:24,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:19:24,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:19:24,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 172 transitions, 1496 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:19:24,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:19:24,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:19:24,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:19:25,702 INFO L124 PetriNetUnfolderBase]: 4073/6519 cut-off events. [2024-05-12 13:19:25,702 INFO L125 PetriNetUnfolderBase]: For 88795/88805 co-relation queries the response was YES. [2024-05-12 13:19:25,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32666 conditions, 6519 events. 4073/6519 cut-off events. For 88795/88805 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 41080 event pairs, 1226 based on Foata normal form. 18/6412 useless extension candidates. Maximal degree in co-relation 32614. Up to 5659 conditions per place. [2024-05-12 13:19:25,752 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 177 selfloop transitions, 22 changer transitions 0/219 dead transitions. [2024-05-12 13:19:25,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 219 transitions, 2085 flow [2024-05-12 13:19:25,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:19:25,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:19:25,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-05-12 13:19:25,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5204081632653061 [2024-05-12 13:19:25,754 INFO L175 Difference]: Start difference. First operand has 129 places, 172 transitions, 1496 flow. Second operand 8 states and 204 transitions. [2024-05-12 13:19:25,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 219 transitions, 2085 flow [2024-05-12 13:19:25,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 219 transitions, 1930 flow, removed 69 selfloop flow, removed 4 redundant places. [2024-05-12 13:19:25,837 INFO L231 Difference]: Finished difference. Result has 134 places, 176 transitions, 1474 flow [2024-05-12 13:19:25,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1341, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1474, PETRI_PLACES=134, PETRI_TRANSITIONS=176} [2024-05-12 13:19:25,838 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 79 predicate places. [2024-05-12 13:19:25,838 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 176 transitions, 1474 flow [2024-05-12 13:19:25,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:19:25,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:19:25,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:19:25,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-05-12 13:19:25,839 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:19:25,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:19:25,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1805947952, now seen corresponding path program 2 times [2024-05-12 13:19:25,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:19:25,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752480540] [2024-05-12 13:19:25,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:19:25,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:19:25,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:19:27,100 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 13:19:27,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:19:27,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752480540] [2024-05-12 13:19:27,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752480540] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:19:27,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:19:27,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:19:27,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288956255] [2024-05-12 13:19:27,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:19:27,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:19:27,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:19:27,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:19:27,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:19:27,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:19:27,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 176 transitions, 1474 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:19:27,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:19:27,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:19:27,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:19:28,351 INFO L124 PetriNetUnfolderBase]: 4393/6948 cut-off events. [2024-05-12 13:19:28,351 INFO L125 PetriNetUnfolderBase]: For 95762/95762 co-relation queries the response was YES. [2024-05-12 13:19:28,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34580 conditions, 6948 events. 4393/6948 cut-off events. For 95762/95762 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 43020 event pairs, 1350 based on Foata normal form. 2/6822 useless extension candidates. Maximal degree in co-relation 34525. Up to 6138 conditions per place. [2024-05-12 13:19:28,403 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 195 selfloop transitions, 27 changer transitions 0/233 dead transitions. [2024-05-12 13:19:28,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 233 transitions, 2159 flow [2024-05-12 13:19:28,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:19:28,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:19:28,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-05-12 13:19:28,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5056689342403629 [2024-05-12 13:19:28,404 INFO L175 Difference]: Start difference. First operand has 134 places, 176 transitions, 1474 flow. Second operand 9 states and 223 transitions. [2024-05-12 13:19:28,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 233 transitions, 2159 flow [2024-05-12 13:19:28,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 233 transitions, 2060 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-05-12 13:19:28,491 INFO L231 Difference]: Finished difference. Result has 139 places, 183 transitions, 1546 flow [2024-05-12 13:19:28,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1384, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1546, PETRI_PLACES=139, PETRI_TRANSITIONS=183} [2024-05-12 13:19:28,491 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 84 predicate places. [2024-05-12 13:19:28,492 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 183 transitions, 1546 flow [2024-05-12 13:19:28,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:19:28,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:19:28,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:19:28,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-05-12 13:19:28,492 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:19:28,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:19:28,493 INFO L85 PathProgramCache]: Analyzing trace with hash 61831562, now seen corresponding path program 3 times [2024-05-12 13:19:28,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:19:28,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217537368] [2024-05-12 13:19:28,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:19:28,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:19:28,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:19:29,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:19:29,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:19:29,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217537368] [2024-05-12 13:19:29,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217537368] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:19:29,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:19:29,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:19:29,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021967355] [2024-05-12 13:19:29,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:19:29,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:19:29,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:19:29,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:19:29,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:19:29,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:19:29,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 183 transitions, 1546 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:19:29,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:19:29,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:19:29,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:19:31,005 INFO L124 PetriNetUnfolderBase]: 4459/7051 cut-off events. [2024-05-12 13:19:31,005 INFO L125 PetriNetUnfolderBase]: For 104277/104277 co-relation queries the response was YES. [2024-05-12 13:19:31,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35902 conditions, 7051 events. 4459/7051 cut-off events. For 104277/104277 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 43745 event pairs, 1320 based on Foata normal form. 2/6924 useless extension candidates. Maximal degree in co-relation 35845. Up to 6070 conditions per place. [2024-05-12 13:19:31,062 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 168 selfloop transitions, 70 changer transitions 0/249 dead transitions. [2024-05-12 13:19:31,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 249 transitions, 2520 flow [2024-05-12 13:19:31,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:19:31,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:19:31,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-05-12 13:19:31,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192743764172335 [2024-05-12 13:19:31,063 INFO L175 Difference]: Start difference. First operand has 139 places, 183 transitions, 1546 flow. Second operand 9 states and 229 transitions. [2024-05-12 13:19:31,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 249 transitions, 2520 flow [2024-05-12 13:19:31,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 249 transitions, 2392 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-05-12 13:19:31,154 INFO L231 Difference]: Finished difference. Result has 143 places, 195 transitions, 1886 flow [2024-05-12 13:19:31,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1428, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1886, PETRI_PLACES=143, PETRI_TRANSITIONS=195} [2024-05-12 13:19:31,154 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 88 predicate places. [2024-05-12 13:19:31,155 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 195 transitions, 1886 flow [2024-05-12 13:19:31,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:19:31,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:19:31,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:19:31,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-05-12 13:19:31,155 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:19:31,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:19:31,156 INFO L85 PathProgramCache]: Analyzing trace with hash 61831841, now seen corresponding path program 1 times [2024-05-12 13:19:31,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:19:31,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792035279] [2024-05-12 13:19:31,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:19:31,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:19:31,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:19:32,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:19:32,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:19:32,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792035279] [2024-05-12 13:19:32,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792035279] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:19:32,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:19:32,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:19:32,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636311525] [2024-05-12 13:19:32,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:19:32,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:19:32,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:19:32,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:19:32,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:19:32,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:19:32,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 195 transitions, 1886 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:19:32,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:19:32,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:19:32,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:19:33,395 INFO L124 PetriNetUnfolderBase]: 4499/7151 cut-off events. [2024-05-12 13:19:33,395 INFO L125 PetriNetUnfolderBase]: For 114598/114598 co-relation queries the response was YES. [2024-05-12 13:19:33,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37264 conditions, 7151 events. 4499/7151 cut-off events. For 114598/114598 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 44757 event pairs, 1347 based on Foata normal form. 4/7014 useless extension candidates. Maximal degree in co-relation 37205. Up to 6293 conditions per place. [2024-05-12 13:19:33,451 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 208 selfloop transitions, 31 changer transitions 0/250 dead transitions. [2024-05-12 13:19:33,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 250 transitions, 2560 flow [2024-05-12 13:19:33,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:19:33,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:19:33,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-05-12 13:19:33,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5056689342403629 [2024-05-12 13:19:33,452 INFO L175 Difference]: Start difference. First operand has 143 places, 195 transitions, 1886 flow. Second operand 9 states and 223 transitions. [2024-05-12 13:19:33,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 250 transitions, 2560 flow [2024-05-12 13:19:33,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 250 transitions, 2392 flow, removed 72 selfloop flow, removed 3 redundant places. [2024-05-12 13:19:33,597 INFO L231 Difference]: Finished difference. Result has 149 places, 197 transitions, 1833 flow [2024-05-12 13:19:33,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1720, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1833, PETRI_PLACES=149, PETRI_TRANSITIONS=197} [2024-05-12 13:19:33,597 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 94 predicate places. [2024-05-12 13:19:33,598 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 197 transitions, 1833 flow [2024-05-12 13:19:33,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:19:33,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:19:33,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:19:33,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-05-12 13:19:33,598 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:19:33,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:19:33,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1805746142, now seen corresponding path program 4 times [2024-05-12 13:19:33,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:19:33,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857534689] [2024-05-12 13:19:33,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:19:33,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:19:33,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:19:34,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:19:34,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:19:34,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857534689] [2024-05-12 13:19:34,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857534689] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:19:34,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:19:34,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:19:34,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281566918] [2024-05-12 13:19:34,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:19:34,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:19:34,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:19:34,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:19:34,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:19:35,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:19:35,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 197 transitions, 1833 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:19:35,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:19:35,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:19:35,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:19:36,205 INFO L124 PetriNetUnfolderBase]: 4491/7111 cut-off events. [2024-05-12 13:19:36,205 INFO L125 PetriNetUnfolderBase]: For 112153/112153 co-relation queries the response was YES. [2024-05-12 13:19:36,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36757 conditions, 7111 events. 4491/7111 cut-off events. For 112153/112153 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 44232 event pairs, 1366 based on Foata normal form. 2/6981 useless extension candidates. Maximal degree in co-relation 36696. Up to 6278 conditions per place. [2024-05-12 13:19:36,261 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 212 selfloop transitions, 27 changer transitions 0/250 dead transitions. [2024-05-12 13:19:36,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 250 transitions, 2527 flow [2024-05-12 13:19:36,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:19:36,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:19:36,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-05-12 13:19:36,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5056689342403629 [2024-05-12 13:19:36,263 INFO L175 Difference]: Start difference. First operand has 149 places, 197 transitions, 1833 flow. Second operand 9 states and 223 transitions. [2024-05-12 13:19:36,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 250 transitions, 2527 flow [2024-05-12 13:19:36,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 250 transitions, 2356 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-05-12 13:19:36,374 INFO L231 Difference]: Finished difference. Result has 151 places, 200 transitions, 1798 flow [2024-05-12 13:19:36,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1700, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1798, PETRI_PLACES=151, PETRI_TRANSITIONS=200} [2024-05-12 13:19:36,375 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 96 predicate places. [2024-05-12 13:19:36,375 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 200 transitions, 1798 flow [2024-05-12 13:19:36,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:19:36,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:19:36,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:19:36,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-05-12 13:19:36,375 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:19:36,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:19:36,376 INFO L85 PathProgramCache]: Analyzing trace with hash 418544053, now seen corresponding path program 1 times [2024-05-12 13:19:36,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:19:36,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405064689] [2024-05-12 13:19:36,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:19:36,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:19:36,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:19:37,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:19:37,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:19:37,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405064689] [2024-05-12 13:19:37,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405064689] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:19:37,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:19:37,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:19:37,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133658942] [2024-05-12 13:19:37,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:19:37,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:19:37,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:19:37,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:19:37,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:19:37,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:19:37,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 200 transitions, 1798 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:19:37,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:19:37,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:19:37,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:19:38,233 INFO L124 PetriNetUnfolderBase]: 4553/7218 cut-off events. [2024-05-12 13:19:38,233 INFO L125 PetriNetUnfolderBase]: For 115351/115351 co-relation queries the response was YES. [2024-05-12 13:19:38,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37093 conditions, 7218 events. 4553/7218 cut-off events. For 115351/115351 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 45042 event pairs, 1377 based on Foata normal form. 2/7080 useless extension candidates. Maximal degree in co-relation 37031. Up to 6356 conditions per place. [2024-05-12 13:19:38,293 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 197 selfloop transitions, 28 changer transitions 0/236 dead transitions. [2024-05-12 13:19:38,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 236 transitions, 2462 flow [2024-05-12 13:19:38,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:19:38,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:19:38,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-05-12 13:19:38,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170068027210885 [2024-05-12 13:19:38,294 INFO L175 Difference]: Start difference. First operand has 151 places, 200 transitions, 1798 flow. Second operand 6 states and 152 transitions. [2024-05-12 13:19:38,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 236 transitions, 2462 flow [2024-05-12 13:19:38,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 236 transitions, 2412 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-05-12 13:19:38,386 INFO L231 Difference]: Finished difference. Result has 153 places, 206 transitions, 1884 flow [2024-05-12 13:19:38,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1748, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1884, PETRI_PLACES=153, PETRI_TRANSITIONS=206} [2024-05-12 13:19:38,386 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 98 predicate places. [2024-05-12 13:19:38,386 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 206 transitions, 1884 flow [2024-05-12 13:19:38,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:19:38,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:19:38,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:19:38,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-05-12 13:19:38,387 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:19:38,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:19:38,387 INFO L85 PathProgramCache]: Analyzing trace with hash 605671090, now seen corresponding path program 4 times [2024-05-12 13:19:38,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:19:38,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172013003] [2024-05-12 13:19:38,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:19:38,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:19:38,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:19:39,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:19:39,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:19:39,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172013003] [2024-05-12 13:19:39,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172013003] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:19:39,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:19:39,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:19:39,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936501206] [2024-05-12 13:19:39,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:19:39,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:19:39,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:19:39,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:19:39,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:19:39,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:19:39,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 206 transitions, 1884 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:19:39,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:19:39,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:19:39,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:19:40,650 INFO L124 PetriNetUnfolderBase]: 4260/6818 cut-off events. [2024-05-12 13:19:40,651 INFO L125 PetriNetUnfolderBase]: For 124587/124602 co-relation queries the response was YES. [2024-05-12 13:19:40,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36756 conditions, 6818 events. 4260/6818 cut-off events. For 124587/124602 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 42989 event pairs, 1169 based on Foata normal form. 20/6701 useless extension candidates. Maximal degree in co-relation 36693. Up to 5788 conditions per place. [2024-05-12 13:19:40,709 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 188 selfloop transitions, 43 changer transitions 0/253 dead transitions. [2024-05-12 13:19:40,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 253 transitions, 2548 flow [2024-05-12 13:19:40,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:19:40,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:19:40,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-05-12 13:19:40,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5229591836734694 [2024-05-12 13:19:40,711 INFO L175 Difference]: Start difference. First operand has 153 places, 206 transitions, 1884 flow. Second operand 8 states and 205 transitions. [2024-05-12 13:19:40,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 253 transitions, 2548 flow [2024-05-12 13:19:40,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 253 transitions, 2514 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-05-12 13:19:40,811 INFO L231 Difference]: Finished difference. Result has 160 places, 211 transitions, 2039 flow [2024-05-12 13:19:40,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1850, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2039, PETRI_PLACES=160, PETRI_TRANSITIONS=211} [2024-05-12 13:19:40,811 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 105 predicate places. [2024-05-12 13:19:40,811 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 211 transitions, 2039 flow [2024-05-12 13:19:40,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:19:40,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:19:40,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:19:40,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-05-12 13:19:40,812 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:19:40,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:19:40,812 INFO L85 PathProgramCache]: Analyzing trace with hash 2066531623, now seen corresponding path program 2 times [2024-05-12 13:19:40,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:19:40,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506543694] [2024-05-12 13:19:40,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:19:40,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:19:40,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:19:41,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:19:41,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:19:41,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506543694] [2024-05-12 13:19:41,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506543694] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:19:41,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:19:41,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:19:41,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532340740] [2024-05-12 13:19:41,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:19:41,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:19:41,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:19:41,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:19:41,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:19:42,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:19:42,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 211 transitions, 2039 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:19:42,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:19:42,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:19:42,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:19:43,170 INFO L124 PetriNetUnfolderBase]: 4869/7670 cut-off events. [2024-05-12 13:19:43,170 INFO L125 PetriNetUnfolderBase]: For 151754/151769 co-relation queries the response was YES. [2024-05-12 13:19:43,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42666 conditions, 7670 events. 4869/7670 cut-off events. For 151754/151769 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 47812 event pairs, 1252 based on Foata normal form. 16/7544 useless extension candidates. Maximal degree in co-relation 42600. Up to 5995 conditions per place. [2024-05-12 13:19:43,235 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 205 selfloop transitions, 77 changer transitions 0/293 dead transitions. [2024-05-12 13:19:43,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 293 transitions, 3312 flow [2024-05-12 13:19:43,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:19:43,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:19:43,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-05-12 13:19:43,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5328798185941043 [2024-05-12 13:19:43,237 INFO L175 Difference]: Start difference. First operand has 160 places, 211 transitions, 2039 flow. Second operand 9 states and 235 transitions. [2024-05-12 13:19:43,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 293 transitions, 3312 flow [2024-05-12 13:19:43,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 293 transitions, 3123 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-05-12 13:19:43,368 INFO L231 Difference]: Finished difference. Result has 166 places, 233 transitions, 2421 flow [2024-05-12 13:19:43,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1904, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2421, PETRI_PLACES=166, PETRI_TRANSITIONS=233} [2024-05-12 13:19:43,369 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 111 predicate places. [2024-05-12 13:19:43,369 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 233 transitions, 2421 flow [2024-05-12 13:19:43,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:19:43,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:19:43,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:19:43,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-05-12 13:19:43,370 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:19:43,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:19:43,370 INFO L85 PathProgramCache]: Analyzing trace with hash 2057008144, now seen corresponding path program 5 times [2024-05-12 13:19:43,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:19:43,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094734999] [2024-05-12 13:19:43,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:19:43,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:19:43,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:19:44,484 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 13:19:44,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:19:44,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094734999] [2024-05-12 13:19:44,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094734999] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:19:44,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:19:44,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:19:44,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989394576] [2024-05-12 13:19:44,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:19:44,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:19:44,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:19:44,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:19:44,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:19:44,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:19:44,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 233 transitions, 2421 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:19:44,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:19:44,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:19:44,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:19:45,959 INFO L124 PetriNetUnfolderBase]: 4874/7432 cut-off events. [2024-05-12 13:19:45,959 INFO L125 PetriNetUnfolderBase]: For 159107/159107 co-relation queries the response was YES. [2024-05-12 13:19:45,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43836 conditions, 7432 events. 4874/7432 cut-off events. For 159107/159107 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 44149 event pairs, 1184 based on Foata normal form. 2/7379 useless extension candidates. Maximal degree in co-relation 43767. Up to 6542 conditions per place. [2024-05-12 13:19:46,015 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 179 selfloop transitions, 108 changer transitions 0/298 dead transitions. [2024-05-12 13:19:46,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 298 transitions, 3537 flow [2024-05-12 13:19:46,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:19:46,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:19:46,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-05-12 13:19:46,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170068027210885 [2024-05-12 13:19:46,017 INFO L175 Difference]: Start difference. First operand has 166 places, 233 transitions, 2421 flow. Second operand 9 states and 228 transitions. [2024-05-12 13:19:46,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 298 transitions, 3537 flow [2024-05-12 13:19:46,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 298 transitions, 3444 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-05-12 13:19:46,194 INFO L231 Difference]: Finished difference. Result has 172 places, 248 transitions, 2987 flow [2024-05-12 13:19:46,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2328, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2987, PETRI_PLACES=172, PETRI_TRANSITIONS=248} [2024-05-12 13:19:46,195 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 117 predicate places. [2024-05-12 13:19:46,195 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 248 transitions, 2987 flow [2024-05-12 13:19:46,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:19:46,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:19:46,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:19:46,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-05-12 13:19:46,195 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:19:46,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:19:46,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1800500194, now seen corresponding path program 6 times [2024-05-12 13:19:46,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:19:46,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766438545] [2024-05-12 13:19:46,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:19:46,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:19:46,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:19:47,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:19:47,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:19:47,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766438545] [2024-05-12 13:19:47,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766438545] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:19:47,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:19:47,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:19:47,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818042439] [2024-05-12 13:19:47,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:19:47,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:19:47,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:19:47,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:19:47,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:19:47,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:19:47,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 248 transitions, 2987 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:19:47,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:19:47,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:19:47,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:19:48,952 INFO L124 PetriNetUnfolderBase]: 4945/7836 cut-off events. [2024-05-12 13:19:48,953 INFO L125 PetriNetUnfolderBase]: For 177120/177135 co-relation queries the response was YES. [2024-05-12 13:19:48,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46630 conditions, 7836 events. 4945/7836 cut-off events. For 177120/177135 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 49501 event pairs, 1368 based on Foata normal form. 14/7694 useless extension candidates. Maximal degree in co-relation 46558. Up to 6787 conditions per place. [2024-05-12 13:19:49,033 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 245 selfloop transitions, 47 changer transitions 0/303 dead transitions. [2024-05-12 13:19:49,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 303 transitions, 3832 flow [2024-05-12 13:19:49,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:19:49,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:19:49,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-05-12 13:19:49,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5124716553287982 [2024-05-12 13:19:49,034 INFO L175 Difference]: Start difference. First operand has 172 places, 248 transitions, 2987 flow. Second operand 9 states and 226 transitions. [2024-05-12 13:19:49,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 303 transitions, 3832 flow [2024-05-12 13:19:49,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 303 transitions, 3487 flow, removed 147 selfloop flow, removed 4 redundant places. [2024-05-12 13:19:49,371 INFO L231 Difference]: Finished difference. Result has 177 places, 254 transitions, 2859 flow [2024-05-12 13:19:49,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2642, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2859, PETRI_PLACES=177, PETRI_TRANSITIONS=254} [2024-05-12 13:19:49,372 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 122 predicate places. [2024-05-12 13:19:49,372 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 254 transitions, 2859 flow [2024-05-12 13:19:49,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:19:49,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:19:49,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:19:49,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-05-12 13:19:49,373 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:19:49,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:19:49,373 INFO L85 PathProgramCache]: Analyzing trace with hash 2066204914, now seen corresponding path program 7 times [2024-05-12 13:19:49,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:19:49,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469061041] [2024-05-12 13:19:49,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:19:49,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:19:49,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:19:50,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:19:50,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:19:50,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469061041] [2024-05-12 13:19:50,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469061041] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:19:50,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:19:50,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:19:50,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416938260] [2024-05-12 13:19:50,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:19:50,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:19:50,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:19:50,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:19:50,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:19:50,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:19:50,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 254 transitions, 2859 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:19:50,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:19:50,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:19:50,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:19:51,849 INFO L124 PetriNetUnfolderBase]: 4943/7539 cut-off events. [2024-05-12 13:19:51,849 INFO L125 PetriNetUnfolderBase]: For 175657/175657 co-relation queries the response was YES. [2024-05-12 13:19:51,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45188 conditions, 7539 events. 4943/7539 cut-off events. For 175657/175657 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 44982 event pairs, 1184 based on Foata normal form. 2/7486 useless extension candidates. Maximal degree in co-relation 45116. Up to 6397 conditions per place. [2024-05-12 13:19:51,922 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 147 selfloop transitions, 154 changer transitions 0/312 dead transitions. [2024-05-12 13:19:51,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 312 transitions, 3893 flow [2024-05-12 13:19:51,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:19:51,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:19:51,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-05-12 13:19:51,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5215419501133787 [2024-05-12 13:19:51,931 INFO L175 Difference]: Start difference. First operand has 177 places, 254 transitions, 2859 flow. Second operand 9 states and 230 transitions. [2024-05-12 13:19:51,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 312 transitions, 3893 flow [2024-05-12 13:19:52,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 312 transitions, 3729 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-05-12 13:19:52,180 INFO L231 Difference]: Finished difference. Result has 180 places, 260 transitions, 3186 flow [2024-05-12 13:19:52,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2695, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3186, PETRI_PLACES=180, PETRI_TRANSITIONS=260} [2024-05-12 13:19:52,185 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 125 predicate places. [2024-05-12 13:19:52,185 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 260 transitions, 3186 flow [2024-05-12 13:19:52,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:19:52,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:19:52,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:19:52,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-05-12 13:19:52,186 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:19:52,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:19:52,186 INFO L85 PathProgramCache]: Analyzing trace with hash 2057008423, now seen corresponding path program 3 times [2024-05-12 13:19:52,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:19:52,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619861456] [2024-05-12 13:19:52,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:19:52,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:19:52,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:19:53,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:19:53,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:19:53,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619861456] [2024-05-12 13:19:53,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619861456] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:19:53,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:19:53,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:19:53,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850817835] [2024-05-12 13:19:53,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:19:53,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:19:53,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:19:53,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:19:53,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:19:53,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:19:53,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 260 transitions, 3186 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:19:53,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:19:53,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:19:53,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:19:54,585 INFO L124 PetriNetUnfolderBase]: 4998/7678 cut-off events. [2024-05-12 13:19:54,585 INFO L125 PetriNetUnfolderBase]: For 191449/191464 co-relation queries the response was YES. [2024-05-12 13:19:54,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47022 conditions, 7678 events. 4998/7678 cut-off events. For 191449/191464 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 46399 event pairs, 1243 based on Foata normal form. 16/7627 useless extension candidates. Maximal degree in co-relation 46950. Up to 6912 conditions per place. [2024-05-12 13:19:54,651 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 242 selfloop transitions, 62 changer transitions 0/315 dead transitions. [2024-05-12 13:19:54,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 315 transitions, 4056 flow [2024-05-12 13:19:54,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:19:54,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:19:54,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-05-12 13:19:54,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5056689342403629 [2024-05-12 13:19:54,653 INFO L175 Difference]: Start difference. First operand has 180 places, 260 transitions, 3186 flow. Second operand 9 states and 223 transitions. [2024-05-12 13:19:54,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 315 transitions, 4056 flow [2024-05-12 13:19:54,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 315 transitions, 3851 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-05-12 13:19:54,881 INFO L231 Difference]: Finished difference. Result has 184 places, 264 transitions, 3229 flow [2024-05-12 13:19:54,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2981, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3229, PETRI_PLACES=184, PETRI_TRANSITIONS=264} [2024-05-12 13:19:54,882 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 129 predicate places. [2024-05-12 13:19:54,882 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 264 transitions, 3229 flow [2024-05-12 13:19:54,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:19:54,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:19:54,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:19:54,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-05-12 13:19:54,883 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:19:54,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:19:54,883 INFO L85 PathProgramCache]: Analyzing trace with hash 2066205193, now seen corresponding path program 4 times [2024-05-12 13:19:54,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:19:54,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446529392] [2024-05-12 13:19:54,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:19:54,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:19:54,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:19:55,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:19:55,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:19:55,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446529392] [2024-05-12 13:19:55,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446529392] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:19:55,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:19:55,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:19:55,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590056232] [2024-05-12 13:19:55,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:19:55,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:19:55,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:19:55,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:19:55,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:19:56,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:19:56,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 264 transitions, 3229 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:19:56,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:19:56,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:19:56,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:19:57,653 INFO L124 PetriNetUnfolderBase]: 5217/8221 cut-off events. [2024-05-12 13:19:57,654 INFO L125 PetriNetUnfolderBase]: For 214472/214487 co-relation queries the response was YES. [2024-05-12 13:19:57,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49874 conditions, 8221 events. 5217/8221 cut-off events. For 214472/214487 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 51938 event pairs, 1374 based on Foata normal form. 32/8107 useless extension candidates. Maximal degree in co-relation 49800. Up to 6751 conditions per place. [2024-05-12 13:19:57,739 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 240 selfloop transitions, 80 changer transitions 0/331 dead transitions. [2024-05-12 13:19:57,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 331 transitions, 4278 flow [2024-05-12 13:19:57,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:19:57,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:19:57,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 258 transitions. [2024-05-12 13:19:57,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5265306122448979 [2024-05-12 13:19:57,741 INFO L175 Difference]: Start difference. First operand has 184 places, 264 transitions, 3229 flow. Second operand 10 states and 258 transitions. [2024-05-12 13:19:57,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 331 transitions, 4278 flow [2024-05-12 13:19:57,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 331 transitions, 4028 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-05-12 13:19:57,948 INFO L231 Difference]: Finished difference. Result has 187 places, 267 transitions, 3222 flow [2024-05-12 13:19:57,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2979, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3222, PETRI_PLACES=187, PETRI_TRANSITIONS=267} [2024-05-12 13:19:57,949 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 132 predicate places. [2024-05-12 13:19:57,949 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 267 transitions, 3222 flow [2024-05-12 13:19:57,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:19:57,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:19:57,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:19:57,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-05-12 13:19:57,949 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:19:57,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:19:57,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1800507913, now seen corresponding path program 5 times [2024-05-12 13:19:57,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:19:57,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416783871] [2024-05-12 13:19:57,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:19:57,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:19:57,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:19:59,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:19:59,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:19:59,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416783871] [2024-05-12 13:19:59,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416783871] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:19:59,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:19:59,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:19:59,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257149152] [2024-05-12 13:19:59,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:19:59,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:19:59,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:19:59,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:19:59,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:19:59,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:19:59,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 267 transitions, 3222 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:19:59,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:19:59,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:19:59,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:20:00,501 INFO L124 PetriNetUnfolderBase]: 5202/7994 cut-off events. [2024-05-12 13:20:00,501 INFO L125 PetriNetUnfolderBase]: For 214905/214920 co-relation queries the response was YES. [2024-05-12 13:20:00,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49906 conditions, 7994 events. 5202/7994 cut-off events. For 214905/214920 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 48745 event pairs, 1259 based on Foata normal form. 16/7941 useless extension candidates. Maximal degree in co-relation 49831. Up to 7224 conditions per place. [2024-05-12 13:20:00,592 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 250 selfloop transitions, 60 changer transitions 0/321 dead transitions. [2024-05-12 13:20:00,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 321 transitions, 4101 flow [2024-05-12 13:20:00,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:20:00,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:20:00,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-05-12 13:20:00,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-05-12 13:20:00,594 INFO L175 Difference]: Start difference. First operand has 187 places, 267 transitions, 3222 flow. Second operand 9 states and 224 transitions. [2024-05-12 13:20:00,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 321 transitions, 4101 flow [2024-05-12 13:20:00,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 321 transitions, 3935 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-05-12 13:20:00,908 INFO L231 Difference]: Finished difference. Result has 189 places, 270 transitions, 3295 flow [2024-05-12 13:20:00,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3056, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3295, PETRI_PLACES=189, PETRI_TRANSITIONS=270} [2024-05-12 13:20:00,909 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 134 predicate places. [2024-05-12 13:20:00,909 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 270 transitions, 3295 flow [2024-05-12 13:20:00,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:20:00,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:20:00,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:20:00,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-05-12 13:20:00,910 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:20:00,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:20:00,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1800507634, now seen corresponding path program 8 times [2024-05-12 13:20:00,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:20:00,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394387180] [2024-05-12 13:20:00,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:20:00,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:20:00,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:20:02,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:20:02,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:20:02,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394387180] [2024-05-12 13:20:02,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394387180] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:20:02,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:20:02,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:20:02,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570818301] [2024-05-12 13:20:02,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:20:02,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:20:02,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:20:02,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:20:02,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:20:02,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:20:02,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 270 transitions, 3295 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:20:02,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:20:02,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:20:02,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:20:04,019 INFO L124 PetriNetUnfolderBase]: 5217/8296 cut-off events. [2024-05-12 13:20:04,019 INFO L125 PetriNetUnfolderBase]: For 217276/217291 co-relation queries the response was YES. [2024-05-12 13:20:04,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50119 conditions, 8296 events. 5217/8296 cut-off events. For 217276/217291 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 53190 event pairs, 1392 based on Foata normal form. 14/8142 useless extension candidates. Maximal degree in co-relation 50043. Up to 7145 conditions per place. [2024-05-12 13:20:04,098 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 265 selfloop transitions, 56 changer transitions 0/332 dead transitions. [2024-05-12 13:20:04,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 332 transitions, 4329 flow [2024-05-12 13:20:04,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:20:04,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:20:04,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 253 transitions. [2024-05-12 13:20:04,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5163265306122449 [2024-05-12 13:20:04,104 INFO L175 Difference]: Start difference. First operand has 189 places, 270 transitions, 3295 flow. Second operand 10 states and 253 transitions. [2024-05-12 13:20:04,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 332 transitions, 4329 flow [2024-05-12 13:20:04,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 332 transitions, 4115 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-05-12 13:20:04,501 INFO L231 Difference]: Finished difference. Result has 192 places, 273 transitions, 3295 flow [2024-05-12 13:20:04,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3081, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3295, PETRI_PLACES=192, PETRI_TRANSITIONS=273} [2024-05-12 13:20:04,502 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 137 predicate places. [2024-05-12 13:20:04,502 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 273 transitions, 3295 flow [2024-05-12 13:20:04,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:20:04,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:20:04,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:20:04,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-05-12 13:20:04,503 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:20:04,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:20:04,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1800298384, now seen corresponding path program 9 times [2024-05-12 13:20:04,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:20:04,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561187846] [2024-05-12 13:20:04,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:20:04,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:20:04,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:20:05,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:20:05,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:20:05,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561187846] [2024-05-12 13:20:05,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561187846] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:20:05,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:20:05,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:20:05,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984918386] [2024-05-12 13:20:05,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:20:05,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:20:05,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:20:05,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:20:05,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:20:05,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:20:05,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 273 transitions, 3295 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:20:05,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:20:05,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:20:05,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:20:07,524 INFO L124 PetriNetUnfolderBase]: 5212/8291 cut-off events. [2024-05-12 13:20:07,524 INFO L125 PetriNetUnfolderBase]: For 220701/220716 co-relation queries the response was YES. [2024-05-12 13:20:07,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49937 conditions, 8291 events. 5212/8291 cut-off events. For 220701/220716 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 53185 event pairs, 1394 based on Foata normal form. 14/8134 useless extension candidates. Maximal degree in co-relation 49860. Up to 7191 conditions per place. [2024-05-12 13:20:07,608 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 263 selfloop transitions, 48 changer transitions 0/322 dead transitions. [2024-05-12 13:20:07,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 322 transitions, 4069 flow [2024-05-12 13:20:07,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:20:07,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:20:07,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-05-12 13:20:07,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2024-05-12 13:20:07,611 INFO L175 Difference]: Start difference. First operand has 192 places, 273 transitions, 3295 flow. Second operand 9 states and 225 transitions. [2024-05-12 13:20:07,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 322 transitions, 4069 flow [2024-05-12 13:20:07,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 322 transitions, 3805 flow, removed 84 selfloop flow, removed 7 redundant places. [2024-05-12 13:20:07,995 INFO L231 Difference]: Finished difference. Result has 194 places, 273 transitions, 3135 flow [2024-05-12 13:20:07,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3031, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3135, PETRI_PLACES=194, PETRI_TRANSITIONS=273} [2024-05-12 13:20:07,995 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 139 predicate places. [2024-05-12 13:20:07,995 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 273 transitions, 3135 flow [2024-05-12 13:20:07,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:20:07,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:20:07,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:20:07,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-05-12 13:20:07,996 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:20:07,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:20:07,997 INFO L85 PathProgramCache]: Analyzing trace with hash -98669131, now seen corresponding path program 2 times [2024-05-12 13:20:07,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:20:07,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782981942] [2024-05-12 13:20:07,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:20:07,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:20:08,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:20:08,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:20:08,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:20:08,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782981942] [2024-05-12 13:20:08,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782981942] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:20:08,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:20:08,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:20:08,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219636652] [2024-05-12 13:20:08,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:20:08,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:20:08,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:20:08,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:20:08,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:20:08,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:20:08,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 273 transitions, 3135 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:20:08,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:20:08,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:20:08,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:20:10,146 INFO L124 PetriNetUnfolderBase]: 5229/8381 cut-off events. [2024-05-12 13:20:10,146 INFO L125 PetriNetUnfolderBase]: For 225962/225962 co-relation queries the response was YES. [2024-05-12 13:20:10,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49735 conditions, 8381 events. 5229/8381 cut-off events. For 225962/225962 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 54508 event pairs, 1516 based on Foata normal form. 2/8207 useless extension candidates. Maximal degree in co-relation 49657. Up to 7372 conditions per place. [2024-05-12 13:20:10,237 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 256 selfloop transitions, 28 changer transitions 0/295 dead transitions. [2024-05-12 13:20:10,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 295 transitions, 3791 flow [2024-05-12 13:20:10,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:20:10,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:20:10,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-05-12 13:20:10,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965986394557823 [2024-05-12 13:20:10,238 INFO L175 Difference]: Start difference. First operand has 194 places, 273 transitions, 3135 flow. Second operand 6 states and 146 transitions. [2024-05-12 13:20:10,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 295 transitions, 3791 flow [2024-05-12 13:20:10,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 295 transitions, 3669 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-05-12 13:20:10,487 INFO L231 Difference]: Finished difference. Result has 194 places, 273 transitions, 3075 flow [2024-05-12 13:20:10,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3013, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3075, PETRI_PLACES=194, PETRI_TRANSITIONS=273} [2024-05-12 13:20:10,487 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 139 predicate places. [2024-05-12 13:20:10,487 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 273 transitions, 3075 flow [2024-05-12 13:20:10,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:20:10,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:20:10,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:20:10,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-05-12 13:20:10,488 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:20:10,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:20:10,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1684520538, now seen corresponding path program 1 times [2024-05-12 13:20:10,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:20:10,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393301532] [2024-05-12 13:20:10,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:20:10,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:20:10,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:20:11,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:20:11,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:20:11,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393301532] [2024-05-12 13:20:11,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393301532] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:20:11,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:20:11,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:20:11,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060913076] [2024-05-12 13:20:11,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:20:11,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:20:11,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:20:11,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:20:11,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:20:11,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:20:11,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 273 transitions, 3075 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 13:20:11,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:20:11,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:20:11,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:20:12,385 INFO L124 PetriNetUnfolderBase]: 4743/7905 cut-off events. [2024-05-12 13:20:12,386 INFO L125 PetriNetUnfolderBase]: For 203954/203954 co-relation queries the response was YES. [2024-05-12 13:20:12,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45665 conditions, 7905 events. 4743/7905 cut-off events. For 203954/203954 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 53210 event pairs, 1277 based on Foata normal form. 1/7691 useless extension candidates. Maximal degree in co-relation 45586. Up to 6762 conditions per place. [2024-05-12 13:20:12,463 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 276 selfloop transitions, 18 changer transitions 0/306 dead transitions. [2024-05-12 13:20:12,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 306 transitions, 3883 flow [2024-05-12 13:20:12,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:20:12,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:20:12,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-05-12 13:20:12,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5136054421768708 [2024-05-12 13:20:12,470 INFO L175 Difference]: Start difference. First operand has 194 places, 273 transitions, 3075 flow. Second operand 6 states and 151 transitions. [2024-05-12 13:20:12,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 306 transitions, 3883 flow [2024-05-12 13:20:12,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 306 transitions, 3800 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-05-12 13:20:12,696 INFO L231 Difference]: Finished difference. Result has 196 places, 283 transitions, 3138 flow [2024-05-12 13:20:12,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2998, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3138, PETRI_PLACES=196, PETRI_TRANSITIONS=283} [2024-05-12 13:20:12,697 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 141 predicate places. [2024-05-12 13:20:12,698 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 283 transitions, 3138 flow [2024-05-12 13:20:12,698 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 13:20:12,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:20:12,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:20:12,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-05-12 13:20:12,698 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:20:12,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:20:12,699 INFO L85 PathProgramCache]: Analyzing trace with hash -46826808, now seen corresponding path program 2 times [2024-05-12 13:20:12,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:20:12,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677143780] [2024-05-12 13:20:12,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:20:12,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:20:12,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:20:13,450 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 13:20:13,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:20:13,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677143780] [2024-05-12 13:20:13,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677143780] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:20:13,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:20:13,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:20:13,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087040885] [2024-05-12 13:20:13,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:20:13,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:20:13,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:20:13,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:20:13,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:20:13,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:20:13,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 283 transitions, 3138 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 13:20:13,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:20:13,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:20:13,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:20:14,772 INFO L124 PetriNetUnfolderBase]: 4725/7783 cut-off events. [2024-05-12 13:20:14,773 INFO L125 PetriNetUnfolderBase]: For 213554/213554 co-relation queries the response was YES. [2024-05-12 13:20:14,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46514 conditions, 7783 events. 4725/7783 cut-off events. For 213554/213554 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 51743 event pairs, 1341 based on Foata normal form. 1/7608 useless extension candidates. Maximal degree in co-relation 46433. Up to 6761 conditions per place. [2024-05-12 13:20:14,844 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 275 selfloop transitions, 13 changer transitions 0/300 dead transitions. [2024-05-12 13:20:14,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 300 transitions, 3762 flow [2024-05-12 13:20:14,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:20:14,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:20:14,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-05-12 13:20:14,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2024-05-12 13:20:14,846 INFO L175 Difference]: Start difference. First operand has 196 places, 283 transitions, 3138 flow. Second operand 6 states and 144 transitions. [2024-05-12 13:20:14,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 300 transitions, 3762 flow [2024-05-12 13:20:15,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 300 transitions, 3724 flow, removed 18 selfloop flow, removed 1 redundant places. [2024-05-12 13:20:15,069 INFO L231 Difference]: Finished difference. Result has 201 places, 283 transitions, 3132 flow [2024-05-12 13:20:15,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3100, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3132, PETRI_PLACES=201, PETRI_TRANSITIONS=283} [2024-05-12 13:20:15,070 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 146 predicate places. [2024-05-12 13:20:15,070 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 283 transitions, 3132 flow [2024-05-12 13:20:15,070 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 13:20:15,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:20:15,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:20:15,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-05-12 13:20:15,071 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:20:15,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:20:15,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1677875161, now seen corresponding path program 1 times [2024-05-12 13:20:15,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:20:15,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712594148] [2024-05-12 13:20:15,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:20:15,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:20:15,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:20:15,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:20:15,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:20:15,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712594148] [2024-05-12 13:20:15,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712594148] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:20:15,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:20:15,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:20:15,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228960101] [2024-05-12 13:20:15,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:20:15,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:20:15,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:20:15,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:20:15,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:20:15,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:20:15,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 283 transitions, 3132 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 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 13:20:15,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:20:15,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:20:15,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:20:17,386 INFO L124 PetriNetUnfolderBase]: 5041/8163 cut-off events. [2024-05-12 13:20:17,387 INFO L125 PetriNetUnfolderBase]: For 222700/222700 co-relation queries the response was YES. [2024-05-12 13:20:17,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48527 conditions, 8163 events. 5041/8163 cut-off events. For 222700/222700 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 53314 event pairs, 1455 based on Foata normal form. 2/8005 useless extension candidates. Maximal degree in co-relation 48443. Up to 7226 conditions per place. [2024-05-12 13:20:17,457 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 281 selfloop transitions, 20 changer transitions 0/311 dead transitions. [2024-05-12 13:20:17,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 311 transitions, 3840 flow [2024-05-12 13:20:17,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:20:17,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:20:17,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-05-12 13:20:17,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4752186588921283 [2024-05-12 13:20:17,458 INFO L175 Difference]: Start difference. First operand has 201 places, 283 transitions, 3132 flow. Second operand 7 states and 163 transitions. [2024-05-12 13:20:17,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 311 transitions, 3840 flow [2024-05-12 13:20:17,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 311 transitions, 3799 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-05-12 13:20:17,701 INFO L231 Difference]: Finished difference. Result has 203 places, 286 transitions, 3175 flow [2024-05-12 13:20:17,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3091, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3175, PETRI_PLACES=203, PETRI_TRANSITIONS=286} [2024-05-12 13:20:17,702 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 148 predicate places. [2024-05-12 13:20:17,702 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 286 transitions, 3175 flow [2024-05-12 13:20:17,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 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 13:20:17,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:20:17,702 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 13:20:17,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-05-12 13:20:17,703 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:20:17,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:20:17,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1691438513, now seen corresponding path program 1 times [2024-05-12 13:20:17,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:20:17,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842421567] [2024-05-12 13:20:17,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:20:17,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:20:17,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:20:19,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:20:19,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:20:19,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842421567] [2024-05-12 13:20:19,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842421567] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:20:19,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:20:19,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:20:19,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281713640] [2024-05-12 13:20:19,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:20:19,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:20:19,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:20:19,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:20:19,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:20:19,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:20:19,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 286 transitions, 3175 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 13:20:19,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:20:19,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:20:19,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:20:20,909 INFO L124 PetriNetUnfolderBase]: 5385/8678 cut-off events. [2024-05-12 13:20:20,909 INFO L125 PetriNetUnfolderBase]: For 278964/278968 co-relation queries the response was YES. [2024-05-12 13:20:20,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54065 conditions, 8678 events. 5385/8678 cut-off events. For 278964/278968 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 56960 event pairs, 1538 based on Foata normal form. 20/8512 useless extension candidates. Maximal degree in co-relation 53981. Up to 7453 conditions per place. [2024-05-12 13:20:20,995 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 308 selfloop transitions, 32 changer transitions 0/351 dead transitions. [2024-05-12 13:20:20,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 351 transitions, 4129 flow [2024-05-12 13:20:20,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 13:20:20,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 13:20:20,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 266 transitions. [2024-05-12 13:20:20,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935064935064935 [2024-05-12 13:20:20,996 INFO L175 Difference]: Start difference. First operand has 203 places, 286 transitions, 3175 flow. Second operand 11 states and 266 transitions. [2024-05-12 13:20:20,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 351 transitions, 4129 flow [2024-05-12 13:20:21,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 351 transitions, 4067 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-05-12 13:20:21,254 INFO L231 Difference]: Finished difference. Result has 209 places, 287 transitions, 3234 flow [2024-05-12 13:20:21,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3113, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3234, PETRI_PLACES=209, PETRI_TRANSITIONS=287} [2024-05-12 13:20:21,255 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 154 predicate places. [2024-05-12 13:20:21,255 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 287 transitions, 3234 flow [2024-05-12 13:20:21,255 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 13:20:21,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:20:21,256 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 13:20:21,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-05-12 13:20:21,256 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:20:21,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:20:21,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1916549497, now seen corresponding path program 2 times [2024-05-12 13:20:21,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:20:21,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050968320] [2024-05-12 13:20:21,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:20:21,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:20:21,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:20:22,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:20:22,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:20:22,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050968320] [2024-05-12 13:20:22,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050968320] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:20:22,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:20:22,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:20:22,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618547768] [2024-05-12 13:20:22,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:20:22,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:20:22,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:20:22,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:20:22,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:20:22,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:20:22,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 287 transitions, 3234 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 13:20:22,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:20:22,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:20:22,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:20:24,452 INFO L124 PetriNetUnfolderBase]: 5502/8851 cut-off events. [2024-05-12 13:20:24,452 INFO L125 PetriNetUnfolderBase]: For 300784/300788 co-relation queries the response was YES. [2024-05-12 13:20:24,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56073 conditions, 8851 events. 5502/8851 cut-off events. For 300784/300788 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 58291 event pairs, 1582 based on Foata normal form. 20/8689 useless extension candidates. Maximal degree in co-relation 55988. Up to 7614 conditions per place. [2024-05-12 13:20:24,545 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 311 selfloop transitions, 28 changer transitions 0/350 dead transitions. [2024-05-12 13:20:24,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 350 transitions, 4189 flow [2024-05-12 13:20:24,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:20:24,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:20:24,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 249 transitions. [2024-05-12 13:20:24,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5081632653061224 [2024-05-12 13:20:24,547 INFO L175 Difference]: Start difference. First operand has 209 places, 287 transitions, 3234 flow. Second operand 10 states and 249 transitions. [2024-05-12 13:20:24,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 350 transitions, 4189 flow [2024-05-12 13:20:24,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 350 transitions, 4104 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-05-12 13:20:24,902 INFO L231 Difference]: Finished difference. Result has 210 places, 288 transitions, 3261 flow [2024-05-12 13:20:24,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3149, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3261, PETRI_PLACES=210, PETRI_TRANSITIONS=288} [2024-05-12 13:20:24,903 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 155 predicate places. [2024-05-12 13:20:24,903 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 288 transitions, 3261 flow [2024-05-12 13:20:24,903 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 13:20:24,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:20:24,903 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 13:20:24,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-05-12 13:20:24,903 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:20:24,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:20:24,904 INFO L85 PathProgramCache]: Analyzing trace with hash -143314829, now seen corresponding path program 3 times [2024-05-12 13:20:24,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:20:24,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077756405] [2024-05-12 13:20:24,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:20:24,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:20:24,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:20:26,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:20:26,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:20:26,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077756405] [2024-05-12 13:20:26,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077756405] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:20:26,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:20:26,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:20:26,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488324623] [2024-05-12 13:20:26,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:20:26,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:20:26,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:20:26,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:20:26,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:20:26,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:20:26,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 288 transitions, 3261 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 13:20:26,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:20:26,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:20:26,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:20:28,092 INFO L124 PetriNetUnfolderBase]: 5924/9519 cut-off events. [2024-05-12 13:20:28,094 INFO L125 PetriNetUnfolderBase]: For 355239/355243 co-relation queries the response was YES. [2024-05-12 13:20:28,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63131 conditions, 9519 events. 5924/9519 cut-off events. For 355239/355243 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 63447 event pairs, 1627 based on Foata normal form. 16/9351 useless extension candidates. Maximal degree in co-relation 63045. Up to 7642 conditions per place. [2024-05-12 13:20:28,200 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 310 selfloop transitions, 40 changer transitions 0/361 dead transitions. [2024-05-12 13:20:28,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 361 transitions, 4537 flow [2024-05-12 13:20:28,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:20:28,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:20:28,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 254 transitions. [2024-05-12 13:20:28,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5183673469387755 [2024-05-12 13:20:28,206 INFO L175 Difference]: Start difference. First operand has 210 places, 288 transitions, 3261 flow. Second operand 10 states and 254 transitions. [2024-05-12 13:20:28,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 361 transitions, 4537 flow [2024-05-12 13:20:28,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 361 transitions, 4460 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-05-12 13:20:28,748 INFO L231 Difference]: Finished difference. Result has 214 places, 294 transitions, 3476 flow [2024-05-12 13:20:28,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3184, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3476, PETRI_PLACES=214, PETRI_TRANSITIONS=294} [2024-05-12 13:20:28,749 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 159 predicate places. [2024-05-12 13:20:28,749 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 294 transitions, 3476 flow [2024-05-12 13:20:28,750 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 13:20:28,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:20:28,750 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 13:20:28,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-05-12 13:20:28,750 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:20:28,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:20:28,751 INFO L85 PathProgramCache]: Analyzing trace with hash -143323199, now seen corresponding path program 4 times [2024-05-12 13:20:28,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:20:28,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731840366] [2024-05-12 13:20:28,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:20:28,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:20:28,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:20:29,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:20:29,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:20:29,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731840366] [2024-05-12 13:20:29,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731840366] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:20:29,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:20:29,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:20:29,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489260764] [2024-05-12 13:20:29,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:20:29,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:20:29,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:20:29,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:20:29,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:20:30,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:20:30,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 294 transitions, 3476 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 13:20:30,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:20:30,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:20:30,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:20:31,859 INFO L124 PetriNetUnfolderBase]: 5921/9588 cut-off events. [2024-05-12 13:20:31,860 INFO L125 PetriNetUnfolderBase]: For 364017/364021 co-relation queries the response was YES. [2024-05-12 13:20:31,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63189 conditions, 9588 events. 5921/9588 cut-off events. For 364017/364021 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 64715 event pairs, 1635 based on Foata normal form. 20/9405 useless extension candidates. Maximal degree in co-relation 63100. Up to 8072 conditions per place. [2024-05-12 13:20:31,948 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 267 selfloop transitions, 81 changer transitions 0/359 dead transitions. [2024-05-12 13:20:31,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 359 transitions, 4458 flow [2024-05-12 13:20:31,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:20:31,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:20:31,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 253 transitions. [2024-05-12 13:20:31,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5163265306122449 [2024-05-12 13:20:31,949 INFO L175 Difference]: Start difference. First operand has 214 places, 294 transitions, 3476 flow. Second operand 10 states and 253 transitions. [2024-05-12 13:20:31,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 359 transitions, 4458 flow [2024-05-12 13:20:32,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 359 transitions, 4396 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-05-12 13:20:32,299 INFO L231 Difference]: Finished difference. Result has 219 places, 295 transitions, 3640 flow [2024-05-12 13:20:32,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3414, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3640, PETRI_PLACES=219, PETRI_TRANSITIONS=295} [2024-05-12 13:20:32,299 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 164 predicate places. [2024-05-12 13:20:32,299 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 295 transitions, 3640 flow [2024-05-12 13:20:32,300 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 13:20:32,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:20:32,300 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 13:20:32,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-05-12 13:20:32,300 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:20:32,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:20:32,300 INFO L85 PathProgramCache]: Analyzing trace with hash -149809949, now seen corresponding path program 5 times [2024-05-12 13:20:32,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:20:32,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631991110] [2024-05-12 13:20:32,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:20:32,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:20:32,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:20:33,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:20:33,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:20:33,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631991110] [2024-05-12 13:20:33,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631991110] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:20:33,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:20:33,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:20:33,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730696032] [2024-05-12 13:20:33,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:20:33,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:20:33,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:20:33,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:20:33,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:20:33,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:20:33,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 295 transitions, 3640 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 13:20:33,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:20:33,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:20:33,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:20:35,552 INFO L124 PetriNetUnfolderBase]: 5888/9531 cut-off events. [2024-05-12 13:20:35,552 INFO L125 PetriNetUnfolderBase]: For 355187/355191 co-relation queries the response was YES. [2024-05-12 13:20:35,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62317 conditions, 9531 events. 5888/9531 cut-off events. For 355187/355191 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 64276 event pairs, 1700 based on Foata normal form. 20/9351 useless extension candidates. Maximal degree in co-relation 62226. Up to 8216 conditions per place. [2024-05-12 13:20:35,654 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 318 selfloop transitions, 28 changer transitions 0/357 dead transitions. [2024-05-12 13:20:35,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 357 transitions, 4562 flow [2024-05-12 13:20:35,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:20:35,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:20:35,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 249 transitions. [2024-05-12 13:20:35,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5081632653061224 [2024-05-12 13:20:35,656 INFO L175 Difference]: Start difference. First operand has 219 places, 295 transitions, 3640 flow. Second operand 10 states and 249 transitions. [2024-05-12 13:20:35,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 357 transitions, 4562 flow [2024-05-12 13:20:36,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 357 transitions, 4336 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-05-12 13:20:36,186 INFO L231 Difference]: Finished difference. Result has 221 places, 295 transitions, 3477 flow [2024-05-12 13:20:36,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3414, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3477, PETRI_PLACES=221, PETRI_TRANSITIONS=295} [2024-05-12 13:20:36,187 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 166 predicate places. [2024-05-12 13:20:36,187 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 295 transitions, 3477 flow [2024-05-12 13:20:36,190 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 13:20:36,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:20:36,191 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 13:20:36,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-05-12 13:20:36,191 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:20:36,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:20:36,191 INFO L85 PathProgramCache]: Analyzing trace with hash -858767440, now seen corresponding path program 1 times [2024-05-12 13:20:36,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:20:36,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640887406] [2024-05-12 13:20:36,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:20:36,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:20:36,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:20:36,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:20:36,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:20:36,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640887406] [2024-05-12 13:20:36,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640887406] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:20:36,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:20:36,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:20:36,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979942530] [2024-05-12 13:20:36,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:20:36,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:20:36,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:20:36,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:20:36,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:20:36,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:20:36,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 295 transitions, 3477 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:20:36,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:20:36,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:20:36,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:20:38,613 INFO L124 PetriNetUnfolderBase]: 6241/10013 cut-off events. [2024-05-12 13:20:38,614 INFO L125 PetriNetUnfolderBase]: For 338397/338397 co-relation queries the response was YES. [2024-05-12 13:20:38,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63386 conditions, 10013 events. 6241/10013 cut-off events. For 338397/338397 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 67022 event pairs, 1849 based on Foata normal form. 2/9801 useless extension candidates. Maximal degree in co-relation 63294. Up to 8865 conditions per place. [2024-05-12 13:20:38,730 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 291 selfloop transitions, 37 changer transitions 0/337 dead transitions. [2024-05-12 13:20:38,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 337 transitions, 4459 flow [2024-05-12 13:20:38,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:20:38,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:20:38,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-05-12 13:20:38,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4956268221574344 [2024-05-12 13:20:38,731 INFO L175 Difference]: Start difference. First operand has 221 places, 295 transitions, 3477 flow. Second operand 7 states and 170 transitions. [2024-05-12 13:20:38,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 337 transitions, 4459 flow [2024-05-12 13:20:39,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 337 transitions, 4402 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-05-12 13:20:39,140 INFO L231 Difference]: Finished difference. Result has 220 places, 301 transitions, 3590 flow [2024-05-12 13:20:39,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3420, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3590, PETRI_PLACES=220, PETRI_TRANSITIONS=301} [2024-05-12 13:20:39,141 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 165 predicate places. [2024-05-12 13:20:39,142 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 301 transitions, 3590 flow [2024-05-12 13:20:39,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:20:39,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:20:39,142 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 13:20:39,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-05-12 13:20:39,142 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:20:39,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:20:39,143 INFO L85 PathProgramCache]: Analyzing trace with hash -25323229, now seen corresponding path program 6 times [2024-05-12 13:20:39,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:20:39,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184528080] [2024-05-12 13:20:39,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:20:39,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:20:39,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:20:40,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:20:40,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:20:40,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184528080] [2024-05-12 13:20:40,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184528080] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:20:40,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:20:40,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:20:40,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536794294] [2024-05-12 13:20:40,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:20:40,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:20:40,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:20:40,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:20:40,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:20:40,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:20:40,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 301 transitions, 3590 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 13:20:40,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:20:40,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:20:40,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:20:42,396 INFO L124 PetriNetUnfolderBase]: 6078/9811 cut-off events. [2024-05-12 13:20:42,397 INFO L125 PetriNetUnfolderBase]: For 373557/373592 co-relation queries the response was YES. [2024-05-12 13:20:42,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64765 conditions, 9811 events. 6078/9811 cut-off events. For 373557/373592 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 66299 event pairs, 1580 based on Foata normal form. 32/9618 useless extension candidates. Maximal degree in co-relation 64672. Up to 8337 conditions per place. [2024-05-12 13:20:42,507 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 301 selfloop transitions, 49 changer transitions 0/363 dead transitions. [2024-05-12 13:20:42,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 363 transitions, 4579 flow [2024-05-12 13:20:42,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:20:42,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:20:42,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 251 transitions. [2024-05-12 13:20:42,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5122448979591837 [2024-05-12 13:20:42,508 INFO L175 Difference]: Start difference. First operand has 220 places, 301 transitions, 3590 flow. Second operand 10 states and 251 transitions. [2024-05-12 13:20:42,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 363 transitions, 4579 flow [2024-05-12 13:20:43,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 363 transitions, 4523 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-05-12 13:20:43,066 INFO L231 Difference]: Finished difference. Result has 227 places, 302 transitions, 3692 flow [2024-05-12 13:20:43,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3534, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3692, PETRI_PLACES=227, PETRI_TRANSITIONS=302} [2024-05-12 13:20:43,067 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 172 predicate places. [2024-05-12 13:20:43,067 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 302 transitions, 3692 flow [2024-05-12 13:20:43,067 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 13:20:43,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:20:43,067 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 13:20:43,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-05-12 13:20:43,067 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:20:43,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:20:43,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1602376943, now seen corresponding path program 7 times [2024-05-12 13:20:43,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:20:43,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603462681] [2024-05-12 13:20:43,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:20:43,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:20:43,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:20:44,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:20:44,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:20:44,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603462681] [2024-05-12 13:20:44,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603462681] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:20:44,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:20:44,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:20:44,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936871403] [2024-05-12 13:20:44,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:20:44,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:20:44,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:20:44,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:20:44,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:20:44,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:20:44,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 302 transitions, 3692 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 13:20:44,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:20:44,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:20:44,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:20:46,510 INFO L124 PetriNetUnfolderBase]: 6167/9964 cut-off events. [2024-05-12 13:20:46,510 INFO L125 PetriNetUnfolderBase]: For 394219/394246 co-relation queries the response was YES. [2024-05-12 13:20:46,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66509 conditions, 9964 events. 6167/9964 cut-off events. For 394219/394246 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 67530 event pairs, 1608 based on Foata normal form. 32/9765 useless extension candidates. Maximal degree in co-relation 66414. Up to 8472 conditions per place. [2024-05-12 13:20:46,610 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 303 selfloop transitions, 48 changer transitions 0/364 dead transitions. [2024-05-12 13:20:46,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 364 transitions, 4685 flow [2024-05-12 13:20:46,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:20:46,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:20:46,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 252 transitions. [2024-05-12 13:20:46,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-05-12 13:20:46,611 INFO L175 Difference]: Start difference. First operand has 227 places, 302 transitions, 3692 flow. Second operand 10 states and 252 transitions. [2024-05-12 13:20:46,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 364 transitions, 4685 flow [2024-05-12 13:20:47,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 364 transitions, 4562 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-05-12 13:20:47,085 INFO L231 Difference]: Finished difference. Result has 229 places, 303 transitions, 3727 flow [2024-05-12 13:20:47,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3569, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3727, PETRI_PLACES=229, PETRI_TRANSITIONS=303} [2024-05-12 13:20:47,086 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 174 predicate places. [2024-05-12 13:20:47,086 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 303 transitions, 3727 flow [2024-05-12 13:20:47,086 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 13:20:47,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:20:47,086 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 13:20:47,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-05-12 13:20:47,086 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:20:47,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:20:47,087 INFO L85 PathProgramCache]: Analyzing trace with hash -18836479, now seen corresponding path program 8 times [2024-05-12 13:20:47,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:20:47,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290286390] [2024-05-12 13:20:47,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:20:47,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:20:47,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:20:48,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:20:48,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:20:48,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290286390] [2024-05-12 13:20:48,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290286390] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:20:48,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:20:48,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:20:48,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875555669] [2024-05-12 13:20:48,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:20:48,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:20:48,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:20:48,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:20:48,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:20:48,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:20:48,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 303 transitions, 3727 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 13:20:48,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:20:48,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:20:48,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:20:50,138 INFO L124 PetriNetUnfolderBase]: 6272/9692 cut-off events. [2024-05-12 13:20:50,138 INFO L125 PetriNetUnfolderBase]: For 409201/409213 co-relation queries the response was YES. [2024-05-12 13:20:50,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67604 conditions, 9692 events. 6272/9692 cut-off events. For 409201/409213 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 61749 event pairs, 1376 based on Foata normal form. 20/9638 useless extension candidates. Maximal degree in co-relation 67508. Up to 8463 conditions per place. [2024-05-12 13:20:50,252 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 243 selfloop transitions, 113 changer transitions 0/369 dead transitions. [2024-05-12 13:20:50,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 369 transitions, 4795 flow [2024-05-12 13:20:50,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:20:50,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:20:50,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 255 transitions. [2024-05-12 13:20:50,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5204081632653061 [2024-05-12 13:20:50,254 INFO L175 Difference]: Start difference. First operand has 229 places, 303 transitions, 3727 flow. Second operand 10 states and 255 transitions. [2024-05-12 13:20:50,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 369 transitions, 4795 flow [2024-05-12 13:20:50,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 369 transitions, 4672 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-05-12 13:20:50,960 INFO L231 Difference]: Finished difference. Result has 231 places, 307 transitions, 3957 flow [2024-05-12 13:20:50,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3604, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3957, PETRI_PLACES=231, PETRI_TRANSITIONS=307} [2024-05-12 13:20:50,961 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 176 predicate places. [2024-05-12 13:20:50,961 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 307 transitions, 3957 flow [2024-05-12 13:20:50,961 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 13:20:50,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:20:50,962 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 13:20:50,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-05-12 13:20:50,962 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:20:50,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:20:50,962 INFO L85 PathProgramCache]: Analyzing trace with hash -18828109, now seen corresponding path program 9 times [2024-05-12 13:20:50,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:20:50,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626037834] [2024-05-12 13:20:50,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:20:50,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:20:50,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:20:52,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:20:52,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:20:52,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626037834] [2024-05-12 13:20:52,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626037834] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:20:52,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:20:52,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:20:52,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052124258] [2024-05-12 13:20:52,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:20:52,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:20:52,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:20:52,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:20:52,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:20:52,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:20:52,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 307 transitions, 3957 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 13:20:52,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:20:52,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:20:52,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:20:54,210 INFO L124 PetriNetUnfolderBase]: 6393/9901 cut-off events. [2024-05-12 13:20:54,210 INFO L125 PetriNetUnfolderBase]: For 421182/421194 co-relation queries the response was YES. [2024-05-12 13:20:54,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69588 conditions, 9901 events. 6393/9901 cut-off events. For 421182/421194 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 63448 event pairs, 1380 based on Foata normal form. 16/9843 useless extension candidates. Maximal degree in co-relation 69491. Up to 8105 conditions per place. [2024-05-12 13:20:54,334 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 242 selfloop transitions, 119 changer transitions 0/374 dead transitions. [2024-05-12 13:20:54,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 374 transitions, 5059 flow [2024-05-12 13:20:54,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:20:54,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:20:54,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 257 transitions. [2024-05-12 13:20:54,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5244897959183673 [2024-05-12 13:20:54,335 INFO L175 Difference]: Start difference. First operand has 231 places, 307 transitions, 3957 flow. Second operand 10 states and 257 transitions. [2024-05-12 13:20:54,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 374 transitions, 5059 flow [2024-05-12 13:20:55,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 374 transitions, 4580 flow, removed 78 selfloop flow, removed 8 redundant places. [2024-05-12 13:20:55,172 INFO L231 Difference]: Finished difference. Result has 233 places, 309 transitions, 3837 flow [2024-05-12 13:20:55,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3478, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3837, PETRI_PLACES=233, PETRI_TRANSITIONS=309} [2024-05-12 13:20:55,173 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 178 predicate places. [2024-05-12 13:20:55,173 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 309 transitions, 3837 flow [2024-05-12 13:20:55,173 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 13:20:55,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:20:55,173 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 13:20:55,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-05-12 13:20:55,174 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:20:55,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:20:55,174 INFO L85 PathProgramCache]: Analyzing trace with hash -449769791, now seen corresponding path program 10 times [2024-05-12 13:20:55,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:20:55,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012465958] [2024-05-12 13:20:55,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:20:55,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:20:55,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:20:56,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:20:56,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:20:56,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012465958] [2024-05-12 13:20:56,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012465958] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:20:56,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:20:56,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:20:56,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097839877] [2024-05-12 13:20:56,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:20:56,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:20:56,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:20:56,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:20:56,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:20:56,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:20:56,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 309 transitions, 3837 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 13:20:56,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:20:56,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:20:56,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:20:58,412 INFO L124 PetriNetUnfolderBase]: 6652/10314 cut-off events. [2024-05-12 13:20:58,413 INFO L125 PetriNetUnfolderBase]: For 470497/470509 co-relation queries the response was YES. [2024-05-12 13:20:58,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73974 conditions, 10314 events. 6652/10314 cut-off events. For 470497/470509 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 66767 event pairs, 1437 based on Foata normal form. 16/10259 useless extension candidates. Maximal degree in co-relation 73878. Up to 8640 conditions per place. [2024-05-12 13:20:58,516 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 201 selfloop transitions, 166 changer transitions 0/380 dead transitions. [2024-05-12 13:20:58,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 380 transitions, 5178 flow [2024-05-12 13:20:58,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:20:58,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:20:58,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 259 transitions. [2024-05-12 13:20:58,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-05-12 13:20:58,518 INFO L175 Difference]: Start difference. First operand has 233 places, 309 transitions, 3837 flow. Second operand 10 states and 259 transitions. [2024-05-12 13:20:58,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 380 transitions, 5178 flow [2024-05-12 13:20:59,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 380 transitions, 4985 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-05-12 13:20:59,156 INFO L231 Difference]: Finished difference. Result has 238 places, 313 transitions, 4156 flow [2024-05-12 13:20:59,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3644, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4156, PETRI_PLACES=238, PETRI_TRANSITIONS=313} [2024-05-12 13:20:59,156 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 183 predicate places. [2024-05-12 13:20:59,156 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 313 transitions, 4156 flow [2024-05-12 13:20:59,157 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 13:20:59,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:20:59,157 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 13:20:59,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-05-12 13:20:59,157 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:20:59,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:20:59,158 INFO L85 PathProgramCache]: Analyzing trace with hash -362027691, now seen corresponding path program 11 times [2024-05-12 13:20:59,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:20:59,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720519042] [2024-05-12 13:20:59,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:20:59,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:20:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:21:00,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:21:00,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:21:00,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720519042] [2024-05-12 13:21:00,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720519042] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:21:00,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:21:00,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:21:00,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154914281] [2024-05-12 13:21:00,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:21:00,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:21:00,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:21:00,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:21:00,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:21:00,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:21:00,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 313 transitions, 4156 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 13:21:00,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:21:00,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:21:00,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:21:02,511 INFO L124 PetriNetUnfolderBase]: 6951/10797 cut-off events. [2024-05-12 13:21:02,511 INFO L125 PetriNetUnfolderBase]: For 519594/519606 co-relation queries the response was YES. [2024-05-12 13:21:02,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79726 conditions, 10797 events. 6951/10797 cut-off events. For 519594/519606 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 70415 event pairs, 1378 based on Foata normal form. 16/10742 useless extension candidates. Maximal degree in co-relation 79627. Up to 6821 conditions per place. [2024-05-12 13:21:02,643 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 183 selfloop transitions, 190 changer transitions 0/386 dead transitions. [2024-05-12 13:21:02,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 386 transitions, 5583 flow [2024-05-12 13:21:02,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:21:02,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:21:02,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 259 transitions. [2024-05-12 13:21:02,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-05-12 13:21:02,645 INFO L175 Difference]: Start difference. First operand has 238 places, 313 transitions, 4156 flow. Second operand 10 states and 259 transitions. [2024-05-12 13:21:02,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 386 transitions, 5583 flow [2024-05-12 13:21:03,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 386 transitions, 5339 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-05-12 13:21:03,681 INFO L231 Difference]: Finished difference. Result has 244 places, 318 transitions, 4604 flow [2024-05-12 13:21:03,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3912, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4604, PETRI_PLACES=244, PETRI_TRANSITIONS=318} [2024-05-12 13:21:03,691 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 189 predicate places. [2024-05-12 13:21:03,691 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 318 transitions, 4604 flow [2024-05-12 13:21:03,691 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 13:21:03,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:21:03,691 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 13:21:03,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-05-12 13:21:03,692 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:21:03,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:21:03,692 INFO L85 PathProgramCache]: Analyzing trace with hash -372155391, now seen corresponding path program 12 times [2024-05-12 13:21:03,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:21:03,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746206688] [2024-05-12 13:21:03,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:21:03,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:21:03,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:21:05,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:21:05,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:21:05,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746206688] [2024-05-12 13:21:05,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746206688] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:21:05,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:21:05,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:21:05,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948587936] [2024-05-12 13:21:05,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:21:05,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:21:05,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:21:05,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:21:05,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:21:05,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:21:05,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 318 transitions, 4604 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 13:21:05,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:21:05,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:21:05,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:21:07,389 INFO L124 PetriNetUnfolderBase]: 6923/10747 cut-off events. [2024-05-12 13:21:07,389 INFO L125 PetriNetUnfolderBase]: For 517755/517767 co-relation queries the response was YES. [2024-05-12 13:21:07,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80570 conditions, 10747 events. 6923/10747 cut-off events. For 517755/517767 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 70245 event pairs, 1527 based on Foata normal form. 20/10696 useless extension candidates. Maximal degree in co-relation 80467. Up to 9278 conditions per place. [2024-05-12 13:21:07,503 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 204 selfloop transitions, 164 changer transitions 0/381 dead transitions. [2024-05-12 13:21:07,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 381 transitions, 5638 flow [2024-05-12 13:21:07,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:21:07,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:21:07,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 254 transitions. [2024-05-12 13:21:07,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5183673469387755 [2024-05-12 13:21:07,505 INFO L175 Difference]: Start difference. First operand has 244 places, 318 transitions, 4604 flow. Second operand 10 states and 254 transitions. [2024-05-12 13:21:07,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 381 transitions, 5638 flow [2024-05-12 13:21:08,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 381 transitions, 5264 flow, removed 89 selfloop flow, removed 5 redundant places. [2024-05-12 13:21:08,421 INFO L231 Difference]: Finished difference. Result has 249 places, 319 transitions, 4625 flow [2024-05-12 13:21:08,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4256, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4625, PETRI_PLACES=249, PETRI_TRANSITIONS=319} [2024-05-12 13:21:08,421 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 194 predicate places. [2024-05-12 13:21:08,421 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 319 transitions, 4625 flow [2024-05-12 13:21:08,422 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 13:21:08,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:21:08,422 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 13:21:08,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-05-12 13:21:08,422 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:21:08,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:21:08,423 INFO L85 PathProgramCache]: Analyzing trace with hash -657255261, now seen corresponding path program 13 times [2024-05-12 13:21:08,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:21:08,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433711349] [2024-05-12 13:21:08,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:21:08,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:21:08,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:21:09,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:21:09,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:21:09,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433711349] [2024-05-12 13:21:09,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433711349] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:21:09,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:21:09,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:21:09,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910255906] [2024-05-12 13:21:09,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:21:09,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:21:09,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:21:09,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:21:09,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:21:09,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:21:09,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 319 transitions, 4625 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 13:21:09,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:21:09,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:21:09,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:21:11,908 INFO L124 PetriNetUnfolderBase]: 7016/10906 cut-off events. [2024-05-12 13:21:11,908 INFO L125 PetriNetUnfolderBase]: For 512330/512342 co-relation queries the response was YES. [2024-05-12 13:21:11,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81354 conditions, 10906 events. 7016/10906 cut-off events. For 512330/512342 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 71636 event pairs, 1550 based on Foata normal form. 20/10855 useless extension candidates. Maximal degree in co-relation 81249. Up to 9657 conditions per place. [2024-05-12 13:21:12,036 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 257 selfloop transitions, 112 changer transitions 0/382 dead transitions. [2024-05-12 13:21:12,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 382 transitions, 5666 flow [2024-05-12 13:21:12,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:21:12,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:21:12,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 254 transitions. [2024-05-12 13:21:12,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5183673469387755 [2024-05-12 13:21:12,038 INFO L175 Difference]: Start difference. First operand has 249 places, 319 transitions, 4625 flow. Second operand 10 states and 254 transitions. [2024-05-12 13:21:12,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 382 transitions, 5666 flow [2024-05-12 13:21:13,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 382 transitions, 5339 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-05-12 13:21:13,014 INFO L231 Difference]: Finished difference. Result has 251 places, 320 transitions, 4594 flow [2024-05-12 13:21:13,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4298, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4594, PETRI_PLACES=251, PETRI_TRANSITIONS=320} [2024-05-12 13:21:13,015 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 196 predicate places. [2024-05-12 13:21:13,015 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 320 transitions, 4594 flow [2024-05-12 13:21:13,015 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 13:21:13,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:21:13,015 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 13:21:13,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-05-12 13:21:13,015 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:21:13,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:21:13,016 INFO L85 PathProgramCache]: Analyzing trace with hash -657246891, now seen corresponding path program 14 times [2024-05-12 13:21:13,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:21:13,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966695233] [2024-05-12 13:21:13,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:21:13,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:21:13,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:21:14,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:21:14,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:21:14,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966695233] [2024-05-12 13:21:14,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966695233] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:21:14,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:21:14,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:21:14,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127028920] [2024-05-12 13:21:14,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:21:14,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:21:14,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:21:14,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:21:14,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:21:14,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:21:14,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 320 transitions, 4594 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 13:21:14,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:21:14,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:21:14,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:21:16,520 INFO L124 PetriNetUnfolderBase]: 7044/10954 cut-off events. [2024-05-12 13:21:16,521 INFO L125 PetriNetUnfolderBase]: For 517564/517576 co-relation queries the response was YES. [2024-05-12 13:21:16,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81665 conditions, 10954 events. 7044/10954 cut-off events. For 517564/517576 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 72037 event pairs, 1528 based on Foata normal form. 16/10899 useless extension candidates. Maximal degree in co-relation 81559. Up to 9324 conditions per place. [2024-05-12 13:21:16,636 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 257 selfloop transitions, 117 changer transitions 0/387 dead transitions. [2024-05-12 13:21:16,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 387 transitions, 5740 flow [2024-05-12 13:21:16,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:21:16,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:21:16,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 256 transitions. [2024-05-12 13:21:16,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5224489795918368 [2024-05-12 13:21:16,638 INFO L175 Difference]: Start difference. First operand has 251 places, 320 transitions, 4594 flow. Second operand 10 states and 256 transitions. [2024-05-12 13:21:16,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 387 transitions, 5740 flow [2024-05-12 13:21:17,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 387 transitions, 5439 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-05-12 13:21:17,725 INFO L231 Difference]: Finished difference. Result has 253 places, 322 transitions, 4666 flow [2024-05-12 13:21:17,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4321, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4666, PETRI_PLACES=253, PETRI_TRANSITIONS=322} [2024-05-12 13:21:17,726 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 198 predicate places. [2024-05-12 13:21:17,726 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 322 transitions, 4666 flow [2024-05-12 13:21:17,726 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 13:21:17,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:21:17,726 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 13:21:17,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-05-12 13:21:17,726 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:21:17,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:21:17,727 INFO L85 PathProgramCache]: Analyzing trace with hash -474982480, now seen corresponding path program 2 times [2024-05-12 13:21:17,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:21:17,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045842145] [2024-05-12 13:21:17,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:21:17,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:21:17,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:21:18,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:21:18,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:21:18,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045842145] [2024-05-12 13:21:18,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045842145] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:21:18,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:21:18,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:21:18,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402685167] [2024-05-12 13:21:18,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:21:18,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:21:18,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:21:18,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:21:18,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:21:18,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:21:18,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 322 transitions, 4666 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:21:18,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:21:18,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:21:18,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:21:20,681 INFO L124 PetriNetUnfolderBase]: 7397/12152 cut-off events. [2024-05-12 13:21:20,681 INFO L125 PetriNetUnfolderBase]: For 507881/507881 co-relation queries the response was YES. [2024-05-12 13:21:20,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83665 conditions, 12152 events. 7397/12152 cut-off events. For 507881/507881 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 86570 event pairs, 2208 based on Foata normal form. 2/11871 useless extension candidates. Maximal degree in co-relation 83558. Up to 10657 conditions per place. [2024-05-12 13:21:20,831 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 305 selfloop transitions, 40 changer transitions 0/354 dead transitions. [2024-05-12 13:21:20,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 354 transitions, 5650 flow [2024-05-12 13:21:20,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:21:20,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:21:20,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-05-12 13:21:20,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48104956268221577 [2024-05-12 13:21:20,832 INFO L175 Difference]: Start difference. First operand has 253 places, 322 transitions, 4666 flow. Second operand 7 states and 165 transitions. [2024-05-12 13:21:20,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 354 transitions, 5650 flow [2024-05-12 13:21:21,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 354 transitions, 5468 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-05-12 13:21:21,704 INFO L231 Difference]: Finished difference. Result has 254 places, 325 transitions, 4618 flow [2024-05-12 13:21:21,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4484, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4618, PETRI_PLACES=254, PETRI_TRANSITIONS=325} [2024-05-12 13:21:21,705 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 199 predicate places. [2024-05-12 13:21:21,705 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 325 transitions, 4618 flow [2024-05-12 13:21:21,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:21:21,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:21:21,705 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 13:21:21,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-05-12 13:21:21,706 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:21:21,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:21:21,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1236670944, now seen corresponding path program 3 times [2024-05-12 13:21:21,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:21:21,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454565157] [2024-05-12 13:21:21,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:21:21,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:21:21,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:21:22,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:21:22,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:21:22,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454565157] [2024-05-12 13:21:22,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454565157] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:21:22,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:21:22,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:21:22,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284946783] [2024-05-12 13:21:22,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:21:22,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:21:22,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:21:22,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:21:22,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:21:22,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:21:22,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 325 transitions, 4618 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:21:22,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:21:22,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:21:22,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:21:24,821 INFO L124 PetriNetUnfolderBase]: 7391/12146 cut-off events. [2024-05-12 13:21:24,821 INFO L125 PetriNetUnfolderBase]: For 504486/504486 co-relation queries the response was YES. [2024-05-12 13:21:24,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83157 conditions, 12146 events. 7391/12146 cut-off events. For 504486/504486 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 86536 event pairs, 2212 based on Foata normal form. 2/11865 useless extension candidates. Maximal degree in co-relation 83048. Up to 10652 conditions per place. [2024-05-12 13:21:24,991 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 303 selfloop transitions, 41 changer transitions 0/353 dead transitions. [2024-05-12 13:21:24,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 353 transitions, 5444 flow [2024-05-12 13:21:24,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:21:24,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:21:24,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-05-12 13:21:24,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4752186588921283 [2024-05-12 13:21:24,993 INFO L175 Difference]: Start difference. First operand has 254 places, 325 transitions, 4618 flow. Second operand 7 states and 163 transitions. [2024-05-12 13:21:24,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 353 transitions, 5444 flow [2024-05-12 13:21:26,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 353 transitions, 5287 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-05-12 13:21:26,005 INFO L231 Difference]: Finished difference. Result has 256 places, 325 transitions, 4549 flow [2024-05-12 13:21:26,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4461, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4549, PETRI_PLACES=256, PETRI_TRANSITIONS=325} [2024-05-12 13:21:26,009 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 201 predicate places. [2024-05-12 13:21:26,010 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 325 transitions, 4549 flow [2024-05-12 13:21:26,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:21:26,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:21:26,010 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 13:21:26,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-05-12 13:21:26,010 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:21:26,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:21:26,011 INFO L85 PathProgramCache]: Analyzing trace with hash -680532723, now seen corresponding path program 1 times [2024-05-12 13:21:26,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:21:26,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284382981] [2024-05-12 13:21:26,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:21:26,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:21:26,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:21:26,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:21:26,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:21:26,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284382981] [2024-05-12 13:21:26,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284382981] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:21:26,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:21:26,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:21:26,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777446109] [2024-05-12 13:21:26,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:21:26,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:21:26,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:21:26,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:21:26,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:21:26,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:21:26,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 325 transitions, 4549 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 13:21:26,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:21:26,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:21:26,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:21:29,004 INFO L124 PetriNetUnfolderBase]: 6608/11161 cut-off events. [2024-05-12 13:21:29,005 INFO L125 PetriNetUnfolderBase]: For 455070/455082 co-relation queries the response was YES. [2024-05-12 13:21:29,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76597 conditions, 11161 events. 6608/11161 cut-off events. For 455070/455082 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 81507 event pairs, 1810 based on Foata normal form. 5/10862 useless extension candidates. Maximal degree in co-relation 76487. Up to 9642 conditions per place. [2024-05-12 13:21:29,135 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 328 selfloop transitions, 15 changer transitions 0/358 dead transitions. [2024-05-12 13:21:29,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 358 transitions, 5379 flow [2024-05-12 13:21:29,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:21:29,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:21:29,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-05-12 13:21:29,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5043731778425656 [2024-05-12 13:21:29,137 INFO L175 Difference]: Start difference. First operand has 256 places, 325 transitions, 4549 flow. Second operand 7 states and 173 transitions. [2024-05-12 13:21:29,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 358 transitions, 5379 flow [2024-05-12 13:21:29,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 358 transitions, 5288 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-05-12 13:21:29,834 INFO L231 Difference]: Finished difference. Result has 257 places, 328 transitions, 4546 flow [2024-05-12 13:21:29,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4458, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4546, PETRI_PLACES=257, PETRI_TRANSITIONS=328} [2024-05-12 13:21:29,834 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 202 predicate places. [2024-05-12 13:21:29,834 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 328 transitions, 4546 flow [2024-05-12 13:21:29,835 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 13:21:29,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:21:29,835 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 13:21:29,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-05-12 13:21:29,835 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:21:29,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:21:29,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1697945477, now seen corresponding path program 1 times [2024-05-12 13:21:29,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:21:29,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975505657] [2024-05-12 13:21:29,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:21:29,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:21:29,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:21:30,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:21:30,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:21:30,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975505657] [2024-05-12 13:21:30,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975505657] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:21:30,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:21:30,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:21:30,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557440306] [2024-05-12 13:21:30,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:21:30,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:21:30,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:21:30,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:21:30,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:21:30,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:21:30,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 328 transitions, 4546 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 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 13:21:30,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:21:30,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:21:30,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:21:32,740 INFO L124 PetriNetUnfolderBase]: 6910/11559 cut-off events. [2024-05-12 13:21:32,740 INFO L125 PetriNetUnfolderBase]: For 468308/468308 co-relation queries the response was YES. [2024-05-12 13:21:32,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78982 conditions, 11559 events. 6910/11559 cut-off events. For 468308/468308 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 83662 event pairs, 1947 based on Foata normal form. 1/11264 useless extension candidates. Maximal degree in co-relation 78871. Up to 10101 conditions per place. [2024-05-12 13:21:32,906 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 330 selfloop transitions, 26 changer transitions 0/366 dead transitions. [2024-05-12 13:21:32,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 366 transitions, 5556 flow [2024-05-12 13:21:32,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:21:32,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:21:32,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-05-12 13:21:32,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49271137026239065 [2024-05-12 13:21:32,907 INFO L175 Difference]: Start difference. First operand has 257 places, 328 transitions, 4546 flow. Second operand 7 states and 169 transitions. [2024-05-12 13:21:32,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 366 transitions, 5556 flow [2024-05-12 13:21:33,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 366 transitions, 5490 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-05-12 13:21:33,725 INFO L231 Difference]: Finished difference. Result has 260 places, 338 transitions, 4657 flow [2024-05-12 13:21:33,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4480, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4657, PETRI_PLACES=260, PETRI_TRANSITIONS=338} [2024-05-12 13:21:33,726 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 205 predicate places. [2024-05-12 13:21:33,726 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 338 transitions, 4657 flow [2024-05-12 13:21:33,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 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 13:21:33,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:21:33,727 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 13:21:33,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-05-12 13:21:33,727 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:21:33,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:21:33,727 INFO L85 PathProgramCache]: Analyzing trace with hash -680528073, now seen corresponding path program 2 times [2024-05-12 13:21:33,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:21:33,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115976068] [2024-05-12 13:21:33,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:21:33,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:21:33,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:21:34,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:21:34,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:21:34,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115976068] [2024-05-12 13:21:34,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115976068] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:21:34,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:21:34,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:21:34,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489774835] [2024-05-12 13:21:34,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:21:34,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:21:34,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:21:34,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:21:34,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:21:34,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:21:34,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 338 transitions, 4657 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 13:21:34,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:21:34,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:21:34,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:21:36,763 INFO L124 PetriNetUnfolderBase]: 6690/11295 cut-off events. [2024-05-12 13:21:36,764 INFO L125 PetriNetUnfolderBase]: For 483525/483543 co-relation queries the response was YES. [2024-05-12 13:21:36,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79057 conditions, 11295 events. 6690/11295 cut-off events. For 483525/483543 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 82604 event pairs, 1828 based on Foata normal form. 1/10971 useless extension candidates. Maximal degree in co-relation 78944. Up to 9688 conditions per place. [2024-05-12 13:21:36,949 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 326 selfloop transitions, 28 changer transitions 0/372 dead transitions. [2024-05-12 13:21:36,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 372 transitions, 5685 flow [2024-05-12 13:21:36,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:21:36,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:21:36,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-05-12 13:21:36,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2024-05-12 13:21:36,951 INFO L175 Difference]: Start difference. First operand has 260 places, 338 transitions, 4657 flow. Second operand 7 states and 175 transitions. [2024-05-12 13:21:36,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 372 transitions, 5685 flow [2024-05-12 13:21:38,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 372 transitions, 5645 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-05-12 13:21:38,037 INFO L231 Difference]: Finished difference. Result has 265 places, 344 transitions, 4793 flow [2024-05-12 13:21:38,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4617, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4793, PETRI_PLACES=265, PETRI_TRANSITIONS=344} [2024-05-12 13:21:38,038 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 210 predicate places. [2024-05-12 13:21:38,038 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 344 transitions, 4793 flow [2024-05-12 13:21:38,039 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 13:21:38,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:21:38,039 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 13:21:38,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-05-12 13:21:38,039 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:21:38,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:21:38,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1451629809, now seen corresponding path program 2 times [2024-05-12 13:21:38,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:21:38,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483824861] [2024-05-12 13:21:38,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:21:38,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:21:38,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:21:38,906 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 13:21:38,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:21:38,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483824861] [2024-05-12 13:21:38,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483824861] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:21:38,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:21:38,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:21:38,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529088619] [2024-05-12 13:21:38,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:21:38,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:21:38,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:21:38,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:21:38,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:21:38,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:21:38,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 344 transitions, 4793 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 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 13:21:38,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:21:38,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:21:38,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:21:41,047 INFO L124 PetriNetUnfolderBase]: 6949/11638 cut-off events. [2024-05-12 13:21:41,048 INFO L125 PetriNetUnfolderBase]: For 502625/502625 co-relation queries the response was YES. [2024-05-12 13:21:41,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81506 conditions, 11638 events. 6949/11638 cut-off events. For 502625/502625 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 84316 event pairs, 2091 based on Foata normal form. 1/11369 useless extension candidates. Maximal degree in co-relation 81390. Up to 10186 conditions per place. [2024-05-12 13:21:41,208 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 338 selfloop transitions, 22 changer transitions 0/370 dead transitions. [2024-05-12 13:21:41,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 370 transitions, 5739 flow [2024-05-12 13:21:41,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:21:41,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:21:41,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-05-12 13:21:41,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4752186588921283 [2024-05-12 13:21:41,209 INFO L175 Difference]: Start difference. First operand has 265 places, 344 transitions, 4793 flow. Second operand 7 states and 163 transitions. [2024-05-12 13:21:41,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 370 transitions, 5739 flow [2024-05-12 13:21:41,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 370 transitions, 5671 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-05-12 13:21:42,001 INFO L231 Difference]: Finished difference. Result has 269 places, 347 transitions, 4811 flow [2024-05-12 13:21:42,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4725, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4811, PETRI_PLACES=269, PETRI_TRANSITIONS=347} [2024-05-12 13:21:42,002 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 214 predicate places. [2024-05-12 13:21:42,002 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 347 transitions, 4811 flow [2024-05-12 13:21:42,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 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 13:21:42,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:21:42,002 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 13:21:42,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-05-12 13:21:42,003 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:21:42,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:21:42,003 INFO L85 PathProgramCache]: Analyzing trace with hash -474790497, now seen corresponding path program 3 times [2024-05-12 13:21:42,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:21:42,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679161610] [2024-05-12 13:21:42,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:21:42,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:21:42,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:21:42,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:21:42,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:21:42,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679161610] [2024-05-12 13:21:42,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679161610] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:21:42,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:21:42,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:21:42,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182960011] [2024-05-12 13:21:42,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:21:42,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:21:42,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:21:42,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:21:42,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:21:42,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:21:42,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 347 transitions, 4811 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 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 13:21:42,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:21:42,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:21:42,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:21:44,906 INFO L124 PetriNetUnfolderBase]: 6946/11635 cut-off events. [2024-05-12 13:21:44,906 INFO L125 PetriNetUnfolderBase]: For 510910/510910 co-relation queries the response was YES. [2024-05-12 13:21:45,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81563 conditions, 11635 events. 6946/11635 cut-off events. For 510910/510910 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 84285 event pairs, 2095 based on Foata normal form. 1/11366 useless extension candidates. Maximal degree in co-relation 81445. Up to 10203 conditions per place. [2024-05-12 13:21:45,063 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 340 selfloop transitions, 17 changer transitions 0/367 dead transitions. [2024-05-12 13:21:45,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 367 transitions, 5581 flow [2024-05-12 13:21:45,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:21:45,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:21:45,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-05-12 13:21:45,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46355685131195334 [2024-05-12 13:21:45,064 INFO L175 Difference]: Start difference. First operand has 269 places, 347 transitions, 4811 flow. Second operand 7 states and 159 transitions. [2024-05-12 13:21:45,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 367 transitions, 5581 flow [2024-05-12 13:21:45,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 367 transitions, 5486 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-05-12 13:21:45,761 INFO L231 Difference]: Finished difference. Result has 271 places, 347 transitions, 4756 flow [2024-05-12 13:21:45,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4716, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4756, PETRI_PLACES=271, PETRI_TRANSITIONS=347} [2024-05-12 13:21:45,762 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 216 predicate places. [2024-05-12 13:21:45,762 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 347 transitions, 4756 flow [2024-05-12 13:21:45,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 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 13:21:45,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:21:45,762 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 13:21:45,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-05-12 13:21:45,763 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:21:45,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:21:45,763 INFO L85 PathProgramCache]: Analyzing trace with hash -474797193, now seen corresponding path program 3 times [2024-05-12 13:21:45,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:21:45,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653556698] [2024-05-12 13:21:45,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:21:45,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:21:45,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:21:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:21:46,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:21:46,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653556698] [2024-05-12 13:21:46,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653556698] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:21:46,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:21:46,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:21:46,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941844438] [2024-05-12 13:21:46,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:21:46,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:21:46,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:21:46,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:21:46,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:21:46,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:21:46,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 347 transitions, 4756 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 13:21:46,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:21:46,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:21:46,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:21:48,602 INFO L124 PetriNetUnfolderBase]: 6675/11308 cut-off events. [2024-05-12 13:21:48,603 INFO L125 PetriNetUnfolderBase]: For 517711/517735 co-relation queries the response was YES. [2024-05-12 13:21:48,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79945 conditions, 11308 events. 6675/11308 cut-off events. For 517711/517735 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 82974 event pairs, 1962 based on Foata normal form. 1/11019 useless extension candidates. Maximal degree in co-relation 79827. Up to 9728 conditions per place. [2024-05-12 13:21:48,753 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 334 selfloop transitions, 16 changer transitions 0/369 dead transitions. [2024-05-12 13:21:48,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 369 transitions, 5528 flow [2024-05-12 13:21:48,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:21:48,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:21:48,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-05-12 13:21:48,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4839650145772595 [2024-05-12 13:21:48,754 INFO L175 Difference]: Start difference. First operand has 271 places, 347 transitions, 4756 flow. Second operand 7 states and 166 transitions. [2024-05-12 13:21:48,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 369 transitions, 5528 flow [2024-05-12 13:21:49,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 369 transitions, 5449 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-05-12 13:21:49,833 INFO L231 Difference]: Finished difference. Result has 272 places, 347 transitions, 4715 flow [2024-05-12 13:21:49,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4677, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4715, PETRI_PLACES=272, PETRI_TRANSITIONS=347} [2024-05-12 13:21:49,834 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 217 predicate places. [2024-05-12 13:21:49,834 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 347 transitions, 4715 flow [2024-05-12 13:21:49,834 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 13:21:49,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:21:49,834 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 13:21:49,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-05-12 13:21:49,835 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:21:49,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:21:49,835 INFO L85 PathProgramCache]: Analyzing trace with hash 620122915, now seen corresponding path program 1 times [2024-05-12 13:21:49,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:21:49,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289747987] [2024-05-12 13:21:49,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:21:49,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:21:49,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:21:51,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:21:51,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:21:51,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289747987] [2024-05-12 13:21:51,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289747987] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:21:51,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:21:51,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:21:51,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720679490] [2024-05-12 13:21:51,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:21:51,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:21:51,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:21:51,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:21:51,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:21:51,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:21:51,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 347 transitions, 4715 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 13:21:51,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:21:51,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:21:51,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:21:53,918 INFO L124 PetriNetUnfolderBase]: 7355/12326 cut-off events. [2024-05-12 13:21:53,918 INFO L125 PetriNetUnfolderBase]: For 625800/625824 co-relation queries the response was YES. [2024-05-12 13:21:54,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87725 conditions, 12326 events. 7355/12326 cut-off events. For 625800/625824 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 89395 event pairs, 1676 based on Foata normal form. 12/12003 useless extension candidates. Maximal degree in co-relation 87606. Up to 10413 conditions per place. [2024-05-12 13:21:54,092 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 373 selfloop transitions, 29 changer transitions 0/420 dead transitions. [2024-05-12 13:21:54,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 420 transitions, 5939 flow [2024-05-12 13:21:54,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 13:21:54,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 13:21:54,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 265 transitions. [2024-05-12 13:21:54,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49165120593692024 [2024-05-12 13:21:54,093 INFO L175 Difference]: Start difference. First operand has 272 places, 347 transitions, 4715 flow. Second operand 11 states and 265 transitions. [2024-05-12 13:21:54,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 420 transitions, 5939 flow [2024-05-12 13:21:55,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 420 transitions, 5885 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-05-12 13:21:55,214 INFO L231 Difference]: Finished difference. Result has 280 places, 355 transitions, 4968 flow [2024-05-12 13:21:55,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4661, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4968, PETRI_PLACES=280, PETRI_TRANSITIONS=355} [2024-05-12 13:21:55,214 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 225 predicate places. [2024-05-12 13:21:55,215 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 355 transitions, 4968 flow [2024-05-12 13:21:55,215 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 13:21:55,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:21:55,215 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 13:21:55,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-05-12 13:21:55,215 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:21:55,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:21:55,216 INFO L85 PathProgramCache]: Analyzing trace with hash -900706461, now seen corresponding path program 2 times [2024-05-12 13:21:55,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:21:55,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754812858] [2024-05-12 13:21:55,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:21:55,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:21:55,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:21:56,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:21:56,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:21:56,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754812858] [2024-05-12 13:21:56,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754812858] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:21:56,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:21:56,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:21:56,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604742073] [2024-05-12 13:21:56,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:21:56,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:21:56,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:21:56,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:21:56,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:21:56,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:21:56,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 355 transitions, 4968 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 13:21:56,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:21:56,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:21:56,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:21:59,261 INFO L124 PetriNetUnfolderBase]: 7483/12406 cut-off events. [2024-05-12 13:21:59,261 INFO L125 PetriNetUnfolderBase]: For 661638/661662 co-relation queries the response was YES. [2024-05-12 13:21:59,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90836 conditions, 12406 events. 7483/12406 cut-off events. For 661638/661662 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 89823 event pairs, 2031 based on Foata normal form. 12/12121 useless extension candidates. Maximal degree in co-relation 90713. Up to 10565 conditions per place. [2024-05-12 13:21:59,455 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 370 selfloop transitions, 48 changer transitions 0/436 dead transitions. [2024-05-12 13:21:59,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 436 transitions, 6367 flow [2024-05-12 13:21:59,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:21:59,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:21:59,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 253 transitions. [2024-05-12 13:21:59,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5163265306122449 [2024-05-12 13:21:59,456 INFO L175 Difference]: Start difference. First operand has 280 places, 355 transitions, 4968 flow. Second operand 10 states and 253 transitions. [2024-05-12 13:21:59,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 436 transitions, 6367 flow [2024-05-12 13:22:00,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 436 transitions, 6176 flow, removed 85 selfloop flow, removed 5 redundant places. [2024-05-12 13:22:00,502 INFO L231 Difference]: Finished difference. Result has 287 places, 368 transitions, 5256 flow [2024-05-12 13:22:00,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4777, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5256, PETRI_PLACES=287, PETRI_TRANSITIONS=368} [2024-05-12 13:22:00,502 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 232 predicate places. [2024-05-12 13:22:00,502 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 368 transitions, 5256 flow [2024-05-12 13:22:00,503 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 13:22:00,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:22:00,503 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 13:22:00,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-05-12 13:22:00,503 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:22:00,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:22:00,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1240559269, now seen corresponding path program 3 times [2024-05-12 13:22:00,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:22:00,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411056517] [2024-05-12 13:22:00,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:22:00,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:22:00,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:22:01,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:22:01,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:22:01,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411056517] [2024-05-12 13:22:01,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411056517] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:22:01,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:22:01,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:22:01,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961808173] [2024-05-12 13:22:01,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:22:01,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:22:01,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:22:01,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:22:01,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:22:01,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:22:01,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 368 transitions, 5256 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 13:22:01,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:22:01,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:22:01,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:22:04,463 INFO L124 PetriNetUnfolderBase]: 7584/12601 cut-off events. [2024-05-12 13:22:04,463 INFO L125 PetriNetUnfolderBase]: For 688157/688181 co-relation queries the response was YES. [2024-05-12 13:22:04,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92819 conditions, 12601 events. 7584/12601 cut-off events. For 688157/688181 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 91606 event pairs, 2146 based on Foata normal form. 12/12307 useless extension candidates. Maximal degree in co-relation 92692. Up to 10834 conditions per place. [2024-05-12 13:22:04,896 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 385 selfloop transitions, 33 changer transitions 0/436 dead transitions. [2024-05-12 13:22:04,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 436 transitions, 6463 flow [2024-05-12 13:22:04,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 13:22:04,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 13:22:04,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 265 transitions. [2024-05-12 13:22:04,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49165120593692024 [2024-05-12 13:22:04,897 INFO L175 Difference]: Start difference. First operand has 287 places, 368 transitions, 5256 flow. Second operand 11 states and 265 transitions. [2024-05-12 13:22:04,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 436 transitions, 6463 flow [2024-05-12 13:22:05,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 436 transitions, 6139 flow, removed 148 selfloop flow, removed 4 redundant places. [2024-05-12 13:22:05,781 INFO L231 Difference]: Finished difference. Result has 295 places, 372 transitions, 5176 flow [2024-05-12 13:22:05,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5008, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5176, PETRI_PLACES=295, PETRI_TRANSITIONS=372} [2024-05-12 13:22:05,782 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 240 predicate places. [2024-05-12 13:22:05,783 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 372 transitions, 5176 flow [2024-05-12 13:22:05,783 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 13:22:05,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:22:05,783 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 13:22:05,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-05-12 13:22:05,783 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:22:05,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:22:05,784 INFO L85 PathProgramCache]: Analyzing trace with hash -155415293, now seen corresponding path program 4 times [2024-05-12 13:22:05,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:22:05,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172628373] [2024-05-12 13:22:05,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:22:05,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:22:05,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:22:07,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:22:07,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:22:07,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172628373] [2024-05-12 13:22:07,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172628373] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:22:07,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:22:07,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:22:07,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951546788] [2024-05-12 13:22:07,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:22:07,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:22:07,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:22:07,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:22:07,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:22:07,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:22:07,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 372 transitions, 5176 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 13:22:07,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:22:07,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:22:07,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:22:10,181 INFO L124 PetriNetUnfolderBase]: 7714/12817 cut-off events. [2024-05-12 13:22:10,181 INFO L125 PetriNetUnfolderBase]: For 697672/697696 co-relation queries the response was YES. [2024-05-12 13:22:10,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93618 conditions, 12817 events. 7714/12817 cut-off events. For 697672/697696 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 93470 event pairs, 2186 based on Foata normal form. 12/12521 useless extension candidates. Maximal degree in co-relation 93488. Up to 11022 conditions per place. [2024-05-12 13:22:10,380 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 392 selfloop transitions, 27 changer transitions 0/437 dead transitions. [2024-05-12 13:22:10,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 437 transitions, 6300 flow [2024-05-12 13:22:10,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:22:10,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:22:10,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 248 transitions. [2024-05-12 13:22:10,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5061224489795918 [2024-05-12 13:22:10,382 INFO L175 Difference]: Start difference. First operand has 295 places, 372 transitions, 5176 flow. Second operand 10 states and 248 transitions. [2024-05-12 13:22:10,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 437 transitions, 6300 flow [2024-05-12 13:22:11,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 437 transitions, 6199 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-05-12 13:22:11,571 INFO L231 Difference]: Finished difference. Result has 298 places, 375 transitions, 5210 flow [2024-05-12 13:22:11,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5075, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5210, PETRI_PLACES=298, PETRI_TRANSITIONS=375} [2024-05-12 13:22:11,571 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 243 predicate places. [2024-05-12 13:22:11,571 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 375 transitions, 5210 flow [2024-05-12 13:22:11,572 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 13:22:11,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:22:11,572 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 13:22:11,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-05-12 13:22:11,572 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:22:11,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:22:11,572 INFO L85 PathProgramCache]: Analyzing trace with hash -910660727, now seen corresponding path program 5 times [2024-05-12 13:22:11,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:22:11,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507710528] [2024-05-12 13:22:11,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:22:11,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:22:11,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:22:12,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:22:12,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:22:12,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507710528] [2024-05-12 13:22:12,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507710528] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:22:12,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:22:12,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:22:12,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459078154] [2024-05-12 13:22:12,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:22:12,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:22:12,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:22:12,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:22:12,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:22:13,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:22:13,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 375 transitions, 5210 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 13:22:13,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:22:13,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:22:13,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:22:15,874 INFO L124 PetriNetUnfolderBase]: 7807/12994 cut-off events. [2024-05-12 13:22:15,874 INFO L125 PetriNetUnfolderBase]: For 714052/714076 co-relation queries the response was YES. [2024-05-12 13:22:16,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94796 conditions, 12994 events. 7807/12994 cut-off events. For 714052/714076 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 95022 event pairs, 2215 based on Foata normal form. 12/12690 useless extension candidates. Maximal degree in co-relation 94664. Up to 11118 conditions per place. [2024-05-12 13:22:16,067 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 387 selfloop transitions, 35 changer transitions 0/440 dead transitions. [2024-05-12 13:22:16,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 440 transitions, 6347 flow [2024-05-12 13:22:16,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:22:16,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:22:16,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 250 transitions. [2024-05-12 13:22:16,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2024-05-12 13:22:16,068 INFO L175 Difference]: Start difference. First operand has 298 places, 375 transitions, 5210 flow. Second operand 10 states and 250 transitions. [2024-05-12 13:22:16,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 440 transitions, 6347 flow [2024-05-12 13:22:17,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 440 transitions, 6258 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-05-12 13:22:17,344 INFO L231 Difference]: Finished difference. Result has 302 places, 377 transitions, 5267 flow [2024-05-12 13:22:17,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5121, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5267, PETRI_PLACES=302, PETRI_TRANSITIONS=377} [2024-05-12 13:22:17,345 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 247 predicate places. [2024-05-12 13:22:17,345 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 377 transitions, 5267 flow [2024-05-12 13:22:17,345 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 13:22:17,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:22:17,345 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 13:22:17,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-05-12 13:22:17,346 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:22:17,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:22:17,346 INFO L85 PathProgramCache]: Analyzing trace with hash -916167257, now seen corresponding path program 6 times [2024-05-12 13:22:17,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:22:17,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233031750] [2024-05-12 13:22:17,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:22:17,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:22:17,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:22:18,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:22:18,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:22:18,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233031750] [2024-05-12 13:22:18,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233031750] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:22:18,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:22:18,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:22:18,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763811754] [2024-05-12 13:22:18,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:22:18,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:22:18,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:22:18,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:22:18,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:22:19,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:22:19,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 377 transitions, 5267 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 13:22:19,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:22:19,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:22:19,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:22:22,211 INFO L124 PetriNetUnfolderBase]: 7900/13113 cut-off events. [2024-05-12 13:22:22,212 INFO L125 PetriNetUnfolderBase]: For 733635/733659 co-relation queries the response was YES. [2024-05-12 13:22:22,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96060 conditions, 13113 events. 7900/13113 cut-off events. For 733635/733659 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 95812 event pairs, 2209 based on Foata normal form. 12/12817 useless extension candidates. Maximal degree in co-relation 95926. Up to 11154 conditions per place. [2024-05-12 13:22:22,392 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 386 selfloop transitions, 40 changer transitions 0/444 dead transitions. [2024-05-12 13:22:22,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 444 transitions, 6431 flow [2024-05-12 13:22:22,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:22:22,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:22:22,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 251 transitions. [2024-05-12 13:22:22,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5122448979591837 [2024-05-12 13:22:22,400 INFO L175 Difference]: Start difference. First operand has 302 places, 377 transitions, 5267 flow. Second operand 10 states and 251 transitions. [2024-05-12 13:22:22,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 444 transitions, 6431 flow [2024-05-12 13:22:23,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 444 transitions, 6320 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-05-12 13:22:23,423 INFO L231 Difference]: Finished difference. Result has 306 places, 380 transitions, 5335 flow [2024-05-12 13:22:23,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5156, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5335, PETRI_PLACES=306, PETRI_TRANSITIONS=380} [2024-05-12 13:22:23,423 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 251 predicate places. [2024-05-12 13:22:23,424 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 380 transitions, 5335 flow [2024-05-12 13:22:23,424 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 13:22:23,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:22:23,424 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 13:22:23,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-05-12 13:22:23,424 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:22:23,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:22:23,425 INFO L85 PathProgramCache]: Analyzing trace with hash -858630971, now seen corresponding path program 1 times [2024-05-12 13:22:23,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:22:23,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160510281] [2024-05-12 13:22:23,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:22:23,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:22:23,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:22:24,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:22:24,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:22:24,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160510281] [2024-05-12 13:22:24,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160510281] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:22:24,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:22:24,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:22:24,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551937944] [2024-05-12 13:22:24,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:22:24,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:22:24,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:22:24,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:22:24,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:22:24,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:22:24,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 380 transitions, 5335 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 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 13:22:24,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:22:24,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:22:24,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:22:26,739 INFO L124 PetriNetUnfolderBase]: 7974/13286 cut-off events. [2024-05-12 13:22:26,740 INFO L125 PetriNetUnfolderBase]: For 731456/731480 co-relation queries the response was YES. [2024-05-12 13:22:26,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97009 conditions, 13286 events. 7974/13286 cut-off events. For 731456/731480 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 97703 event pairs, 2305 based on Foata normal form. 2/12962 useless extension candidates. Maximal degree in co-relation 96873. Up to 11554 conditions per place. [2024-05-12 13:22:26,924 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 379 selfloop transitions, 29 changer transitions 0/426 dead transitions. [2024-05-12 13:22:26,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 426 transitions, 6577 flow [2024-05-12 13:22:26,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:22:26,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:22:26,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-05-12 13:22:26,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2024-05-12 13:22:26,926 INFO L175 Difference]: Start difference. First operand has 306 places, 380 transitions, 5335 flow. Second operand 7 states and 175 transitions. [2024-05-12 13:22:26,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 426 transitions, 6577 flow [2024-05-12 13:22:28,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 426 transitions, 6433 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-05-12 13:22:28,179 INFO L231 Difference]: Finished difference. Result has 305 places, 392 transitions, 5443 flow [2024-05-12 13:22:28,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5191, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5443, PETRI_PLACES=305, PETRI_TRANSITIONS=392} [2024-05-12 13:22:28,180 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 250 predicate places. [2024-05-12 13:22:28,180 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 392 transitions, 5443 flow [2024-05-12 13:22:28,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 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 13:22:28,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:22:28,180 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 13:22:28,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-05-12 13:22:28,181 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:22:28,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:22:28,181 INFO L85 PathProgramCache]: Analyzing trace with hash 290919049, now seen corresponding path program 2 times [2024-05-12 13:22:28,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:22:28,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892200926] [2024-05-12 13:22:28,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:22:28,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:22:28,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:22:28,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:22:28,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:22:28,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892200926] [2024-05-12 13:22:28,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892200926] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:22:28,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:22:28,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:22:28,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963910084] [2024-05-12 13:22:28,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:22:28,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:22:28,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:22:28,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:22:28,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:22:28,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:22:28,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 392 transitions, 5443 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 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 13:22:28,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:22:28,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:22:28,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:22:31,565 INFO L124 PetriNetUnfolderBase]: 8035/13399 cut-off events. [2024-05-12 13:22:31,566 INFO L125 PetriNetUnfolderBase]: For 745585/745615 co-relation queries the response was YES. [2024-05-12 13:22:31,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98718 conditions, 13399 events. 8035/13399 cut-off events. For 745585/745615 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 98502 event pairs, 2323 based on Foata normal form. 8/13076 useless extension candidates. Maximal degree in co-relation 98582. Up to 11696 conditions per place. [2024-05-12 13:22:31,776 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 381 selfloop transitions, 33 changer transitions 0/432 dead transitions. [2024-05-12 13:22:31,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 432 transitions, 6617 flow [2024-05-12 13:22:31,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:22:31,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:22:31,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-05-12 13:22:31,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-05-12 13:22:31,777 INFO L175 Difference]: Start difference. First operand has 305 places, 392 transitions, 5443 flow. Second operand 8 states and 182 transitions. [2024-05-12 13:22:31,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 432 transitions, 6617 flow [2024-05-12 13:22:32,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 432 transitions, 6458 flow, removed 74 selfloop flow, removed 2 redundant places. [2024-05-12 13:22:32,827 INFO L231 Difference]: Finished difference. Result has 314 places, 408 transitions, 5654 flow [2024-05-12 13:22:32,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5349, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5654, PETRI_PLACES=314, PETRI_TRANSITIONS=408} [2024-05-12 13:22:32,827 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 259 predicate places. [2024-05-12 13:22:32,827 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 408 transitions, 5654 flow [2024-05-12 13:22:32,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 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 13:22:32,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:22:32,828 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 13:22:32,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-05-12 13:22:32,828 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:22:32,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:22:32,828 INFO L85 PathProgramCache]: Analyzing trace with hash 751697417, now seen corresponding path program 3 times [2024-05-12 13:22:32,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:22:32,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253899193] [2024-05-12 13:22:32,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:22:32,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:22:32,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:22:33,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:22:33,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:22:33,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253899193] [2024-05-12 13:22:33,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253899193] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:22:33,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:22:33,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:22:33,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274262629] [2024-05-12 13:22:33,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:22:33,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:22:33,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:22:33,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:22:33,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:22:33,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:22:33,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 408 transitions, 5654 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 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 13:22:33,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:22:33,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:22:33,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:22:36,471 INFO L124 PetriNetUnfolderBase]: 8163/13636 cut-off events. [2024-05-12 13:22:36,471 INFO L125 PetriNetUnfolderBase]: For 763047/763071 co-relation queries the response was YES. [2024-05-12 13:22:36,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100078 conditions, 13636 events. 8163/13636 cut-off events. For 763047/763071 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 100804 event pairs, 3002 based on Foata normal form. 2/13290 useless extension candidates. Maximal degree in co-relation 99937. Up to 11833 conditions per place. [2024-05-12 13:22:36,715 INFO L140 encePairwiseOnDemand]: 35/49 looper letters, 390 selfloop transitions, 55 changer transitions 0/463 dead transitions. [2024-05-12 13:22:36,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 463 transitions, 6964 flow [2024-05-12 13:22:36,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:22:36,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:22:36,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-05-12 13:22:36,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4923469387755102 [2024-05-12 13:22:36,716 INFO L175 Difference]: Start difference. First operand has 314 places, 408 transitions, 5654 flow. Second operand 8 states and 193 transitions. [2024-05-12 13:22:36,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 463 transitions, 6964 flow [2024-05-12 13:22:38,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 463 transitions, 6857 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-05-12 13:22:38,133 INFO L231 Difference]: Finished difference. Result has 322 places, 433 transitions, 6040 flow [2024-05-12 13:22:38,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5597, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6040, PETRI_PLACES=322, PETRI_TRANSITIONS=433} [2024-05-12 13:22:38,135 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 267 predicate places. [2024-05-12 13:22:38,135 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 433 transitions, 6040 flow [2024-05-12 13:22:38,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 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 13:22:38,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:22:38,135 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 13:22:38,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-05-12 13:22:38,136 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:22:38,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:22:38,136 INFO L85 PathProgramCache]: Analyzing trace with hash -34379484, now seen corresponding path program 1 times [2024-05-12 13:22:38,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:22:38,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901325046] [2024-05-12 13:22:38,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:22:38,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:22:38,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:22:39,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:22:39,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:22:39,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901325046] [2024-05-12 13:22:39,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901325046] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:22:39,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:22:39,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:22:39,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931355169] [2024-05-12 13:22:39,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:22:39,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:22:39,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:22:39,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:22:39,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:22:39,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:22:39,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 433 transitions, 6040 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:22:39,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:22:39,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:22:39,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:22:43,190 INFO L124 PetriNetUnfolderBase]: 8650/14318 cut-off events. [2024-05-12 13:22:43,201 INFO L125 PetriNetUnfolderBase]: For 783110/783110 co-relation queries the response was YES. [2024-05-12 13:22:43,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104820 conditions, 14318 events. 8650/14318 cut-off events. For 783110/783110 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 105001 event pairs, 2672 based on Foata normal form. 2/13967 useless extension candidates. Maximal degree in co-relation 104675. Up to 12193 conditions per place. [2024-05-12 13:22:43,413 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 431 selfloop transitions, 90 changer transitions 0/530 dead transitions. [2024-05-12 13:22:43,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 530 transitions, 8033 flow [2024-05-12 13:22:43,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:22:43,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:22:43,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-05-12 13:22:43,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5011337868480725 [2024-05-12 13:22:43,415 INFO L175 Difference]: Start difference. First operand has 322 places, 433 transitions, 6040 flow. Second operand 9 states and 221 transitions. [2024-05-12 13:22:43,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 530 transitions, 8033 flow [2024-05-12 13:22:44,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 530 transitions, 7913 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-05-12 13:22:44,866 INFO L231 Difference]: Finished difference. Result has 332 places, 475 transitions, 6712 flow [2024-05-12 13:22:44,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5920, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6712, PETRI_PLACES=332, PETRI_TRANSITIONS=475} [2024-05-12 13:22:44,866 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 277 predicate places. [2024-05-12 13:22:44,866 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 475 transitions, 6712 flow [2024-05-12 13:22:44,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:22:44,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:22:44,867 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 13:22:44,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-05-12 13:22:44,867 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:22:44,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:22:44,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1506051212, now seen corresponding path program 2 times [2024-05-12 13:22:44,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:22:44,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168452503] [2024-05-12 13:22:44,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:22:44,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:22:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:22:45,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:22:45,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:22:45,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168452503] [2024-05-12 13:22:45,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168452503] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:22:45,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:22:45,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:22:45,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288619834] [2024-05-12 13:22:45,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:22:45,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:22:45,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:22:45,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:22:45,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:22:45,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 13:22:45,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 475 transitions, 6712 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:22:45,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:22:45,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 13:22:45,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:22:49,654 INFO L124 PetriNetUnfolderBase]: 8706/14380 cut-off events. [2024-05-12 13:22:49,655 INFO L125 PetriNetUnfolderBase]: For 808446/808446 co-relation queries the response was YES. [2024-05-12 13:22:49,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108028 conditions, 14380 events. 8706/14380 cut-off events. For 808446/808446 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 105412 event pairs, 2406 based on Foata normal form. 2/14034 useless extension candidates. Maximal degree in co-relation 107877. Up to 12243 conditions per place. [2024-05-12 13:22:49,925 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 417 selfloop transitions, 99 changer transitions 0/525 dead transitions. [2024-05-12 13:22:49,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 525 transitions, 8288 flow [2024-05-12 13:22:49,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:22:49,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:22:49,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-05-12 13:22:49,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4923469387755102 [2024-05-12 13:22:49,927 INFO L175 Difference]: Start difference. First operand has 332 places, 475 transitions, 6712 flow. Second operand 8 states and 193 transitions. [2024-05-12 13:22:49,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 525 transitions, 8288 flow [2024-05-12 13:22:51,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 525 transitions, 8212 flow, removed 37 selfloop flow, removed 1 redundant places. [2024-05-12 13:22:51,846 INFO L231 Difference]: Finished difference. Result has 339 places, 481 transitions, 6957 flow [2024-05-12 13:22:51,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6654, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6957, PETRI_PLACES=339, PETRI_TRANSITIONS=481} [2024-05-12 13:22:51,847 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 284 predicate places. [2024-05-12 13:22:51,847 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 481 transitions, 6957 flow [2024-05-12 13:22:51,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:22:51,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:22:51,847 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 13:22:51,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-05-12 13:22:51,847 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:22:51,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:22:51,848 INFO L85 PathProgramCache]: Analyzing trace with hash -785233679, now seen corresponding path program 7 times [2024-05-12 13:22:51,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:22:51,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722722895] [2024-05-12 13:22:51,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:22:51,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:22:51,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:22:53,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:22:53,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:22:53,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722722895] [2024-05-12 13:22:53,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722722895] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:22:53,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:22:53,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:22:53,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239936921] [2024-05-12 13:22:53,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:22:53,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:22:53,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:22:53,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:22:53,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:22:53,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:22:53,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 481 transitions, 6957 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 13:22:53,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:22:53,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:22:53,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:22:57,660 INFO L124 PetriNetUnfolderBase]: 8537/14081 cut-off events. [2024-05-12 13:22:57,660 INFO L125 PetriNetUnfolderBase]: For 850323/850347 co-relation queries the response was YES. [2024-05-12 13:22:57,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108413 conditions, 14081 events. 8537/14081 cut-off events. For 850323/850347 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 102631 event pairs, 2012 based on Foata normal form. 12/13709 useless extension candidates. Maximal degree in co-relation 108259. Up to 11936 conditions per place. [2024-05-12 13:22:57,858 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 463 selfloop transitions, 65 changer transitions 0/547 dead transitions. [2024-05-12 13:22:57,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 547 transitions, 8407 flow [2024-05-12 13:22:57,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:22:57,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:22:57,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 251 transitions. [2024-05-12 13:22:57,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5122448979591837 [2024-05-12 13:22:57,860 INFO L175 Difference]: Start difference. First operand has 339 places, 481 transitions, 6957 flow. Second operand 10 states and 251 transitions. [2024-05-12 13:22:57,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 547 transitions, 8407 flow [2024-05-12 13:23:00,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 547 transitions, 8212 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-05-12 13:23:00,173 INFO L231 Difference]: Finished difference. Result has 344 places, 484 transitions, 6979 flow [2024-05-12 13:23:00,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6762, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6979, PETRI_PLACES=344, PETRI_TRANSITIONS=484} [2024-05-12 13:23:00,174 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 289 predicate places. [2024-05-12 13:23:00,174 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 484 transitions, 6979 flow [2024-05-12 13:23:00,174 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 13:23:00,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:23:00,174 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 13:23:00,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-05-12 13:23:00,175 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:23:00,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:23:00,175 INFO L85 PathProgramCache]: Analyzing trace with hash -790740209, now seen corresponding path program 8 times [2024-05-12 13:23:00,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:23:00,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069445844] [2024-05-12 13:23:00,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:23:00,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:23:00,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:23:01,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:23:01,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:23:01,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069445844] [2024-05-12 13:23:01,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069445844] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:23:01,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:23:01,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:23:01,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925406088] [2024-05-12 13:23:01,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:23:01,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:23:01,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:23:01,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:23:01,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:23:01,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:23:01,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 484 transitions, 6979 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 13:23:01,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:23:01,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:23:01,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:23:05,609 INFO L124 PetriNetUnfolderBase]: 8525/14215 cut-off events. [2024-05-12 13:23:05,609 INFO L125 PetriNetUnfolderBase]: For 838369/838400 co-relation queries the response was YES. [2024-05-12 13:23:05,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107708 conditions, 14215 events. 8525/14215 cut-off events. For 838369/838400 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 105065 event pairs, 2598 based on Foata normal form. 18/13830 useless extension candidates. Maximal degree in co-relation 107553. Up to 11865 conditions per place. [2024-05-12 13:23:05,836 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 468 selfloop transitions, 63 changer transitions 0/550 dead transitions. [2024-05-12 13:23:05,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 550 transitions, 8439 flow [2024-05-12 13:23:05,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:23:05,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:23:05,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 251 transitions. [2024-05-12 13:23:05,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5122448979591837 [2024-05-12 13:23:05,838 INFO L175 Difference]: Start difference. First operand has 344 places, 484 transitions, 6979 flow. Second operand 10 states and 251 transitions. [2024-05-12 13:23:05,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 550 transitions, 8439 flow [2024-05-12 13:23:08,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 550 transitions, 8268 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-05-12 13:23:08,177 INFO L231 Difference]: Finished difference. Result has 348 places, 488 transitions, 7047 flow [2024-05-12 13:23:08,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6808, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7047, PETRI_PLACES=348, PETRI_TRANSITIONS=488} [2024-05-12 13:23:08,178 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 293 predicate places. [2024-05-12 13:23:08,178 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 488 transitions, 7047 flow [2024-05-12 13:23:08,178 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 13:23:08,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:23:08,178 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 13:23:08,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-05-12 13:23:08,178 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:23:08,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:23:08,179 INFO L85 PathProgramCache]: Analyzing trace with hash -591294269, now seen corresponding path program 9 times [2024-05-12 13:23:08,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:23:08,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881904398] [2024-05-12 13:23:08,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:23:08,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:23:08,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:23:09,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:23:09,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:23:09,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881904398] [2024-05-12 13:23:09,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881904398] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:23:09,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:23:09,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:23:09,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008943890] [2024-05-12 13:23:09,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:23:09,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:23:09,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:23:09,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:23:09,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:23:09,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:23:09,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 488 transitions, 7047 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 13:23:09,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:23:09,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:23:09,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:23:13,539 INFO L124 PetriNetUnfolderBase]: 8505/14207 cut-off events. [2024-05-12 13:23:13,540 INFO L125 PetriNetUnfolderBase]: For 820570/820601 co-relation queries the response was YES. [2024-05-12 13:23:13,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106609 conditions, 14207 events. 8505/14207 cut-off events. For 820570/820601 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 105211 event pairs, 2628 based on Foata normal form. 18/13814 useless extension candidates. Maximal degree in co-relation 106452. Up to 11978 conditions per place. [2024-05-12 13:23:13,776 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 474 selfloop transitions, 56 changer transitions 0/549 dead transitions. [2024-05-12 13:23:13,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 549 transitions, 8312 flow [2024-05-12 13:23:13,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:23:13,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:23:13,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 250 transitions. [2024-05-12 13:23:13,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2024-05-12 13:23:13,778 INFO L175 Difference]: Start difference. First operand has 348 places, 488 transitions, 7047 flow. Second operand 10 states and 250 transitions. [2024-05-12 13:23:13,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 549 transitions, 8312 flow [2024-05-12 13:23:15,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 549 transitions, 8112 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-05-12 13:23:15,902 INFO L231 Difference]: Finished difference. Result has 351 places, 488 transitions, 6869 flow [2024-05-12 13:23:15,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6741, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6869, PETRI_PLACES=351, PETRI_TRANSITIONS=488} [2024-05-12 13:23:15,903 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 296 predicate places. [2024-05-12 13:23:15,903 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 488 transitions, 6869 flow [2024-05-12 13:23:15,904 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 13:23:15,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:23:15,904 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 13:23:15,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-05-12 13:23:15,904 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:23:15,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:23:15,905 INFO L85 PathProgramCache]: Analyzing trace with hash 366078213, now seen corresponding path program 4 times [2024-05-12 13:23:15,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:23:15,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221811008] [2024-05-12 13:23:15,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:23:15,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:23:15,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat