./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe009_power.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe009_power.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/safe009_power.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe009_power.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 --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 17:24:54,241 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 17:24:54,311 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 17:24:54,315 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 17:24:54,316 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 17:24:54,334 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 17:24:54,335 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 17:24:54,335 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 17:24:54,336 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 17:24:54,336 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 17:24:54,336 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 17:24:54,337 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 17:24:54,337 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 17:24:54,338 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 17:24:54,338 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 17:24:54,338 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 17:24:54,339 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 17:24:54,339 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 17:24:54,340 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 17:24:54,340 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 17:24:54,340 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 17:24:54,341 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 17:24:54,341 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 17:24:54,341 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 17:24:54,342 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 17:24:54,342 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 17:24:54,342 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 17:24:54,343 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 17:24:54,343 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 17:24:54,343 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 17:24:54,344 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 17:24:54,344 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 17:24:54,344 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:24:54,344 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 17:24:54,345 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 17:24:54,345 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 17:24:54,345 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 17:24:54,345 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 17:24:54,346 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 17:24:54,346 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 17:24:54,346 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 17:24:54,346 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 17:24:54,347 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 17:24:54,347 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 17:24:54,602 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 17:24:54,622 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 17:24:54,625 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 17:24:54,626 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 17:24:54,626 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 17:24:54,627 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe009_power.opt.i [2024-06-21 17:24:55,836 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 17:24:56,107 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 17:24:56,108 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe009_power.opt.i [2024-06-21 17:24:56,129 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6749f9de/6b358d2a6a0b42a192b5d68f313f539b/FLAG44ad50242 [2024-06-21 17:24:56,141 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6749f9de/6b358d2a6a0b42a192b5d68f313f539b [2024-06-21 17:24:56,143 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 17:24:56,145 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 17:24:56,146 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe009_power.opt.yml/witness.yml [2024-06-21 17:24:56,333 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 17:24:56,334 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 17:24:56,336 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 17:24:56,336 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 17:24:56,340 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 17:24:56,341 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:24:56" (1/2) ... [2024-06-21 17:24:56,342 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46b74d49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:24:56, skipping insertion in model container [2024-06-21 17:24:56,342 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:24:56" (1/2) ... [2024-06-21 17:24:56,343 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6105d7e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:24:56, skipping insertion in model container [2024-06-21 17:24:56,343 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:24:56" (2/2) ... [2024-06-21 17:24:56,344 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46b74d49 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:24:56, skipping insertion in model container [2024-06-21 17:24:56,344 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:24:56" (2/2) ... [2024-06-21 17:24:56,344 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 17:24:56,478 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 17:24:56,479 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] (((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd3 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (__unbuffered_p1_EAX$read_delayed_var == & x && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-21 17:24:56,479 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] (((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd3 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (__unbuffered_p1_EAX$read_delayed_var == & x && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-21 17:24:56,480 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] (((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd3 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (__unbuffered_p1_EAX$read_delayed_var == & x && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-21 17:24:56,480 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 17:24:56,480 INFO L106 edCorrectnessWitness]: ghost_update [L849-L849] multithreaded = 1; [2024-06-21 17:24:56,517 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 17:24:56,909 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:24:56,928 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 17:24:57,078 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:24:57,120 INFO L206 MainTranslator]: Completed translation [2024-06-21 17:24:57,120 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:24:57 WrapperNode [2024-06-21 17:24:57,121 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 17:24:57,121 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 17:24:57,122 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 17:24:57,122 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 17:24:57,128 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 21.06 05:24:57" (1/1) ... [2024-06-21 17:24:57,163 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 21.06 05:24:57" (1/1) ... [2024-06-21 17:24:57,198 INFO L138 Inliner]: procedures = 175, calls = 72, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 217 [2024-06-21 17:24:57,198 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 17:24:57,199 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 17:24:57,199 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 17:24:57,199 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 17:24:57,212 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:24:57" (1/1) ... [2024-06-21 17:24:57,212 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:24:57" (1/1) ... [2024-06-21 17:24:57,217 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:24:57" (1/1) ... [2024-06-21 17:24:57,245 INFO L175 MemorySlicer]: Split 32 memory accesses to 2 slices as follows [2, 30]. 94 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 6 writes are split as follows [0, 6]. [2024-06-21 17:24:57,246 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:24:57" (1/1) ... [2024-06-21 17:24:57,246 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:24:57" (1/1) ... [2024-06-21 17:24:57,258 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:24:57" (1/1) ... [2024-06-21 17:24:57,260 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:24:57" (1/1) ... [2024-06-21 17:24:57,263 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:24:57" (1/1) ... [2024-06-21 17:24:57,265 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:24:57" (1/1) ... [2024-06-21 17:24:57,270 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 17:24:57,271 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 17:24:57,271 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 17:24:57,271 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 17:24:57,272 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:24:57" (1/1) ... [2024-06-21 17:24:57,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:24:57,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 17:24:57,313 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) [2024-06-21 17:24:57,318 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 [2024-06-21 17:24:57,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 17:24:57,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 17:24:57,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 17:24:57,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 17:24:57,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 17:24:57,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 17:24:57,354 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 17:24:57,354 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 17:24:57,355 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 17:24:57,355 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 17:24:57,355 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 17:24:57,355 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 17:24:57,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 17:24:57,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 17:24:57,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 17:24:57,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 17:24:57,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 17:24:57,359 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 17:24:57,530 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 17:24:57,532 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 17:24:58,012 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 17:24:58,013 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 17:24:58,440 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 17:24:58,440 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 17:24:58,441 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:24:58 BoogieIcfgContainer [2024-06-21 17:24:58,441 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 17:24:58,444 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 17:24:58,444 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 17:24:58,447 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 17:24:58,447 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 05:24:56" (1/4) ... [2024-06-21 17:24:58,448 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61aa2477 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:24:58, skipping insertion in model container [2024-06-21 17:24:58,448 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:24:56" (2/4) ... [2024-06-21 17:24:58,448 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61aa2477 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:24:58, skipping insertion in model container [2024-06-21 17:24:58,448 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:24:57" (3/4) ... [2024-06-21 17:24:58,449 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61aa2477 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:24:58, skipping insertion in model container [2024-06-21 17:24:58,449 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:24:58" (4/4) ... [2024-06-21 17:24:58,450 INFO L112 eAbstractionObserver]: Analyzing ICFG safe009_power.opt.i [2024-06-21 17:24:58,468 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 17:24:58,468 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 17:24:58,468 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 17:24:58,549 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 17:24:58,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 17:24:58,626 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-21 17:24:58,627 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:24:58,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 56 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 17:24:58,630 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 17:24:58,633 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-21 17:24:58,647 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 17:24:58,655 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;@4a8a1c96, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 17:24:58,655 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 17:24:58,661 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 17:24:58,661 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 17:24:58,661 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:24:58,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:24:58,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 17:24:58,663 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:24:58,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:24:58,686 INFO L85 PathProgramCache]: Analyzing trace with hash 777751114, now seen corresponding path program 1 times [2024-06-21 17:24:58,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:24:58,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92465596] [2024-06-21 17:24:58,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:24:58,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:24:58,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:00,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:00,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:00,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92465596] [2024-06-21 17:25:00,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92465596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:00,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:00,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 17:25:00,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897434364] [2024-06-21 17:25:00,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:00,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 17:25:00,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:00,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 17:25:00,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 17:25:00,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 17:25:00,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:00,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:00,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 17:25:00,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:01,623 INFO L124 PetriNetUnfolderBase]: 1205/1833 cut-off events. [2024-06-21 17:25:01,624 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-21 17:25:01,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3738 conditions, 1833 events. 1205/1833 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8350 event pairs, 800 based on Foata normal form. 1/1799 useless extension candidates. Maximal degree in co-relation 3726. Up to 1818 conditions per place. [2024-06-21 17:25:01,641 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 35 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-21 17:25:01,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 44 transitions, 181 flow [2024-06-21 17:25:01,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 17:25:01,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 17:25:01,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2024-06-21 17:25:01,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-21 17:25:01,654 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 66 transitions. [2024-06-21 17:25:01,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 44 transitions, 181 flow [2024-06-21 17:25:01,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 44 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 17:25:01,659 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-21 17:25:01,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-21 17:25:01,664 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-21 17:25:01,664 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-21 17:25:01,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:01,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:01,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:01,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 17:25:01,665 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:01,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:01,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1363565706, now seen corresponding path program 1 times [2024-06-21 17:25:01,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:01,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339538511] [2024-06-21 17:25:01,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:01,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:01,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:04,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:04,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:04,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339538511] [2024-06-21 17:25:04,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339538511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:04,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:04,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 17:25:04,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770369850] [2024-06-21 17:25:04,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:04,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 17:25:04,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:04,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 17:25:04,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 17:25:04,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:25:04,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:04,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:04,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:25:04,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:04,722 INFO L124 PetriNetUnfolderBase]: 1460/2208 cut-off events. [2024-06-21 17:25:04,722 INFO L125 PetriNetUnfolderBase]: For 387/392 co-relation queries the response was YES. [2024-06-21 17:25:04,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5081 conditions, 2208 events. 1460/2208 cut-off events. For 387/392 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9950 event pairs, 758 based on Foata normal form. 7/2213 useless extension candidates. Maximal degree in co-relation 5069. Up to 2154 conditions per place. [2024-06-21 17:25:04,734 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 46 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-06-21 17:25:04,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 57 transitions, 262 flow [2024-06-21 17:25:04,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 17:25:04,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 17:25:04,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 84 transitions. [2024-06-21 17:25:04,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-21 17:25:04,742 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 84 transitions. [2024-06-21 17:25:04,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 57 transitions, 262 flow [2024-06-21 17:25:04,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 57 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 17:25:04,746 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-21 17:25:04,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-21 17:25:04,749 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-21 17:25:04,749 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-21 17:25:04,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:04,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:04,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:04,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 17:25:04,755 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:04,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:04,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1452214186, now seen corresponding path program 1 times [2024-06-21 17:25:04,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:04,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490920991] [2024-06-21 17:25:04,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:04,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:04,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:07,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:07,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:07,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490920991] [2024-06-21 17:25:07,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490920991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:07,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:07,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:25:07,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555406041] [2024-06-21 17:25:07,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:07,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:25:07,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:07,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:25:07,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:25:07,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:25:07,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:07,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:07,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:25:07,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:08,525 INFO L124 PetriNetUnfolderBase]: 1454/2199 cut-off events. [2024-06-21 17:25:08,525 INFO L125 PetriNetUnfolderBase]: For 1111/1121 co-relation queries the response was YES. [2024-06-21 17:25:08,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5609 conditions, 2199 events. 1454/2199 cut-off events. For 1111/1121 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9918 event pairs, 628 based on Foata normal form. 11/2208 useless extension candidates. Maximal degree in co-relation 5595. Up to 2126 conditions per place. [2024-06-21 17:25:08,539 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 55 selfloop transitions, 10 changer transitions 0/69 dead transitions. [2024-06-21 17:25:08,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 69 transitions, 348 flow [2024-06-21 17:25:08,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:25:08,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:25:08,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2024-06-21 17:25:08,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024390243902439 [2024-06-21 17:25:08,544 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 103 transitions. [2024-06-21 17:25:08,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 69 transitions, 348 flow [2024-06-21 17:25:08,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 69 transitions, 334 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 17:25:08,549 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 172 flow [2024-06-21 17:25:08,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-21 17:25:08,550 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2024-06-21 17:25:08,550 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 172 flow [2024-06-21 17:25:08,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:08,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:08,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:08,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 17:25:08,551 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:08,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:08,552 INFO L85 PathProgramCache]: Analyzing trace with hash 2068968499, now seen corresponding path program 1 times [2024-06-21 17:25:08,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:08,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64711580] [2024-06-21 17:25:08,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:08,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:08,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:11,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:11,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:11,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64711580] [2024-06-21 17:25:11,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64711580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:11,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:11,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:25:11,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958154508] [2024-06-21 17:25:11,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:11,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:25:11,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:11,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:25:11,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:25:11,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:25:11,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 172 flow. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:11,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:11,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:25:11,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:12,653 INFO L124 PetriNetUnfolderBase]: 1445/2184 cut-off events. [2024-06-21 17:25:12,653 INFO L125 PetriNetUnfolderBase]: For 2021/2031 co-relation queries the response was YES. [2024-06-21 17:25:12,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6088 conditions, 2184 events. 1445/2184 cut-off events. For 2021/2031 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9769 event pairs, 483 based on Foata normal form. 14/2196 useless extension candidates. Maximal degree in co-relation 6073. Up to 2073 conditions per place. [2024-06-21 17:25:12,666 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 60 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2024-06-21 17:25:12,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 76 transitions, 406 flow [2024-06-21 17:25:12,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:25:12,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:25:12,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-21 17:25:12,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-21 17:25:12,671 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 172 flow. Second operand 6 states and 117 transitions. [2024-06-21 17:25:12,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 76 transitions, 406 flow [2024-06-21 17:25:12,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 76 transitions, 382 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 17:25:12,678 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 191 flow [2024-06-21 17:25:12,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=191, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2024-06-21 17:25:12,679 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-21 17:25:12,680 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 191 flow [2024-06-21 17:25:12,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:12,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:12,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:12,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 17:25:12,681 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:12,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:12,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1765328126, now seen corresponding path program 1 times [2024-06-21 17:25:12,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:12,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997803962] [2024-06-21 17:25:12,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:12,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:12,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:14,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:14,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:14,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997803962] [2024-06-21 17:25:14,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997803962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:14,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:14,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:25:14,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609737486] [2024-06-21 17:25:14,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:14,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:25:14,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:14,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:25:14,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:25:14,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:25:14,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 191 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:14,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:14,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:25:14,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:15,543 INFO L124 PetriNetUnfolderBase]: 1179/1793 cut-off events. [2024-06-21 17:25:15,544 INFO L125 PetriNetUnfolderBase]: For 2640/2640 co-relation queries the response was YES. [2024-06-21 17:25:15,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5413 conditions, 1793 events. 1179/1793 cut-off events. For 2640/2640 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8137 event pairs, 492 based on Foata normal form. 2/1793 useless extension candidates. Maximal degree in co-relation 5396. Up to 1767 conditions per place. [2024-06-21 17:25:15,556 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 47 selfloop transitions, 8 changer transitions 0/59 dead transitions. [2024-06-21 17:25:15,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 59 transitions, 351 flow [2024-06-21 17:25:15,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:25:15,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:25:15,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-06-21 17:25:15,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097560975609756 [2024-06-21 17:25:15,563 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 191 flow. Second operand 5 states and 84 transitions. [2024-06-21 17:25:15,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 59 transitions, 351 flow [2024-06-21 17:25:15,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 318 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 17:25:15,569 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 204 flow [2024-06-21 17:25:15,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=204, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-21 17:25:15,571 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-21 17:25:15,571 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 204 flow [2024-06-21 17:25:15,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:15,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:15,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:15,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 17:25:15,572 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:15,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:15,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1109404969, now seen corresponding path program 1 times [2024-06-21 17:25:15,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:15,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427330329] [2024-06-21 17:25:15,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:15,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:15,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:17,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:17,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:17,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427330329] [2024-06-21 17:25:17,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427330329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:17,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:17,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:25:17,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842687021] [2024-06-21 17:25:17,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:17,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:25:17,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:17,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:25:17,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:25:17,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:25:17,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 204 flow. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:17,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:17,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:25:17,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:18,883 INFO L124 PetriNetUnfolderBase]: 1453/2194 cut-off events. [2024-06-21 17:25:18,884 INFO L125 PetriNetUnfolderBase]: For 4349/4349 co-relation queries the response was YES. [2024-06-21 17:25:18,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6896 conditions, 2194 events. 1453/2194 cut-off events. For 4349/4349 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9817 event pairs, 520 based on Foata normal form. 8/2201 useless extension candidates. Maximal degree in co-relation 6877. Up to 2077 conditions per place. [2024-06-21 17:25:18,898 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 68 selfloop transitions, 15 changer transitions 0/86 dead transitions. [2024-06-21 17:25:18,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 86 transitions, 523 flow [2024-06-21 17:25:18,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:25:18,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:25:18,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-21 17:25:18,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 17:25:18,900 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 204 flow. Second operand 6 states and 105 transitions. [2024-06-21 17:25:18,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 86 transitions, 523 flow [2024-06-21 17:25:18,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 86 transitions, 488 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 17:25:18,907 INFO L231 Difference]: Finished difference. Result has 56 places, 58 transitions, 303 flow [2024-06-21 17:25:18,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=303, PETRI_PLACES=56, PETRI_TRANSITIONS=58} [2024-06-21 17:25:18,910 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 14 predicate places. [2024-06-21 17:25:18,910 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 58 transitions, 303 flow [2024-06-21 17:25:18,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:18,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:18,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:18,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 17:25:18,911 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:18,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:18,911 INFO L85 PathProgramCache]: Analyzing trace with hash 979671684, now seen corresponding path program 1 times [2024-06-21 17:25:18,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:18,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574279543] [2024-06-21 17:25:18,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:18,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:18,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:21,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:21,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:21,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574279543] [2024-06-21 17:25:21,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574279543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:21,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:21,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:25:21,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920532668] [2024-06-21 17:25:21,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:21,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:25:21,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:21,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:25:21,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:25:21,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:25:21,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 58 transitions, 303 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:21,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:21,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:25:21,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:22,835 INFO L124 PetriNetUnfolderBase]: 1466/2217 cut-off events. [2024-06-21 17:25:22,835 INFO L125 PetriNetUnfolderBase]: For 6359/6383 co-relation queries the response was YES. [2024-06-21 17:25:22,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7887 conditions, 2217 events. 1466/2217 cut-off events. For 6359/6383 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9937 event pairs, 548 based on Foata normal form. 17/2230 useless extension candidates. Maximal degree in co-relation 7865. Up to 2109 conditions per place. [2024-06-21 17:25:22,855 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 71 selfloop transitions, 17 changer transitions 0/91 dead transitions. [2024-06-21 17:25:22,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 91 transitions, 621 flow [2024-06-21 17:25:22,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:25:22,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:25:22,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-21 17:25:22,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186991869918699 [2024-06-21 17:25:22,857 INFO L175 Difference]: Start difference. First operand has 56 places, 58 transitions, 303 flow. Second operand 6 states and 103 transitions. [2024-06-21 17:25:22,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 91 transitions, 621 flow [2024-06-21 17:25:22,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 91 transitions, 609 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-21 17:25:22,890 INFO L231 Difference]: Finished difference. Result has 61 places, 64 transitions, 387 flow [2024-06-21 17:25:22,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=387, PETRI_PLACES=61, PETRI_TRANSITIONS=64} [2024-06-21 17:25:22,891 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2024-06-21 17:25:22,891 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 64 transitions, 387 flow [2024-06-21 17:25:22,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:22,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:22,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:22,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 17:25:22,891 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:22,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:22,892 INFO L85 PathProgramCache]: Analyzing trace with hash 931726204, now seen corresponding path program 1 times [2024-06-21 17:25:22,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:22,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516847826] [2024-06-21 17:25:22,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:22,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:22,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:25,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:25,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:25,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516847826] [2024-06-21 17:25:25,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516847826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:25,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:25,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:25:25,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262299477] [2024-06-21 17:25:25,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:25,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:25:25,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:25,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:25:25,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:25:25,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:25:25,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 64 transitions, 387 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:25,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:25,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:25:25,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:26,716 INFO L124 PetriNetUnfolderBase]: 1584/2381 cut-off events. [2024-06-21 17:25:26,716 INFO L125 PetriNetUnfolderBase]: For 8644/8654 co-relation queries the response was YES. [2024-06-21 17:25:26,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9034 conditions, 2381 events. 1584/2381 cut-off events. For 8644/8654 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10726 event pairs, 485 based on Foata normal form. 16/2395 useless extension candidates. Maximal degree in co-relation 9009. Up to 2134 conditions per place. [2024-06-21 17:25:26,753 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 70 selfloop transitions, 32 changer transitions 0/105 dead transitions. [2024-06-21 17:25:26,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 105 transitions, 767 flow [2024-06-21 17:25:26,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:25:26,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:25:26,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 17:25:26,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 17:25:26,754 INFO L175 Difference]: Start difference. First operand has 61 places, 64 transitions, 387 flow. Second operand 8 states and 128 transitions. [2024-06-21 17:25:26,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 105 transitions, 767 flow [2024-06-21 17:25:26,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 105 transitions, 738 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-21 17:25:26,763 INFO L231 Difference]: Finished difference. Result has 69 places, 77 transitions, 558 flow [2024-06-21 17:25:26,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=558, PETRI_PLACES=69, PETRI_TRANSITIONS=77} [2024-06-21 17:25:26,763 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 27 predicate places. [2024-06-21 17:25:26,764 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 77 transitions, 558 flow [2024-06-21 17:25:26,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:26,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:26,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:26,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 17:25:26,764 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:26,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:26,765 INFO L85 PathProgramCache]: Analyzing trace with hash 912323428, now seen corresponding path program 2 times [2024-06-21 17:25:26,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:26,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155609012] [2024-06-21 17:25:26,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:26,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:26,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:28,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:28,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:28,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155609012] [2024-06-21 17:25:28,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155609012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:28,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:28,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:25:28,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213540288] [2024-06-21 17:25:28,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:28,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:25:28,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:28,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:25:28,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:25:29,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:25:29,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 77 transitions, 558 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:29,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:29,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:25:29,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:29,981 INFO L124 PetriNetUnfolderBase]: 1634/2457 cut-off events. [2024-06-21 17:25:29,981 INFO L125 PetriNetUnfolderBase]: For 11937/11946 co-relation queries the response was YES. [2024-06-21 17:25:29,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10547 conditions, 2457 events. 1634/2457 cut-off events. For 11937/11946 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11044 event pairs, 550 based on Foata normal form. 8/2463 useless extension candidates. Maximal degree in co-relation 10518. Up to 2360 conditions per place. [2024-06-21 17:25:29,998 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 97 selfloop transitions, 26 changer transitions 0/126 dead transitions. [2024-06-21 17:25:29,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 126 transitions, 1011 flow [2024-06-21 17:25:29,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:25:29,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:25:30,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 17:25:30,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-21 17:25:30,000 INFO L175 Difference]: Start difference. First operand has 69 places, 77 transitions, 558 flow. Second operand 8 states and 131 transitions. [2024-06-21 17:25:30,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 126 transitions, 1011 flow [2024-06-21 17:25:30,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 126 transitions, 968 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 17:25:30,018 INFO L231 Difference]: Finished difference. Result has 76 places, 93 transitions, 729 flow [2024-06-21 17:25:30,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=729, PETRI_PLACES=76, PETRI_TRANSITIONS=93} [2024-06-21 17:25:30,019 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 34 predicate places. [2024-06-21 17:25:30,019 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 93 transitions, 729 flow [2024-06-21 17:25:30,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:30,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:30,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:30,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 17:25:30,020 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:30,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:30,020 INFO L85 PathProgramCache]: Analyzing trace with hash 979676334, now seen corresponding path program 3 times [2024-06-21 17:25:30,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:30,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500898275] [2024-06-21 17:25:30,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:30,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:30,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:32,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:32,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:32,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500898275] [2024-06-21 17:25:32,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500898275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:32,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:32,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:25:32,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216235221] [2024-06-21 17:25:32,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:32,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:25:32,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:32,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:25:32,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:25:32,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:25:32,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 93 transitions, 729 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:32,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:32,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:25:32,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:33,031 INFO L124 PetriNetUnfolderBase]: 1629/2451 cut-off events. [2024-06-21 17:25:33,031 INFO L125 PetriNetUnfolderBase]: For 13433/13443 co-relation queries the response was YES. [2024-06-21 17:25:33,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10856 conditions, 2451 events. 1629/2451 cut-off events. For 13433/13443 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11031 event pairs, 552 based on Foata normal form. 10/2458 useless extension candidates. Maximal degree in co-relation 10823. Up to 2338 conditions per place. [2024-06-21 17:25:33,045 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 83 selfloop transitions, 27 changer transitions 0/113 dead transitions. [2024-06-21 17:25:33,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 113 transitions, 1009 flow [2024-06-21 17:25:33,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:25:33,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:25:33,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-21 17:25:33,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 17:25:33,047 INFO L175 Difference]: Start difference. First operand has 76 places, 93 transitions, 729 flow. Second operand 6 states and 96 transitions. [2024-06-21 17:25:33,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 113 transitions, 1009 flow [2024-06-21 17:25:33,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 113 transitions, 948 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-21 17:25:33,061 INFO L231 Difference]: Finished difference. Result has 80 places, 93 transitions, 735 flow [2024-06-21 17:25:33,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=668, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=735, PETRI_PLACES=80, PETRI_TRANSITIONS=93} [2024-06-21 17:25:33,062 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 38 predicate places. [2024-06-21 17:25:33,062 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 93 transitions, 735 flow [2024-06-21 17:25:33,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:33,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:33,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:33,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 17:25:33,063 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:33,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:33,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1123191020, now seen corresponding path program 2 times [2024-06-21 17:25:33,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:33,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113316984] [2024-06-21 17:25:33,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:33,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:33,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:35,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:35,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:35,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113316984] [2024-06-21 17:25:35,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113316984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:35,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:35,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:25:35,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620602828] [2024-06-21 17:25:35,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:35,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:25:35,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:35,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:25:35,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:25:35,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:25:35,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 93 transitions, 735 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:35,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:35,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:25:35,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:36,639 INFO L124 PetriNetUnfolderBase]: 1679/2521 cut-off events. [2024-06-21 17:25:36,639 INFO L125 PetriNetUnfolderBase]: For 15624/15631 co-relation queries the response was YES. [2024-06-21 17:25:36,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11276 conditions, 2521 events. 1679/2521 cut-off events. For 15624/15631 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11451 event pairs, 490 based on Foata normal form. 14/2532 useless extension candidates. Maximal degree in co-relation 11241. Up to 2084 conditions per place. [2024-06-21 17:25:36,652 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 91 selfloop transitions, 48 changer transitions 0/142 dead transitions. [2024-06-21 17:25:36,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 142 transitions, 1283 flow [2024-06-21 17:25:36,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:25:36,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:25:36,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 17:25:36,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 17:25:36,654 INFO L175 Difference]: Start difference. First operand has 80 places, 93 transitions, 735 flow. Second operand 7 states and 126 transitions. [2024-06-21 17:25:36,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 142 transitions, 1283 flow [2024-06-21 17:25:36,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 142 transitions, 1196 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 17:25:36,674 INFO L231 Difference]: Finished difference. Result has 84 places, 107 transitions, 934 flow [2024-06-21 17:25:36,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=934, PETRI_PLACES=84, PETRI_TRANSITIONS=107} [2024-06-21 17:25:36,675 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 42 predicate places. [2024-06-21 17:25:36,675 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 107 transitions, 934 flow [2024-06-21 17:25:36,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:36,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:36,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:36,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 17:25:36,676 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:36,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:36,676 INFO L85 PathProgramCache]: Analyzing trace with hash 986351688, now seen corresponding path program 1 times [2024-06-21 17:25:36,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:36,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000058925] [2024-06-21 17:25:36,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:36,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:36,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:39,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:39,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:39,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000058925] [2024-06-21 17:25:39,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000058925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:39,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:39,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:25:39,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938297159] [2024-06-21 17:25:39,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:39,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:25:39,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:39,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:25:39,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:25:39,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:25:39,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 107 transitions, 934 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-21 17:25:39,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:39,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:25:39,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:41,175 INFO L124 PetriNetUnfolderBase]: 1731/2605 cut-off events. [2024-06-21 17:25:41,175 INFO L125 PetriNetUnfolderBase]: For 16333/16333 co-relation queries the response was YES. [2024-06-21 17:25:41,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12131 conditions, 2605 events. 1731/2605 cut-off events. For 16333/16333 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11953 event pairs, 507 based on Foata normal form. 16/2620 useless extension candidates. Maximal degree in co-relation 12093. Up to 2389 conditions per place. [2024-06-21 17:25:41,191 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 124 selfloop transitions, 19 changer transitions 0/146 dead transitions. [2024-06-21 17:25:41,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 146 transitions, 1384 flow [2024-06-21 17:25:41,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:25:41,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:25:41,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 17:25:41,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-21 17:25:41,193 INFO L175 Difference]: Start difference. First operand has 84 places, 107 transitions, 934 flow. Second operand 7 states and 124 transitions. [2024-06-21 17:25:41,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 146 transitions, 1384 flow [2024-06-21 17:25:41,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 146 transitions, 1336 flow, removed 23 selfloop flow, removed 1 redundant places. [2024-06-21 17:25:41,215 INFO L231 Difference]: Finished difference. Result has 90 places, 109 transitions, 962 flow [2024-06-21 17:25:41,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=962, PETRI_PLACES=90, PETRI_TRANSITIONS=109} [2024-06-21 17:25:41,217 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-21 17:25:41,217 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 109 transitions, 962 flow [2024-06-21 17:25:41,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-21 17:25:41,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:41,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:41,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 17:25:41,218 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:41,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:41,219 INFO L85 PathProgramCache]: Analyzing trace with hash 303265346, now seen corresponding path program 1 times [2024-06-21 17:25:41,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:41,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766201125] [2024-06-21 17:25:41,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:41,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:41,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:43,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:43,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:43,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766201125] [2024-06-21 17:25:43,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766201125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:43,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:43,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:25:43,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682252895] [2024-06-21 17:25:43,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:43,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:25:43,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:43,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:25:43,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:25:43,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:25:43,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 109 transitions, 962 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-21 17:25:43,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:43,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:25:43,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:44,738 INFO L124 PetriNetUnfolderBase]: 1762/2653 cut-off events. [2024-06-21 17:25:44,738 INFO L125 PetriNetUnfolderBase]: For 17202/17245 co-relation queries the response was YES. [2024-06-21 17:25:44,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12219 conditions, 2653 events. 1762/2653 cut-off events. For 17202/17245 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12212 event pairs, 582 based on Foata normal form. 29/2675 useless extension candidates. Maximal degree in co-relation 12178. Up to 2461 conditions per place. [2024-06-21 17:25:44,754 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 110 selfloop transitions, 36 changer transitions 0/149 dead transitions. [2024-06-21 17:25:44,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 149 transitions, 1454 flow [2024-06-21 17:25:44,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:25:44,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:25:44,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 17:25:44,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-21 17:25:44,756 INFO L175 Difference]: Start difference. First operand has 90 places, 109 transitions, 962 flow. Second operand 7 states and 122 transitions. [2024-06-21 17:25:44,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 149 transitions, 1454 flow [2024-06-21 17:25:44,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 149 transitions, 1404 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 17:25:44,776 INFO L231 Difference]: Finished difference. Result has 92 places, 115 transitions, 1062 flow [2024-06-21 17:25:44,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=912, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1062, PETRI_PLACES=92, PETRI_TRANSITIONS=115} [2024-06-21 17:25:44,777 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-21 17:25:44,778 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 115 transitions, 1062 flow [2024-06-21 17:25:44,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-21 17:25:44,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:44,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:44,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 17:25:44,778 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:44,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:44,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1675312857, now seen corresponding path program 1 times [2024-06-21 17:25:44,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:44,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417939651] [2024-06-21 17:25:44,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:44,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:44,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:47,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:47,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:47,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417939651] [2024-06-21 17:25:47,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417939651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:47,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:47,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:25:47,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666801967] [2024-06-21 17:25:47,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:47,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:25:47,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:47,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:25:47,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:25:47,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:25:47,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 115 transitions, 1062 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-21 17:25:47,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:47,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:25:47,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:48,468 INFO L124 PetriNetUnfolderBase]: 1964/2937 cut-off events. [2024-06-21 17:25:48,468 INFO L125 PetriNetUnfolderBase]: For 21819/21862 co-relation queries the response was YES. [2024-06-21 17:25:48,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13904 conditions, 2937 events. 1964/2937 cut-off events. For 21819/21862 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 13617 event pairs, 467 based on Foata normal form. 35/2965 useless extension candidates. Maximal degree in co-relation 13862. Up to 2520 conditions per place. [2024-06-21 17:25:48,483 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 139 selfloop transitions, 44 changer transitions 0/186 dead transitions. [2024-06-21 17:25:48,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 186 transitions, 1916 flow [2024-06-21 17:25:48,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:25:48,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:25:48,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 17:25:48,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-21 17:25:48,485 INFO L175 Difference]: Start difference. First operand has 92 places, 115 transitions, 1062 flow. Second operand 8 states and 148 transitions. [2024-06-21 17:25:48,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 186 transitions, 1916 flow [2024-06-21 17:25:48,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 186 transitions, 1851 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-21 17:25:48,516 INFO L231 Difference]: Finished difference. Result has 100 places, 135 transitions, 1327 flow [2024-06-21 17:25:48,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=997, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1327, PETRI_PLACES=100, PETRI_TRANSITIONS=135} [2024-06-21 17:25:48,517 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-21 17:25:48,518 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 135 transitions, 1327 flow [2024-06-21 17:25:48,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-21 17:25:48,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:48,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:48,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 17:25:48,518 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:48,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:48,519 INFO L85 PathProgramCache]: Analyzing trace with hash 2034261134, now seen corresponding path program 2 times [2024-06-21 17:25:48,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:48,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636410759] [2024-06-21 17:25:48,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:48,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:48,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:51,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:51,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:51,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636410759] [2024-06-21 17:25:51,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636410759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:51,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:51,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:25:51,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234993123] [2024-06-21 17:25:51,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:51,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:25:51,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:51,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:25:51,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:25:51,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:25:51,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 135 transitions, 1327 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:51,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:51,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:25:51,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:52,134 INFO L124 PetriNetUnfolderBase]: 1959/2927 cut-off events. [2024-06-21 17:25:52,134 INFO L125 PetriNetUnfolderBase]: For 25745/25756 co-relation queries the response was YES. [2024-06-21 17:25:52,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15488 conditions, 2927 events. 1959/2927 cut-off events. For 25745/25756 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 13423 event pairs, 515 based on Foata normal form. 12/2936 useless extension candidates. Maximal degree in co-relation 15441. Up to 2833 conditions per place. [2024-06-21 17:25:52,150 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 141 selfloop transitions, 18 changer transitions 0/162 dead transitions. [2024-06-21 17:25:52,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 162 transitions, 1759 flow [2024-06-21 17:25:52,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:25:52,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:25:52,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-21 17:25:52,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-21 17:25:52,152 INFO L175 Difference]: Start difference. First operand has 100 places, 135 transitions, 1327 flow. Second operand 6 states and 100 transitions. [2024-06-21 17:25:52,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 162 transitions, 1759 flow [2024-06-21 17:25:52,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 162 transitions, 1686 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-21 17:25:52,186 INFO L231 Difference]: Finished difference. Result has 104 places, 138 transitions, 1348 flow [2024-06-21 17:25:52,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1254, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1348, PETRI_PLACES=104, PETRI_TRANSITIONS=138} [2024-06-21 17:25:52,187 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2024-06-21 17:25:52,187 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 138 transitions, 1348 flow [2024-06-21 17:25:52,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:52,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:52,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:52,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 17:25:52,188 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:52,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:52,188 INFO L85 PathProgramCache]: Analyzing trace with hash 2037985939, now seen corresponding path program 2 times [2024-06-21 17:25:52,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:52,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249870242] [2024-06-21 17:25:52,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:52,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:52,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:54,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:54,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:54,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249870242] [2024-06-21 17:25:54,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249870242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:54,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:54,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:25:54,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294206493] [2024-06-21 17:25:54,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:54,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:25:54,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:54,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:25:54,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:25:54,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:25:54,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 138 transitions, 1348 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-21 17:25:54,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:54,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:25:54,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:56,057 INFO L124 PetriNetUnfolderBase]: 2130/3177 cut-off events. [2024-06-21 17:25:56,058 INFO L125 PetriNetUnfolderBase]: For 31600/31611 co-relation queries the response was YES. [2024-06-21 17:25:56,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17105 conditions, 3177 events. 2130/3177 cut-off events. For 31600/31611 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 14813 event pairs, 488 based on Foata normal form. 18/3192 useless extension candidates. Maximal degree in co-relation 17056. Up to 2814 conditions per place. [2024-06-21 17:25:56,075 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 146 selfloop transitions, 59 changer transitions 0/208 dead transitions. [2024-06-21 17:25:56,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 208 transitions, 2285 flow [2024-06-21 17:25:56,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:25:56,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:25:56,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 175 transitions. [2024-06-21 17:25:56,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38802660753880264 [2024-06-21 17:25:56,078 INFO L175 Difference]: Start difference. First operand has 104 places, 138 transitions, 1348 flow. Second operand 11 states and 175 transitions. [2024-06-21 17:25:56,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 208 transitions, 2285 flow [2024-06-21 17:25:56,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 208 transitions, 2207 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 17:25:56,113 INFO L231 Difference]: Finished difference. Result has 115 places, 164 transitions, 1770 flow [2024-06-21 17:25:56,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1280, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1770, PETRI_PLACES=115, PETRI_TRANSITIONS=164} [2024-06-21 17:25:56,113 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 73 predicate places. [2024-06-21 17:25:56,114 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 164 transitions, 1770 flow [2024-06-21 17:25:56,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-21 17:25:56,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:56,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:56,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 17:25:56,115 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:56,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:56,115 INFO L85 PathProgramCache]: Analyzing trace with hash 2037980204, now seen corresponding path program 3 times [2024-06-21 17:25:56,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:56,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512435582] [2024-06-21 17:25:56,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:56,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:56,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:58,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:58,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:58,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512435582] [2024-06-21 17:25:58,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512435582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:58,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:58,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:25:58,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087472198] [2024-06-21 17:25:58,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:58,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:25:58,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:58,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:25:58,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:25:58,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:25:58,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 164 transitions, 1770 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-21 17:25:58,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:58,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:25:58,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:00,165 INFO L124 PetriNetUnfolderBase]: 2341/3485 cut-off events. [2024-06-21 17:26:00,165 INFO L125 PetriNetUnfolderBase]: For 38229/38240 co-relation queries the response was YES. [2024-06-21 17:26:00,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20736 conditions, 3485 events. 2341/3485 cut-off events. For 38229/38240 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 16464 event pairs, 517 based on Foata normal form. 12/3494 useless extension candidates. Maximal degree in co-relation 20682. Up to 3005 conditions per place. [2024-06-21 17:26:00,187 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 154 selfloop transitions, 63 changer transitions 0/220 dead transitions. [2024-06-21 17:26:00,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 220 transitions, 2610 flow [2024-06-21 17:26:00,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:26:00,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:26:00,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 17:26:00,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-21 17:26:00,188 INFO L175 Difference]: Start difference. First operand has 115 places, 164 transitions, 1770 flow. Second operand 8 states and 137 transitions. [2024-06-21 17:26:00,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 220 transitions, 2610 flow [2024-06-21 17:26:00,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 220 transitions, 2455 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-21 17:26:00,238 INFO L231 Difference]: Finished difference. Result has 120 places, 182 transitions, 2071 flow [2024-06-21 17:26:00,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1651, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2071, PETRI_PLACES=120, PETRI_TRANSITIONS=182} [2024-06-21 17:26:00,239 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 78 predicate places. [2024-06-21 17:26:00,239 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 182 transitions, 2071 flow [2024-06-21 17:26:00,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-21 17:26:00,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:00,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:00,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 17:26:00,240 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:00,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:00,240 INFO L85 PathProgramCache]: Analyzing trace with hash 2037980359, now seen corresponding path program 3 times [2024-06-21 17:26:00,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:00,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860595355] [2024-06-21 17:26:00,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:00,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:00,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:02,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:02,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860595355] [2024-06-21 17:26:02,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860595355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:02,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:02,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:26:02,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684804142] [2024-06-21 17:26:02,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:02,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:26:02,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:02,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:26:02,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:26:02,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:26:02,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 182 transitions, 2071 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-21 17:26:02,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:02,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:26:02,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:03,911 INFO L124 PetriNetUnfolderBase]: 2401/3570 cut-off events. [2024-06-21 17:26:03,911 INFO L125 PetriNetUnfolderBase]: For 45773/45788 co-relation queries the response was YES. [2024-06-21 17:26:03,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23085 conditions, 3570 events. 2401/3570 cut-off events. For 45773/45788 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 16876 event pairs, 551 based on Foata normal form. 22/3589 useless extension candidates. Maximal degree in co-relation 23028. Up to 3138 conditions per place. [2024-06-21 17:26:03,935 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 179 selfloop transitions, 72 changer transitions 0/254 dead transitions. [2024-06-21 17:26:03,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 254 transitions, 3228 flow [2024-06-21 17:26:03,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:26:03,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:26:03,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 17:26:03,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-21 17:26:03,937 INFO L175 Difference]: Start difference. First operand has 120 places, 182 transitions, 2071 flow. Second operand 9 states and 150 transitions. [2024-06-21 17:26:03,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 254 transitions, 3228 flow [2024-06-21 17:26:03,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 254 transitions, 3151 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 17:26:03,988 INFO L231 Difference]: Finished difference. Result has 126 places, 206 transitions, 2563 flow [2024-06-21 17:26:03,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2006, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2563, PETRI_PLACES=126, PETRI_TRANSITIONS=206} [2024-06-21 17:26:03,989 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 84 predicate places. [2024-06-21 17:26:03,989 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 206 transitions, 2563 flow [2024-06-21 17:26:03,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-21 17:26:03,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:03,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:03,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 17:26:03,990 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:03,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:03,990 INFO L85 PathProgramCache]: Analyzing trace with hash -269714221, now seen corresponding path program 4 times [2024-06-21 17:26:03,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:03,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169399952] [2024-06-21 17:26:03,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:03,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:04,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:06,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:06,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:06,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169399952] [2024-06-21 17:26:06,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169399952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:06,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:06,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:26:06,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505959645] [2024-06-21 17:26:06,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:06,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:26:06,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:06,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:26:06,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:26:06,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:26:06,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 206 transitions, 2563 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-21 17:26:06,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:06,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:26:06,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:07,561 INFO L124 PetriNetUnfolderBase]: 2435/3619 cut-off events. [2024-06-21 17:26:07,561 INFO L125 PetriNetUnfolderBase]: For 53669/53684 co-relation queries the response was YES. [2024-06-21 17:26:07,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24800 conditions, 3619 events. 2435/3619 cut-off events. For 53669/53684 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 17282 event pairs, 524 based on Foata normal form. 27/3643 useless extension candidates. Maximal degree in co-relation 24739. Up to 3112 conditions per place. [2024-06-21 17:26:07,589 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 183 selfloop transitions, 73 changer transitions 0/259 dead transitions. [2024-06-21 17:26:07,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 259 transitions, 3530 flow [2024-06-21 17:26:07,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:26:07,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:26:07,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 17:26:07,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-21 17:26:07,591 INFO L175 Difference]: Start difference. First operand has 126 places, 206 transitions, 2563 flow. Second operand 8 states and 143 transitions. [2024-06-21 17:26:07,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 259 transitions, 3530 flow [2024-06-21 17:26:07,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 259 transitions, 3419 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-21 17:26:07,656 INFO L231 Difference]: Finished difference. Result has 131 places, 214 transitions, 2773 flow [2024-06-21 17:26:07,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2458, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2773, PETRI_PLACES=131, PETRI_TRANSITIONS=214} [2024-06-21 17:26:07,657 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 89 predicate places. [2024-06-21 17:26:07,657 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 214 transitions, 2773 flow [2024-06-21 17:26:07,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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) [2024-06-21 17:26:07,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:07,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:07,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 17:26:07,658 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:07,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:07,658 INFO L85 PathProgramCache]: Analyzing trace with hash 116825793, now seen corresponding path program 1 times [2024-06-21 17:26:07,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:07,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688894182] [2024-06-21 17:26:07,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:07,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:07,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:08,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:08,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:08,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688894182] [2024-06-21 17:26:08,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688894182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:08,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:08,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:26:08,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037627957] [2024-06-21 17:26:08,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:08,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:26:08,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:08,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:26:08,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:26:08,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:26:08,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 214 transitions, 2773 flow. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:08,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:08,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:26:08,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:09,696 INFO L124 PetriNetUnfolderBase]: 2429/3611 cut-off events. [2024-06-21 17:26:09,696 INFO L125 PetriNetUnfolderBase]: For 58205/58205 co-relation queries the response was YES. [2024-06-21 17:26:09,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25761 conditions, 3611 events. 2429/3611 cut-off events. For 58205/58205 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 17190 event pairs, 575 based on Foata normal form. 2/3612 useless extension candidates. Maximal degree in co-relation 25698. Up to 3586 conditions per place. [2024-06-21 17:26:09,720 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 212 selfloop transitions, 10 changer transitions 0/225 dead transitions. [2024-06-21 17:26:09,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 225 transitions, 3254 flow [2024-06-21 17:26:09,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:26:09,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:26:09,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 76 transitions. [2024-06-21 17:26:09,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37073170731707317 [2024-06-21 17:26:09,722 INFO L175 Difference]: Start difference. First operand has 131 places, 214 transitions, 2773 flow. Second operand 5 states and 76 transitions. [2024-06-21 17:26:09,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 225 transitions, 3254 flow [2024-06-21 17:26:09,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 225 transitions, 3009 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-21 17:26:09,788 INFO L231 Difference]: Finished difference. Result has 130 places, 214 transitions, 2556 flow [2024-06-21 17:26:09,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2528, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2556, PETRI_PLACES=130, PETRI_TRANSITIONS=214} [2024-06-21 17:26:09,789 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-21 17:26:09,789 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 214 transitions, 2556 flow [2024-06-21 17:26:09,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:09,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:09,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:09,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 17:26:09,790 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:09,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:09,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1457869699, now seen corresponding path program 1 times [2024-06-21 17:26:09,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:09,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954510930] [2024-06-21 17:26:09,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:09,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:09,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:12,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:12,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:12,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954510930] [2024-06-21 17:26:12,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954510930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:12,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:12,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:26:12,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444058007] [2024-06-21 17:26:12,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:12,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:26:12,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:12,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:26:12,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:26:12,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:26:12,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 214 transitions, 2556 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:12,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:12,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:26:12,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:13,677 INFO L124 PetriNetUnfolderBase]: 2477/3690 cut-off events. [2024-06-21 17:26:13,677 INFO L125 PetriNetUnfolderBase]: For 62778/62836 co-relation queries the response was YES. [2024-06-21 17:26:13,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25860 conditions, 3690 events. 2477/3690 cut-off events. For 62778/62836 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 17734 event pairs, 449 based on Foata normal form. 42/3725 useless extension candidates. Maximal degree in co-relation 25796. Up to 3400 conditions per place. [2024-06-21 17:26:13,704 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 215 selfloop transitions, 41 changer transitions 0/259 dead transitions. [2024-06-21 17:26:13,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 259 transitions, 3356 flow [2024-06-21 17:26:13,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:26:13,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:26:13,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 17:26:13,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-21 17:26:13,706 INFO L175 Difference]: Start difference. First operand has 130 places, 214 transitions, 2556 flow. Second operand 8 states and 137 transitions. [2024-06-21 17:26:13,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 259 transitions, 3356 flow [2024-06-21 17:26:13,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 259 transitions, 3334 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 17:26:13,786 INFO L231 Difference]: Finished difference. Result has 135 places, 218 transitions, 2735 flow [2024-06-21 17:26:13,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2534, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2735, PETRI_PLACES=135, PETRI_TRANSITIONS=218} [2024-06-21 17:26:13,787 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-21 17:26:13,787 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 218 transitions, 2735 flow [2024-06-21 17:26:13,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:13,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:13,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:13,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 17:26:13,787 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:13,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:13,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1365208769, now seen corresponding path program 1 times [2024-06-21 17:26:13,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:13,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287442522] [2024-06-21 17:26:13,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:13,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:16,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:16,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:16,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287442522] [2024-06-21 17:26:16,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287442522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:16,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:16,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:26:16,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260759088] [2024-06-21 17:26:16,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:16,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:26:16,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:16,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:26:16,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:26:16,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:26:16,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 218 transitions, 2735 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:16,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:16,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:26:16,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:18,064 INFO L124 PetriNetUnfolderBase]: 2727/4040 cut-off events. [2024-06-21 17:26:18,064 INFO L125 PetriNetUnfolderBase]: For 75854/75912 co-relation queries the response was YES. [2024-06-21 17:26:18,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29190 conditions, 4040 events. 2727/4040 cut-off events. For 75854/75912 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 19678 event pairs, 500 based on Foata normal form. 46/4079 useless extension candidates. Maximal degree in co-relation 29125. Up to 3117 conditions per place. [2024-06-21 17:26:18,091 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 197 selfloop transitions, 103 changer transitions 0/303 dead transitions. [2024-06-21 17:26:18,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 303 transitions, 4222 flow [2024-06-21 17:26:18,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:26:18,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:26:18,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 17:26:18,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742547425474255 [2024-06-21 17:26:18,093 INFO L175 Difference]: Start difference. First operand has 135 places, 218 transitions, 2735 flow. Second operand 9 states and 175 transitions. [2024-06-21 17:26:18,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 303 transitions, 4222 flow [2024-06-21 17:26:18,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 303 transitions, 4106 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-21 17:26:18,196 INFO L231 Difference]: Finished difference. Result has 143 places, 237 transitions, 3241 flow [2024-06-21 17:26:18,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2619, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3241, PETRI_PLACES=143, PETRI_TRANSITIONS=237} [2024-06-21 17:26:18,196 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 101 predicate places. [2024-06-21 17:26:18,196 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 237 transitions, 3241 flow [2024-06-21 17:26:18,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:18,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:18,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:18,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 17:26:18,197 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:18,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:18,197 INFO L85 PathProgramCache]: Analyzing trace with hash -395209237, now seen corresponding path program 2 times [2024-06-21 17:26:18,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:18,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312415489] [2024-06-21 17:26:18,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:18,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:21,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:21,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:21,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312415489] [2024-06-21 17:26:21,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312415489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:21,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:21,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:26:21,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226411905] [2024-06-21 17:26:21,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:21,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:26:21,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:21,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:26:21,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:26:21,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:26:21,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 237 transitions, 3241 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:21,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:21,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:26:21,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:22,599 INFO L124 PetriNetUnfolderBase]: 2747/4072 cut-off events. [2024-06-21 17:26:22,599 INFO L125 PetriNetUnfolderBase]: For 87167/87227 co-relation queries the response was YES. [2024-06-21 17:26:22,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31113 conditions, 4072 events. 2747/4072 cut-off events. For 87167/87227 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 19900 event pairs, 578 based on Foata normal form. 44/4109 useless extension candidates. Maximal degree in co-relation 31043. Up to 3860 conditions per place. [2024-06-21 17:26:22,637 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 236 selfloop transitions, 38 changer transitions 0/277 dead transitions. [2024-06-21 17:26:22,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 277 transitions, 3933 flow [2024-06-21 17:26:22,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:26:22,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:26:22,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 17:26:22,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-21 17:26:22,639 INFO L175 Difference]: Start difference. First operand has 143 places, 237 transitions, 3241 flow. Second operand 8 states and 134 transitions. [2024-06-21 17:26:22,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 277 transitions, 3933 flow [2024-06-21 17:26:22,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 277 transitions, 3767 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-06-21 17:26:22,772 INFO L231 Difference]: Finished difference. Result has 148 places, 239 transitions, 3198 flow [2024-06-21 17:26:22,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3075, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3198, PETRI_PLACES=148, PETRI_TRANSITIONS=239} [2024-06-21 17:26:22,773 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-21 17:26:22,774 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 239 transitions, 3198 flow [2024-06-21 17:26:22,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:22,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:22,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:22,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 17:26:22,774 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:22,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:22,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1362412383, now seen corresponding path program 3 times [2024-06-21 17:26:22,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:22,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945070305] [2024-06-21 17:26:22,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:22,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:22,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:25,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:25,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:25,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945070305] [2024-06-21 17:26:25,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945070305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:25,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:25,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:26:25,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051754846] [2024-06-21 17:26:25,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:25,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:26:25,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:25,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:26:25,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:26:25,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:26:25,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 239 transitions, 3198 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:25,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:25,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:26:25,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:27,054 INFO L124 PetriNetUnfolderBase]: 2739/4057 cut-off events. [2024-06-21 17:26:27,054 INFO L125 PetriNetUnfolderBase]: For 88653/88670 co-relation queries the response was YES. [2024-06-21 17:26:27,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30975 conditions, 4057 events. 2739/4057 cut-off events. For 88653/88670 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 19699 event pairs, 560 based on Foata normal form. 20/4074 useless extension candidates. Maximal degree in co-relation 30903. Up to 3941 conditions per place. [2024-06-21 17:26:27,085 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 252 selfloop transitions, 21 changer transitions 0/276 dead transitions. [2024-06-21 17:26:27,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 276 transitions, 3908 flow [2024-06-21 17:26:27,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:26:27,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:26:27,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 17:26:27,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-21 17:26:27,087 INFO L175 Difference]: Start difference. First operand has 148 places, 239 transitions, 3198 flow. Second operand 8 states and 127 transitions. [2024-06-21 17:26:27,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 276 transitions, 3908 flow [2024-06-21 17:26:27,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 276 transitions, 3807 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 17:26:27,186 INFO L231 Difference]: Finished difference. Result has 150 places, 241 transitions, 3212 flow [2024-06-21 17:26:27,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3097, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3212, PETRI_PLACES=150, PETRI_TRANSITIONS=241} [2024-06-21 17:26:27,187 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 108 predicate places. [2024-06-21 17:26:27,187 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 241 transitions, 3212 flow [2024-06-21 17:26:27,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:27,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:27,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:27,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 17:26:27,188 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:27,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:27,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1362412259, now seen corresponding path program 2 times [2024-06-21 17:26:27,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:27,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243952498] [2024-06-21 17:26:27,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:27,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:27,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:30,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:30,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:30,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243952498] [2024-06-21 17:26:30,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243952498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:30,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:30,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:26:30,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790772517] [2024-06-21 17:26:30,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:30,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:26:30,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:30,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:26:30,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:26:30,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:26:30,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 241 transitions, 3212 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:30,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:30,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:26:30,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:31,964 INFO L124 PetriNetUnfolderBase]: 2877/4256 cut-off events. [2024-06-21 17:26:31,965 INFO L125 PetriNetUnfolderBase]: For 100601/100661 co-relation queries the response was YES. [2024-06-21 17:26:31,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32867 conditions, 4256 events. 2877/4256 cut-off events. For 100601/100661 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 20904 event pairs, 516 based on Foata normal form. 48/4297 useless extension candidates. Maximal degree in co-relation 32794. Up to 3602 conditions per place. [2024-06-21 17:26:32,083 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 231 selfloop transitions, 72 changer transitions 0/306 dead transitions. [2024-06-21 17:26:32,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 306 transitions, 4469 flow [2024-06-21 17:26:32,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:26:32,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:26:32,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 17:26:32,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-21 17:26:32,085 INFO L175 Difference]: Start difference. First operand has 150 places, 241 transitions, 3212 flow. Second operand 9 states and 167 transitions. [2024-06-21 17:26:32,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 306 transitions, 4469 flow [2024-06-21 17:26:32,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 306 transitions, 4364 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 17:26:32,207 INFO L231 Difference]: Finished difference. Result has 154 places, 249 transitions, 3439 flow [2024-06-21 17:26:32,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3107, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3439, PETRI_PLACES=154, PETRI_TRANSITIONS=249} [2024-06-21 17:26:32,207 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-21 17:26:32,207 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 249 transitions, 3439 flow [2024-06-21 17:26:32,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:32,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:32,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:32,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 17:26:32,208 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:32,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:32,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1362407609, now seen corresponding path program 3 times [2024-06-21 17:26:32,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:32,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031007871] [2024-06-21 17:26:32,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:32,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:32,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:35,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:35,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:35,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031007871] [2024-06-21 17:26:35,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031007871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:35,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:35,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:26:35,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903539568] [2024-06-21 17:26:35,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:35,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:26:35,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:35,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:26:35,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:26:35,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:26:35,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 249 transitions, 3439 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:35,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:35,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:26:35,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:37,034 INFO L124 PetriNetUnfolderBase]: 2895/4279 cut-off events. [2024-06-21 17:26:37,034 INFO L125 PetriNetUnfolderBase]: For 109040/109057 co-relation queries the response was YES. [2024-06-21 17:26:37,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34025 conditions, 4279 events. 2895/4279 cut-off events. For 109040/109057 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 20992 event pairs, 540 based on Foata normal form. 24/4300 useless extension candidates. Maximal degree in co-relation 33950. Up to 4028 conditions per place. [2024-06-21 17:26:37,076 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 260 selfloop transitions, 36 changer transitions 0/299 dead transitions. [2024-06-21 17:26:37,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 299 transitions, 4455 flow [2024-06-21 17:26:37,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:26:37,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:26:37,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 17:26:37,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 17:26:37,078 INFO L175 Difference]: Start difference. First operand has 154 places, 249 transitions, 3439 flow. Second operand 9 states and 153 transitions. [2024-06-21 17:26:37,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 299 transitions, 4455 flow [2024-06-21 17:26:37,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 299 transitions, 4250 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-21 17:26:37,246 INFO L231 Difference]: Finished difference. Result has 158 places, 253 transitions, 3420 flow [2024-06-21 17:26:37,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3256, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3420, PETRI_PLACES=158, PETRI_TRANSITIONS=253} [2024-06-21 17:26:37,246 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-21 17:26:37,246 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 253 transitions, 3420 flow [2024-06-21 17:26:37,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:37,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:37,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:37,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 17:26:37,247 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:37,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:37,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1246936763, now seen corresponding path program 1 times [2024-06-21 17:26:37,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:37,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855461922] [2024-06-21 17:26:37,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:37,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:37,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:40,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:40,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:40,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855461922] [2024-06-21 17:26:40,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855461922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:40,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:40,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:26:40,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795819321] [2024-06-21 17:26:40,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:40,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:26:40,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:40,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:26:40,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:26:40,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:26:40,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 253 transitions, 3420 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:40,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:40,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:26:40,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:41,822 INFO L124 PetriNetUnfolderBase]: 2925/4322 cut-off events. [2024-06-21 17:26:41,823 INFO L125 PetriNetUnfolderBase]: For 112611/112628 co-relation queries the response was YES. [2024-06-21 17:26:41,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34403 conditions, 4322 events. 2925/4322 cut-off events. For 112611/112628 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 21188 event pairs, 559 based on Foata normal form. 23/4342 useless extension candidates. Maximal degree in co-relation 34326. Up to 3968 conditions per place. [2024-06-21 17:26:41,858 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 217 selfloop transitions, 81 changer transitions 0/301 dead transitions. [2024-06-21 17:26:41,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 301 transitions, 4473 flow [2024-06-21 17:26:41,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:26:41,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:26:41,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 17:26:41,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39295392953929537 [2024-06-21 17:26:41,860 INFO L175 Difference]: Start difference. First operand has 158 places, 253 transitions, 3420 flow. Second operand 9 states and 145 transitions. [2024-06-21 17:26:41,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 301 transitions, 4473 flow [2024-06-21 17:26:42,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 301 transitions, 4313 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-21 17:26:42,007 INFO L231 Difference]: Finished difference. Result has 160 places, 265 transitions, 3688 flow [2024-06-21 17:26:42,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3266, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3688, PETRI_PLACES=160, PETRI_TRANSITIONS=265} [2024-06-21 17:26:42,007 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 118 predicate places. [2024-06-21 17:26:42,008 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 265 transitions, 3688 flow [2024-06-21 17:26:42,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:42,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:42,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:42,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 17:26:42,008 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:42,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:42,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1246936515, now seen corresponding path program 1 times [2024-06-21 17:26:42,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:42,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271499030] [2024-06-21 17:26:42,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:42,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:44,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:44,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:44,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271499030] [2024-06-21 17:26:44,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271499030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:44,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:44,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:26:44,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319374608] [2024-06-21 17:26:44,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:44,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:26:44,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:44,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:26:44,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:26:44,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:26:44,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 265 transitions, 3688 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:44,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:44,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:26:44,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:46,655 INFO L124 PetriNetUnfolderBase]: 3005/4450 cut-off events. [2024-06-21 17:26:46,656 INFO L125 PetriNetUnfolderBase]: For 123636/123653 co-relation queries the response was YES. [2024-06-21 17:26:46,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35259 conditions, 4450 events. 3005/4450 cut-off events. For 123636/123653 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 21999 event pairs, 516 based on Foata normal form. 32/4479 useless extension candidates. Maximal degree in co-relation 35182. Up to 3980 conditions per place. [2024-06-21 17:26:46,696 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 235 selfloop transitions, 67 changer transitions 0/305 dead transitions. [2024-06-21 17:26:46,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 305 transitions, 4617 flow [2024-06-21 17:26:46,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:26:46,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:26:46,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-21 17:26:46,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-21 17:26:46,697 INFO L175 Difference]: Start difference. First operand has 160 places, 265 transitions, 3688 flow. Second operand 9 states and 148 transitions. [2024-06-21 17:26:46,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 305 transitions, 4617 flow [2024-06-21 17:26:46,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 305 transitions, 4414 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-21 17:26:46,876 INFO L231 Difference]: Finished difference. Result has 162 places, 267 transitions, 3692 flow [2024-06-21 17:26:46,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3485, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3692, PETRI_PLACES=162, PETRI_TRANSITIONS=267} [2024-06-21 17:26:46,876 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-21 17:26:46,876 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 267 transitions, 3692 flow [2024-06-21 17:26:46,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:46,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:46,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:46,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 17:26:46,877 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:46,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:46,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1247116439, now seen corresponding path program 4 times [2024-06-21 17:26:46,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:46,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974286571] [2024-06-21 17:26:46,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:46,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:46,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:49,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:49,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:49,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974286571] [2024-06-21 17:26:49,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974286571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:49,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:49,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:26:49,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890074024] [2024-06-21 17:26:49,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:49,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:26:49,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:49,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:26:49,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:26:49,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:26:49,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 267 transitions, 3692 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:49,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:49,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:26:49,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:51,639 INFO L124 PetriNetUnfolderBase]: 3273/4836 cut-off events. [2024-06-21 17:26:51,639 INFO L125 PetriNetUnfolderBase]: For 141111/141128 co-relation queries the response was YES. [2024-06-21 17:26:51,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39303 conditions, 4836 events. 3273/4836 cut-off events. For 141111/141128 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 24178 event pairs, 568 based on Foata normal form. 24/4857 useless extension candidates. Maximal degree in co-relation 39225. Up to 3975 conditions per place. [2024-06-21 17:26:51,678 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 249 selfloop transitions, 119 changer transitions 0/371 dead transitions. [2024-06-21 17:26:51,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 371 transitions, 5735 flow [2024-06-21 17:26:51,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:26:51,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:26:51,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-21 17:26:51,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212860310421286 [2024-06-21 17:26:51,680 INFO L175 Difference]: Start difference. First operand has 162 places, 267 transitions, 3692 flow. Second operand 11 states and 190 transitions. [2024-06-21 17:26:51,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 371 transitions, 5735 flow [2024-06-21 17:26:51,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 371 transitions, 5547 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 17:26:51,849 INFO L231 Difference]: Finished difference. Result has 168 places, 304 transitions, 4568 flow [2024-06-21 17:26:51,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3528, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4568, PETRI_PLACES=168, PETRI_TRANSITIONS=304} [2024-06-21 17:26:51,851 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-21 17:26:51,851 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 304 transitions, 4568 flow [2024-06-21 17:26:51,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:51,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:51,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:51,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 17:26:51,852 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:51,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:51,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1246943459, now seen corresponding path program 5 times [2024-06-21 17:26:51,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:51,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129222644] [2024-06-21 17:26:51,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:51,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:51,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:54,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:54,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:54,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129222644] [2024-06-21 17:26:54,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129222644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:54,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:54,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:26:54,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592371907] [2024-06-21 17:26:54,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:54,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:26:54,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:54,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:26:54,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:26:54,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:26:54,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 304 transitions, 4568 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:54,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:54,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:26:54,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:56,586 INFO L124 PetriNetUnfolderBase]: 3457/5105 cut-off events. [2024-06-21 17:26:56,587 INFO L125 PetriNetUnfolderBase]: For 166445/166462 co-relation queries the response was YES. [2024-06-21 17:26:56,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43836 conditions, 5105 events. 3457/5105 cut-off events. For 166445/166462 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 25812 event pairs, 573 based on Foata normal form. 24/5126 useless extension candidates. Maximal degree in co-relation 43755. Up to 4341 conditions per place. [2024-06-21 17:26:56,632 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 249 selfloop transitions, 135 changer transitions 0/387 dead transitions. [2024-06-21 17:26:56,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 387 transitions, 6360 flow [2024-06-21 17:26:56,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:26:56,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:26:56,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 198 transitions. [2024-06-21 17:26:56,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-21 17:26:56,634 INFO L175 Difference]: Start difference. First operand has 168 places, 304 transitions, 4568 flow. Second operand 12 states and 198 transitions. [2024-06-21 17:26:56,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 387 transitions, 6360 flow [2024-06-21 17:26:56,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 387 transitions, 6199 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-21 17:26:56,830 INFO L231 Difference]: Finished difference. Result has 177 places, 331 transitions, 5378 flow [2024-06-21 17:26:56,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4433, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5378, PETRI_PLACES=177, PETRI_TRANSITIONS=331} [2024-06-21 17:26:56,831 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-21 17:26:56,831 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 331 transitions, 5378 flow [2024-06-21 17:26:56,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:56,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:56,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:56,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 17:26:56,831 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:56,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:56,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1247121213, now seen corresponding path program 4 times [2024-06-21 17:26:56,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:56,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792246036] [2024-06-21 17:26:56,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:56,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:56,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:59,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:59,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:59,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792246036] [2024-06-21 17:26:59,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792246036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:59,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:59,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:26:59,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118232626] [2024-06-21 17:26:59,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:59,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:26:59,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:59,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:26:59,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:26:59,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:26:59,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 331 transitions, 5378 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:59,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:59,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:26:59,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:27:01,229 INFO L124 PetriNetUnfolderBase]: 3449/5093 cut-off events. [2024-06-21 17:27:01,230 INFO L125 PetriNetUnfolderBase]: For 176331/176348 co-relation queries the response was YES. [2024-06-21 17:27:01,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45469 conditions, 5093 events. 3449/5093 cut-off events. For 176331/176348 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 25737 event pairs, 671 based on Foata normal form. 20/5110 useless extension candidates. Maximal degree in co-relation 45384. Up to 4941 conditions per place. [2024-06-21 17:27:01,284 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 327 selfloop transitions, 32 changer transitions 0/362 dead transitions. [2024-06-21 17:27:01,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 362 transitions, 6186 flow [2024-06-21 17:27:01,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:27:01,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:27:01,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-21 17:27:01,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-21 17:27:01,286 INFO L175 Difference]: Start difference. First operand has 177 places, 331 transitions, 5378 flow. Second operand 8 states and 124 transitions. [2024-06-21 17:27:01,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 362 transitions, 6186 flow [2024-06-21 17:27:01,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 362 transitions, 6021 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-21 17:27:01,642 INFO L231 Difference]: Finished difference. Result has 179 places, 331 transitions, 5284 flow [2024-06-21 17:27:01,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5213, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5284, PETRI_PLACES=179, PETRI_TRANSITIONS=331} [2024-06-21 17:27:01,642 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 137 predicate places. [2024-06-21 17:27:01,642 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 331 transitions, 5284 flow [2024-06-21 17:27:01,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:01,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:27:01,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:27:01,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 17:27:01,644 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:27:01,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:27:01,644 INFO L85 PathProgramCache]: Analyzing trace with hash -390625143, now seen corresponding path program 6 times [2024-06-21 17:27:01,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:27:01,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956844041] [2024-06-21 17:27:01,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:27:01,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:27:01,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:27:04,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:27:04,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:27:04,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956844041] [2024-06-21 17:27:04,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956844041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:27:04,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:27:04,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:27:04,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735040792] [2024-06-21 17:27:04,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:27:04,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:27:04,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:27:04,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:27:04,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:27:04,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:27:04,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 331 transitions, 5284 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:04,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:27:04,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:27:04,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:27:06,086 INFO L124 PetriNetUnfolderBase]: 3512/5182 cut-off events. [2024-06-21 17:27:06,086 INFO L125 PetriNetUnfolderBase]: For 185519/185536 co-relation queries the response was YES. [2024-06-21 17:27:06,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46277 conditions, 5182 events. 3512/5182 cut-off events. For 185519/185536 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 26225 event pairs, 611 based on Foata normal form. 24/5203 useless extension candidates. Maximal degree in co-relation 46191. Up to 4310 conditions per place. [2024-06-21 17:27:06,132 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 267 selfloop transitions, 141 changer transitions 0/411 dead transitions. [2024-06-21 17:27:06,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 411 transitions, 7083 flow [2024-06-21 17:27:06,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:27:06,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:27:06,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-21 17:27:06,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 17:27:06,133 INFO L175 Difference]: Start difference. First operand has 179 places, 331 transitions, 5284 flow. Second operand 11 states and 187 transitions. [2024-06-21 17:27:06,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 411 transitions, 7083 flow [2024-06-21 17:27:06,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 411 transitions, 7007 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 17:27:06,383 INFO L231 Difference]: Finished difference. Result has 186 places, 354 transitions, 6127 flow [2024-06-21 17:27:06,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5208, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6127, PETRI_PLACES=186, PETRI_TRANSITIONS=354} [2024-06-21 17:27:06,384 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-21 17:27:06,384 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 354 transitions, 6127 flow [2024-06-21 17:27:06,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:06,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:27:06,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:27:06,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 17:27:06,384 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:27:06,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:27:06,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1312321113, now seen corresponding path program 7 times [2024-06-21 17:27:06,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:27:06,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162288871] [2024-06-21 17:27:06,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:27:06,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:27:06,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:27:09,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:27:09,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:27:09,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162288871] [2024-06-21 17:27:09,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162288871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:27:09,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:27:09,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:27:09,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518814835] [2024-06-21 17:27:09,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:27:09,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:27:09,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:27:09,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:27:09,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:27:09,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:27:09,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 354 transitions, 6127 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:09,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:27:09,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:27:09,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:27:11,157 INFO L124 PetriNetUnfolderBase]: 3589/5291 cut-off events. [2024-06-21 17:27:11,158 INFO L125 PetriNetUnfolderBase]: For 201701/201718 co-relation queries the response was YES. [2024-06-21 17:27:11,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48711 conditions, 5291 events. 3589/5291 cut-off events. For 201701/201718 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 26884 event pairs, 561 based on Foata normal form. 24/5312 useless extension candidates. Maximal degree in co-relation 48621. Up to 4731 conditions per place. [2024-06-21 17:27:11,209 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 342 selfloop transitions, 98 changer transitions 0/443 dead transitions. [2024-06-21 17:27:11,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 443 transitions, 8001 flow [2024-06-21 17:27:11,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:27:11,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:27:11,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 194 transitions. [2024-06-21 17:27:11,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2024-06-21 17:27:11,211 INFO L175 Difference]: Start difference. First operand has 186 places, 354 transitions, 6127 flow. Second operand 12 states and 194 transitions. [2024-06-21 17:27:11,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 443 transitions, 8001 flow [2024-06-21 17:27:11,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 443 transitions, 7862 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-21 17:27:11,542 INFO L231 Difference]: Finished difference. Result has 198 places, 389 transitions, 6733 flow [2024-06-21 17:27:11,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5988, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6733, PETRI_PLACES=198, PETRI_TRANSITIONS=389} [2024-06-21 17:27:11,543 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 156 predicate places. [2024-06-21 17:27:11,543 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 389 transitions, 6733 flow [2024-06-21 17:27:11,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:11,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:27:11,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:27:11,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 17:27:11,544 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:27:11,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:27:11,544 INFO L85 PathProgramCache]: Analyzing trace with hash 228802557, now seen corresponding path program 2 times [2024-06-21 17:27:11,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:27:11,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66816509] [2024-06-21 17:27:11,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:27:11,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:27:11,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:27:14,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:27:14,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:27:14,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66816509] [2024-06-21 17:27:14,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66816509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:27:14,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:27:14,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:27:14,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116995628] [2024-06-21 17:27:14,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:27:14,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:27:14,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:27:14,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:27:14,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:27:14,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:27:14,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 389 transitions, 6733 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:14,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:27:14,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:27:14,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:27:16,365 INFO L124 PetriNetUnfolderBase]: 3669/5419 cut-off events. [2024-06-21 17:27:16,365 INFO L125 PetriNetUnfolderBase]: For 219121/219140 co-relation queries the response was YES. [2024-06-21 17:27:16,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50973 conditions, 5419 events. 3669/5419 cut-off events. For 219121/219140 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 27644 event pairs, 588 based on Foata normal form. 34/5450 useless extension candidates. Maximal degree in co-relation 50876. Up to 4828 conditions per place. [2024-06-21 17:27:16,418 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 324 selfloop transitions, 107 changer transitions 0/434 dead transitions. [2024-06-21 17:27:16,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 434 transitions, 8082 flow [2024-06-21 17:27:16,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:27:16,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:27:16,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 17:27:16,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-21 17:27:16,420 INFO L175 Difference]: Start difference. First operand has 198 places, 389 transitions, 6733 flow. Second operand 8 states and 145 transitions. [2024-06-21 17:27:16,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 434 transitions, 8082 flow [2024-06-21 17:27:16,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 434 transitions, 7962 flow, removed 59 selfloop flow, removed 1 redundant places. [2024-06-21 17:27:16,754 INFO L231 Difference]: Finished difference. Result has 205 places, 391 transitions, 6909 flow [2024-06-21 17:27:16,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6613, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6909, PETRI_PLACES=205, PETRI_TRANSITIONS=391} [2024-06-21 17:27:16,755 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-21 17:27:16,755 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 391 transitions, 6909 flow [2024-06-21 17:27:16,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:16,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:27:16,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:27:16,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 17:27:16,756 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:27:16,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:27:16,757 INFO L85 PathProgramCache]: Analyzing trace with hash 568513271, now seen corresponding path program 3 times [2024-06-21 17:27:16,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:27:16,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689441861] [2024-06-21 17:27:16,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:27:16,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:27:16,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:27:20,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:27:20,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:27:20,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689441861] [2024-06-21 17:27:20,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689441861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:27:20,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:27:20,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:27:20,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479948604] [2024-06-21 17:27:20,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:27:20,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:27:20,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:27:20,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:27:20,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:27:20,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:27:20,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 391 transitions, 6909 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:20,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:27:20,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:27:20,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:27:22,485 INFO L124 PetriNetUnfolderBase]: 3793/5611 cut-off events. [2024-06-21 17:27:22,485 INFO L125 PetriNetUnfolderBase]: For 236388/236407 co-relation queries the response was YES. [2024-06-21 17:27:22,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53005 conditions, 5611 events. 3793/5611 cut-off events. For 236388/236407 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 28953 event pairs, 545 based on Foata normal form. 34/5642 useless extension candidates. Maximal degree in co-relation 52905. Up to 4585 conditions per place. [2024-06-21 17:27:22,545 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 331 selfloop transitions, 109 changer transitions 0/443 dead transitions. [2024-06-21 17:27:22,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 443 transitions, 8431 flow [2024-06-21 17:27:22,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:27:22,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:27:22,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 17:27:22,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-21 17:27:22,547 INFO L175 Difference]: Start difference. First operand has 205 places, 391 transitions, 6909 flow. Second operand 8 states and 149 transitions. [2024-06-21 17:27:22,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 443 transitions, 8431 flow [2024-06-21 17:27:23,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 443 transitions, 8172 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 17:27:23,039 INFO L231 Difference]: Finished difference. Result has 207 places, 394 transitions, 6965 flow [2024-06-21 17:27:23,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6650, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6965, PETRI_PLACES=207, PETRI_TRANSITIONS=394} [2024-06-21 17:27:23,040 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-21 17:27:23,040 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 394 transitions, 6965 flow [2024-06-21 17:27:23,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:23,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:27:23,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:27:23,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 17:27:23,041 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:27:23,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:27:23,041 INFO L85 PathProgramCache]: Analyzing trace with hash 626325354, now seen corresponding path program 1 times [2024-06-21 17:27:23,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:27:23,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045971854] [2024-06-21 17:27:23,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:27:23,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:27:23,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:27:25,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:27:25,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:27:25,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045971854] [2024-06-21 17:27:25,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045971854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:27:25,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:27:25,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:27:25,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189557074] [2024-06-21 17:27:25,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:27:25,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:27:25,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:27:25,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:27:25,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:27:25,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:27:25,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 394 transitions, 6965 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:25,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:27:25,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:27:25,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:27:28,535 INFO L124 PetriNetUnfolderBase]: 4720/7107 cut-off events. [2024-06-21 17:27:28,536 INFO L125 PetriNetUnfolderBase]: For 354508/354564 co-relation queries the response was YES. [2024-06-21 17:27:28,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67070 conditions, 7107 events. 4720/7107 cut-off events. For 354508/354564 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 39421 event pairs, 910 based on Foata normal form. 94/7194 useless extension candidates. Maximal degree in co-relation 66969. Up to 4040 conditions per place. [2024-06-21 17:27:28,614 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 308 selfloop transitions, 177 changer transitions 0/488 dead transitions. [2024-06-21 17:27:28,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 488 transitions, 9126 flow [2024-06-21 17:27:28,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:27:28,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:27:28,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-21 17:27:28,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951219512195122 [2024-06-21 17:27:28,616 INFO L175 Difference]: Start difference. First operand has 207 places, 394 transitions, 6965 flow. Second operand 10 states and 203 transitions. [2024-06-21 17:27:28,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 488 transitions, 9126 flow [2024-06-21 17:27:29,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 488 transitions, 8942 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-21 17:27:29,258 INFO L231 Difference]: Finished difference. Result has 215 places, 397 transitions, 7285 flow [2024-06-21 17:27:29,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6781, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7285, PETRI_PLACES=215, PETRI_TRANSITIONS=397} [2024-06-21 17:27:29,259 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-21 17:27:29,259 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 397 transitions, 7285 flow [2024-06-21 17:27:29,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:29,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:27:29,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:27:29,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 17:27:29,260 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:27:29,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:27:29,260 INFO L85 PathProgramCache]: Analyzing trace with hash 628203024, now seen corresponding path program 2 times [2024-06-21 17:27:29,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:27:29,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232065355] [2024-06-21 17:27:29,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:27:29,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:27:29,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:27:32,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:27:32,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:27:32,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232065355] [2024-06-21 17:27:32,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232065355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:27:32,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:27:32,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:27:32,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265763772] [2024-06-21 17:27:32,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:27:32,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:27:32,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:27:32,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:27:32,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:27:32,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:27:32,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 397 transitions, 7285 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:32,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:27:32,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:27:32,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:27:34,983 INFO L124 PetriNetUnfolderBase]: 4996/7575 cut-off events. [2024-06-21 17:27:34,983 INFO L125 PetriNetUnfolderBase]: For 398540/398596 co-relation queries the response was YES. [2024-06-21 17:27:35,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71662 conditions, 7575 events. 4996/7575 cut-off events. For 398540/398596 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 42979 event pairs, 1297 based on Foata normal form. 102/7670 useless extension candidates. Maximal degree in co-relation 71557. Up to 5937 conditions per place. [2024-06-21 17:27:35,062 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 292 selfloop transitions, 178 changer transitions 0/473 dead transitions. [2024-06-21 17:27:35,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 473 transitions, 9026 flow [2024-06-21 17:27:35,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:27:35,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:27:35,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 17:27:35,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47073170731707314 [2024-06-21 17:27:35,063 INFO L175 Difference]: Start difference. First operand has 215 places, 397 transitions, 7285 flow. Second operand 10 states and 193 transitions. [2024-06-21 17:27:35,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 473 transitions, 9026 flow [2024-06-21 17:27:35,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 473 transitions, 8739 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 17:27:35,571 INFO L231 Difference]: Finished difference. Result has 220 places, 398 transitions, 7424 flow [2024-06-21 17:27:35,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6998, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7424, PETRI_PLACES=220, PETRI_TRANSITIONS=398} [2024-06-21 17:27:35,571 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 178 predicate places. [2024-06-21 17:27:35,571 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 398 transitions, 7424 flow [2024-06-21 17:27:35,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:35,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:27:35,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:27:35,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 17:27:35,572 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:27:35,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:27:35,573 INFO L85 PathProgramCache]: Analyzing trace with hash 628199304, now seen corresponding path program 3 times [2024-06-21 17:27:35,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:27:35,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394946794] [2024-06-21 17:27:35,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:27:35,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:27:35,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:27:39,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:27:39,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:27:39,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394946794] [2024-06-21 17:27:39,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394946794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:27:39,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:27:39,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:27:39,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623292475] [2024-06-21 17:27:39,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:27:39,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:27:39,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:27:39,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:27:39,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:27:39,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:27:39,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 398 transitions, 7424 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:39,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:27:39,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:27:39,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:27:42,489 INFO L124 PetriNetUnfolderBase]: 5935/9079 cut-off events. [2024-06-21 17:27:42,489 INFO L125 PetriNetUnfolderBase]: For 474206/474262 co-relation queries the response was YES. [2024-06-21 17:27:42,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84869 conditions, 9079 events. 5935/9079 cut-off events. For 474206/474262 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 53967 event pairs, 1529 based on Foata normal form. 102/9174 useless extension candidates. Maximal degree in co-relation 84763. Up to 6401 conditions per place. [2024-06-21 17:27:42,579 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 394 selfloop transitions, 109 changer transitions 0/506 dead transitions. [2024-06-21 17:27:42,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 506 transitions, 9906 flow [2024-06-21 17:27:42,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:27:42,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:27:42,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-21 17:27:42,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-21 17:27:42,581 INFO L175 Difference]: Start difference. First operand has 220 places, 398 transitions, 7424 flow. Second operand 10 states and 200 transitions. [2024-06-21 17:27:42,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 506 transitions, 9906 flow [2024-06-21 17:27:43,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 506 transitions, 9469 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-21 17:27:43,317 INFO L231 Difference]: Finished difference. Result has 225 places, 422 transitions, 7824 flow [2024-06-21 17:27:43,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7026, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7824, PETRI_PLACES=225, PETRI_TRANSITIONS=422} [2024-06-21 17:27:43,317 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-21 17:27:43,317 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 422 transitions, 7824 flow [2024-06-21 17:27:43,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:43,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:27:43,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:27:43,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 17:27:43,318 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:27:43,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:27:43,318 INFO L85 PathProgramCache]: Analyzing trace with hash 714891114, now seen corresponding path program 4 times [2024-06-21 17:27:43,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:27:43,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424226625] [2024-06-21 17:27:43,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:27:43,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:27:43,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:27:47,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:27:47,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:27:47,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424226625] [2024-06-21 17:27:47,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424226625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:27:47,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:27:47,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:27:47,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469150317] [2024-06-21 17:27:47,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:27:47,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:27:47,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:27:47,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:27:47,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:27:47,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:27:47,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 422 transitions, 7824 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:47,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:27:47,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:27:47,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:27:50,325 INFO L124 PetriNetUnfolderBase]: 6584/10135 cut-off events. [2024-06-21 17:27:50,325 INFO L125 PetriNetUnfolderBase]: For 558086/558105 co-relation queries the response was YES. [2024-06-21 17:27:50,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95599 conditions, 10135 events. 6584/10135 cut-off events. For 558086/558105 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 62276 event pairs, 2130 based on Foata normal form. 74/10206 useless extension candidates. Maximal degree in co-relation 95489. Up to 8560 conditions per place. [2024-06-21 17:27:50,687 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 448 selfloop transitions, 42 changer transitions 0/493 dead transitions. [2024-06-21 17:27:50,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 493 transitions, 9791 flow [2024-06-21 17:27:50,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:27:50,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:27:50,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-21 17:27:50,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44146341463414634 [2024-06-21 17:27:50,692 INFO L175 Difference]: Start difference. First operand has 225 places, 422 transitions, 7824 flow. Second operand 10 states and 181 transitions. [2024-06-21 17:27:50,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 493 transitions, 9791 flow [2024-06-21 17:27:51,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 493 transitions, 9637 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-21 17:27:51,649 INFO L231 Difference]: Finished difference. Result has 232 places, 424 transitions, 7876 flow [2024-06-21 17:27:51,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7670, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7876, PETRI_PLACES=232, PETRI_TRANSITIONS=424} [2024-06-21 17:27:51,650 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-21 17:27:51,650 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 424 transitions, 7876 flow [2024-06-21 17:27:51,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:51,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:27:51,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:27:51,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 17:27:51,651 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:27:51,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:27:51,652 INFO L85 PathProgramCache]: Analyzing trace with hash 715038984, now seen corresponding path program 5 times [2024-06-21 17:27:51,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:27:51,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142352430] [2024-06-21 17:27:51,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:27:51,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:27:51,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:27:55,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:27:55,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:27:55,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142352430] [2024-06-21 17:27:55,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142352430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:27:55,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:27:55,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:27:55,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88889940] [2024-06-21 17:27:55,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:27:55,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:27:55,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:27:55,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:27:55,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:27:55,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:27:55,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 424 transitions, 7876 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:55,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:27:55,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:27:55,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:27:58,622 INFO L124 PetriNetUnfolderBase]: 6860/10603 cut-off events. [2024-06-21 17:27:58,622 INFO L125 PetriNetUnfolderBase]: For 600543/600562 co-relation queries the response was YES. [2024-06-21 17:27:58,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99143 conditions, 10603 events. 6860/10603 cut-off events. For 600543/600562 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 66069 event pairs, 2394 based on Foata normal form. 82/10682 useless extension candidates. Maximal degree in co-relation 99030. Up to 9862 conditions per place. [2024-06-21 17:27:58,768 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 444 selfloop transitions, 37 changer transitions 0/484 dead transitions. [2024-06-21 17:27:58,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 484 transitions, 9453 flow [2024-06-21 17:27:58,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:27:58,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:27:58,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-21 17:27:58,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219512195121951 [2024-06-21 17:27:58,770 INFO L175 Difference]: Start difference. First operand has 232 places, 424 transitions, 7876 flow. Second operand 10 states and 173 transitions. [2024-06-21 17:27:58,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 484 transitions, 9453 flow [2024-06-21 17:28:00,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 484 transitions, 9321 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-21 17:28:00,039 INFO L231 Difference]: Finished difference. Result has 235 places, 425 transitions, 7894 flow [2024-06-21 17:28:00,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7744, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7894, PETRI_PLACES=235, PETRI_TRANSITIONS=425} [2024-06-21 17:28:00,040 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-21 17:28:00,041 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 425 transitions, 7894 flow [2024-06-21 17:28:00,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:28:00,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:28:00,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:28:00,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 17:28:00,041 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:28:00,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:28:00,042 INFO L85 PathProgramCache]: Analyzing trace with hash 715044936, now seen corresponding path program 1 times [2024-06-21 17:28:00,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:28:00,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33493216] [2024-06-21 17:28:00,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:28:00,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:28:00,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:28:04,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:28:04,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:28:04,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33493216] [2024-06-21 17:28:04,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33493216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:28:04,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:28:04,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:28:04,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112565997] [2024-06-21 17:28:04,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:28:04,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:28:04,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:28:04,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:28:04,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:28:04,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:28:04,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 425 transitions, 7894 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:28:04,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:28:04,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:28:04,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:28:07,765 INFO L124 PetriNetUnfolderBase]: 6912/10690 cut-off events. [2024-06-21 17:28:07,765 INFO L125 PetriNetUnfolderBase]: For 578351/578407 co-relation queries the response was YES. [2024-06-21 17:28:07,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99838 conditions, 10690 events. 6912/10690 cut-off events. For 578351/578407 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 66770 event pairs, 2404 based on Foata normal form. 54/10737 useless extension candidates. Maximal degree in co-relation 99724. Up to 10088 conditions per place. [2024-06-21 17:28:07,898 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 408 selfloop transitions, 74 changer transitions 0/485 dead transitions. [2024-06-21 17:28:07,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 485 transitions, 9504 flow [2024-06-21 17:28:07,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:28:07,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:28:07,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 17:28:07,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-21 17:28:07,899 INFO L175 Difference]: Start difference. First operand has 235 places, 425 transitions, 7894 flow. Second operand 9 states and 166 transitions. [2024-06-21 17:28:07,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 485 transitions, 9504 flow [2024-06-21 17:28:09,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 485 transitions, 9382 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-21 17:28:09,014 INFO L231 Difference]: Finished difference. Result has 236 places, 427 transitions, 8021 flow [2024-06-21 17:28:09,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7772, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8021, PETRI_PLACES=236, PETRI_TRANSITIONS=427} [2024-06-21 17:28:09,015 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-21 17:28:09,015 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 427 transitions, 8021 flow [2024-06-21 17:28:09,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:28:09,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:28:09,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:28:09,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 17:28:09,016 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:28:09,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:28:09,016 INFO L85 PathProgramCache]: Analyzing trace with hash 714894834, now seen corresponding path program 6 times [2024-06-21 17:28:09,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:28:09,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111963532] [2024-06-21 17:28:09,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:28:09,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:28:09,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:28:13,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:28:13,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:28:13,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111963532] [2024-06-21 17:28:13,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111963532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:28:13,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:28:13,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:28:13,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190973014] [2024-06-21 17:28:13,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:28:13,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:28:13,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:28:13,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:28:13,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:28:13,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:28:13,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 427 transitions, 8021 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:28:13,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:28:13,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:28:13,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:28:17,379 INFO L124 PetriNetUnfolderBase]: 7256/11287 cut-off events. [2024-06-21 17:28:17,379 INFO L125 PetriNetUnfolderBase]: For 668043/668062 co-relation queries the response was YES. [2024-06-21 17:28:17,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103025 conditions, 11287 events. 7256/11287 cut-off events. For 668043/668062 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 71827 event pairs, 2487 based on Foata normal form. 130/11414 useless extension candidates. Maximal degree in co-relation 102910. Up to 9480 conditions per place. [2024-06-21 17:28:17,513 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 443 selfloop transitions, 49 changer transitions 0/495 dead transitions. [2024-06-21 17:28:17,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 495 transitions, 9758 flow [2024-06-21 17:28:17,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:28:17,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:28:17,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2024-06-21 17:28:17,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4279379157427938 [2024-06-21 17:28:17,515 INFO L175 Difference]: Start difference. First operand has 236 places, 427 transitions, 8021 flow. Second operand 11 states and 193 transitions. [2024-06-21 17:28:17,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 495 transitions, 9758 flow [2024-06-21 17:28:18,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 495 transitions, 9548 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 17:28:18,650 INFO L231 Difference]: Finished difference. Result has 240 places, 428 transitions, 7996 flow [2024-06-21 17:28:18,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7811, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7996, PETRI_PLACES=240, PETRI_TRANSITIONS=428} [2024-06-21 17:28:18,651 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-21 17:28:18,651 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 428 transitions, 7996 flow [2024-06-21 17:28:18,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:28:18,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:28:18,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:28:18,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 17:28:18,652 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:28:18,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:28:18,652 INFO L85 PathProgramCache]: Analyzing trace with hash 781246090, now seen corresponding path program 2 times [2024-06-21 17:28:18,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:28:18,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596681548] [2024-06-21 17:28:18,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:28:18,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:28:18,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:28:21,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:28:21,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:28:21,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596681548] [2024-06-21 17:28:21,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596681548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:28:21,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:28:21,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:28:21,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565340878] [2024-06-21 17:28:21,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:28:21,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:28:21,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:28:21,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:28:21,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:28:21,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:28:21,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 428 transitions, 7996 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:28:21,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:28:21,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:28:21,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:28:25,888 INFO L124 PetriNetUnfolderBase]: 7450/11601 cut-off events. [2024-06-21 17:28:25,888 INFO L125 PetriNetUnfolderBase]: For 630183/630202 co-relation queries the response was YES. [2024-06-21 17:28:25,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105470 conditions, 11601 events. 7450/11601 cut-off events. For 630183/630202 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 74452 event pairs, 2597 based on Foata normal form. 42/11640 useless extension candidates. Maximal degree in co-relation 105354. Up to 10937 conditions per place. [2024-06-21 17:28:26,017 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 384 selfloop transitions, 96 changer transitions 0/483 dead transitions. [2024-06-21 17:28:26,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 483 transitions, 9520 flow [2024-06-21 17:28:26,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:28:26,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:28:26,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-21 17:28:26,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4073170731707317 [2024-06-21 17:28:26,018 INFO L175 Difference]: Start difference. First operand has 240 places, 428 transitions, 7996 flow. Second operand 10 states and 167 transitions. [2024-06-21 17:28:26,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 483 transitions, 9520 flow [2024-06-21 17:28:27,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 483 transitions, 9372 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-21 17:28:27,066 INFO L231 Difference]: Finished difference. Result has 243 places, 435 transitions, 8214 flow [2024-06-21 17:28:27,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7852, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8214, PETRI_PLACES=243, PETRI_TRANSITIONS=435} [2024-06-21 17:28:27,066 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-21 17:28:27,066 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 435 transitions, 8214 flow [2024-06-21 17:28:27,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:28:27,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:28:27,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:28:27,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 17:28:27,067 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:28:27,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:28:27,067 INFO L85 PathProgramCache]: Analyzing trace with hash 781238650, now seen corresponding path program 3 times [2024-06-21 17:28:27,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:28:27,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190750486] [2024-06-21 17:28:27,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:28:27,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:28:27,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:28:30,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:28:30,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:28:30,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190750486] [2024-06-21 17:28:30,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190750486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:28:30,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:28:30,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:28:30,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454100771] [2024-06-21 17:28:30,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:28:30,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:28:30,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:28:30,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:28:30,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:28:30,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:28:30,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 435 transitions, 8214 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:28:30,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:28:30,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:28:30,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:28:34,536 INFO L124 PetriNetUnfolderBase]: 7473/11646 cut-off events. [2024-06-21 17:28:34,536 INFO L125 PetriNetUnfolderBase]: For 617283/617302 co-relation queries the response was YES. [2024-06-21 17:28:34,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106189 conditions, 11646 events. 7473/11646 cut-off events. For 617283/617302 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 74871 event pairs, 2688 based on Foata normal form. 46/11689 useless extension candidates. Maximal degree in co-relation 106071. Up to 11212 conditions per place. [2024-06-21 17:28:34,658 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 414 selfloop transitions, 65 changer transitions 0/482 dead transitions. [2024-06-21 17:28:34,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 482 transitions, 9617 flow [2024-06-21 17:28:34,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:28:34,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:28:34,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-21 17:28:34,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3926829268292683 [2024-06-21 17:28:34,659 INFO L175 Difference]: Start difference. First operand has 243 places, 435 transitions, 8214 flow. Second operand 10 states and 161 transitions. [2024-06-21 17:28:34,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 482 transitions, 9617 flow [2024-06-21 17:28:35,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 482 transitions, 9387 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-21 17:28:35,828 INFO L231 Difference]: Finished difference. Result has 246 places, 437 transitions, 8176 flow [2024-06-21 17:28:35,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7984, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8176, PETRI_PLACES=246, PETRI_TRANSITIONS=437} [2024-06-21 17:28:35,829 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-21 17:28:35,829 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 437 transitions, 8176 flow [2024-06-21 17:28:35,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:28:35,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:28:35,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:28:35,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 17:28:35,830 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:28:35,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:28:35,830 INFO L85 PathProgramCache]: Analyzing trace with hash -6046192, now seen corresponding path program 7 times [2024-06-21 17:28:35,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:28:35,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000946730] [2024-06-21 17:28:35,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:28:35,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:28:35,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:28:39,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:28:39,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:28:39,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000946730] [2024-06-21 17:28:39,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000946730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:28:39,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:28:39,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:28:39,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707286333] [2024-06-21 17:28:39,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:28:39,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:28:39,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:28:39,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:28:39,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:28:39,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:28:39,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 437 transitions, 8176 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:28:39,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:28:39,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:28:39,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:28:43,707 INFO L124 PetriNetUnfolderBase]: 7749/12114 cut-off events. [2024-06-21 17:28:43,708 INFO L125 PetriNetUnfolderBase]: For 681621/681640 co-relation queries the response was YES. [2024-06-21 17:28:43,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109703 conditions, 12114 events. 7749/12114 cut-off events. For 681621/681640 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 78789 event pairs, 2798 based on Foata normal form. 82/12193 useless extension candidates. Maximal degree in co-relation 109584. Up to 10694 conditions per place. [2024-06-21 17:28:43,841 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 351 selfloop transitions, 154 changer transitions 0/508 dead transitions. [2024-06-21 17:28:43,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 508 transitions, 10052 flow [2024-06-21 17:28:43,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:28:43,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:28:43,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 207 transitions. [2024-06-21 17:28:43,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-21 17:28:43,845 INFO L175 Difference]: Start difference. First operand has 246 places, 437 transitions, 8176 flow. Second operand 12 states and 207 transitions. [2024-06-21 17:28:43,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 508 transitions, 10052 flow [2024-06-21 17:28:44,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 508 transitions, 9876 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-21 17:28:44,941 INFO L231 Difference]: Finished difference. Result has 252 places, 438 transitions, 8391 flow [2024-06-21 17:28:44,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8000, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8391, PETRI_PLACES=252, PETRI_TRANSITIONS=438} [2024-06-21 17:28:44,942 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-21 17:28:44,942 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 438 transitions, 8391 flow [2024-06-21 17:28:44,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:28:44,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:28:44,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:28:44,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 17:28:44,943 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:28:44,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:28:44,943 INFO L85 PathProgramCache]: Analyzing trace with hash -539662, now seen corresponding path program 8 times [2024-06-21 17:28:44,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:28:44,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128801080] [2024-06-21 17:28:44,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:28:44,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:28:44,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:28:47,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:28:47,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:28:47,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128801080] [2024-06-21 17:28:47,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128801080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:28:47,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:28:47,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:28:47,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366211609] [2024-06-21 17:28:47,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:28:47,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:28:47,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:28:47,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:28:47,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:28:47,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 17:28:47,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 438 transitions, 8391 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:28:47,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:28:47,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 17:28:47,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand