./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe016_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/safe016_power.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/safe016_power.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe016_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-7724a2d-m [2024-06-27 21:15:47,334 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:15:47,423 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:15:47,432 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:15:47,432 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:15:47,463 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:15:47,464 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:15:47,465 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:15:47,465 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:15:47,469 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:15:47,469 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:15:47,469 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:15:47,470 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:15:47,472 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:15:47,472 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:15:47,472 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:15:47,472 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:15:47,473 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:15:47,473 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:15:47,473 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:15:47,473 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:15:47,474 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:15:47,474 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:15:47,474 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:15:47,475 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:15:47,475 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:15:47,475 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:15:47,475 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:15:47,476 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:15:47,476 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:15:47,477 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:15:47,477 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:15:47,478 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:15:47,478 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:15:47,478 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:15:47,478 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:15:47,479 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:15:47,479 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:15:47,479 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:15:47,479 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:15:47,479 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:15:47,480 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:15:47,480 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:15:47,480 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 21:15:47,734 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:15:47,758 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:15:47,761 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:15:47,762 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:15:47,762 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:15:47,763 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe016_power.opt.i [2024-06-27 21:15:48,951 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:15:49,224 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:15:49,225 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe016_power.opt.i [2024-06-27 21:15:49,245 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a98183013/c779248f68994035bacae05ac70aa6c5/FLAGe34379461 [2024-06-27 21:15:49,257 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a98183013/c779248f68994035bacae05ac70aa6c5 [2024-06-27 21:15:49,260 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:15:49,263 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:15:49,264 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe016_power.opt.yml/witness.yml [2024-06-27 21:15:49,516 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:15:49,518 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:15:49,519 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:15:49,519 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:15:49,524 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:15:49,524 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:15:49" (1/2) ... [2024-06-27 21:15:49,526 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bacb349 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:15:49, skipping insertion in model container [2024-06-27 21:15:49,526 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:15:49" (1/2) ... [2024-06-27 21:15:49,527 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@506d917e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:15:49, skipping insertion in model container [2024-06-27 21:15:49,527 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:15:49" (2/2) ... [2024-06-27 21:15:49,528 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bacb349 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:15:49, skipping insertion in model container [2024-06-27 21:15:49,528 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:15:49" (2/2) ... [2024-06-27 21:15:49,528 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:15:49,788 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:15:49,790 INFO L97 edCorrectnessWitness]: Location invariant before [L864-L864] (((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0) [2024-06-27 21:15:49,790 INFO L97 edCorrectnessWitness]: Location invariant before [L869-L869] (((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0) [2024-06-27 21:15:49,790 INFO L97 edCorrectnessWitness]: Location invariant before [L868-L868] (((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0) [2024-06-27 21:15:49,790 INFO L97 edCorrectnessWitness]: Location invariant before [L866-L866] (((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0) [2024-06-27 21:15:49,790 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:15:49,791 INFO L106 edCorrectnessWitness]: ghost_update [L862-L862] multithreaded = 1; [2024-06-27 21:15:49,847 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:15:50,257 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:15:50,266 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:15:50,389 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:15:50,425 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:15:50,427 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:15:50 WrapperNode [2024-06-27 21:15:50,427 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:15:50,428 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:15:50,428 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:15:50,428 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:15:50,435 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 27.06 09:15:50" (1/1) ... [2024-06-27 21:15:50,453 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 27.06 09:15:50" (1/1) ... [2024-06-27 21:15:50,491 INFO L138 Inliner]: procedures = 176, calls = 100, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 255 [2024-06-27 21:15:50,500 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:15:50,501 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:15:50,501 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:15:50,502 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:15:50,512 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:15:50" (1/1) ... [2024-06-27 21:15:50,512 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:15:50" (1/1) ... [2024-06-27 21:15:50,530 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:15:50" (1/1) ... [2024-06-27 21:15:50,568 INFO L175 MemorySlicer]: Split 54 memory accesses to 2 slices as follows [2, 52]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 11 writes are split as follows [0, 11]. [2024-06-27 21:15:50,571 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:15:50" (1/1) ... [2024-06-27 21:15:50,572 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:15:50" (1/1) ... [2024-06-27 21:15:50,602 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:15:50" (1/1) ... [2024-06-27 21:15:50,605 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:15:50" (1/1) ... [2024-06-27 21:15:50,611 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:15:50" (1/1) ... [2024-06-27 21:15:50,623 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:15:50" (1/1) ... [2024-06-27 21:15:50,628 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:15:50,629 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:15:50,633 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:15:50,633 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:15:50,634 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:15:50" (1/1) ... [2024-06-27 21:15:50,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:15:50,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:15:50,669 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) [2024-06-27 21:15:50,692 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 [2024-06-27 21:15:50,712 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 21:15:50,713 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 21:15:50,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 21:15:50,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 21:15:50,713 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:15:50,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:15:50,714 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 21:15:50,714 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 21:15:50,714 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 21:15:50,714 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 21:15:50,714 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 21:15:50,715 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 21:15:50,715 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-27 21:15:50,716 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-27 21:15:50,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:15:50,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 21:15:50,717 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:15:50,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:15:50,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:15:50,719 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 21:15:50,928 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:15:50,930 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:15:51,478 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:15:51,478 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:15:52,113 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:15:52,114 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 21:15:52,114 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:15:52 BoogieIcfgContainer [2024-06-27 21:15:52,114 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:15:52,117 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:15:52,117 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:15:52,120 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:15:52,121 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:15:49" (1/4) ... [2024-06-27 21:15:52,121 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@638b01b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:15:52, skipping insertion in model container [2024-06-27 21:15:52,121 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:15:49" (2/4) ... [2024-06-27 21:15:52,122 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@638b01b0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:15:52, skipping insertion in model container [2024-06-27 21:15:52,122 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:15:50" (3/4) ... [2024-06-27 21:15:52,122 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@638b01b0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:15:52, skipping insertion in model container [2024-06-27 21:15:52,122 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:15:52" (4/4) ... [2024-06-27 21:15:52,123 INFO L112 eAbstractionObserver]: Analyzing ICFG safe016_power.opt.i [2024-06-27 21:15:52,140 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:15:52,141 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 21:15:52,141 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:15:52,228 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 21:15:52,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-27 21:15:52,310 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-27 21:15:52,311 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:15:52,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 77 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 21:15:52,313 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-27 21:15:52,316 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-27 21:15:52,329 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:15:52,336 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;@5bd73665, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:15:52,336 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-27 21:15:52,342 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:15:52,342 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 21:15:52,343 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:15:52,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:52,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:15:52,345 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:15:52,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:52,351 INFO L85 PathProgramCache]: Analyzing trace with hash 941500297, now seen corresponding path program 1 times [2024-06-27 21:15:52,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:52,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947283864] [2024-06-27 21:15:52,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:52,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:52,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:54,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:54,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:54,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947283864] [2024-06-27 21:15:54,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947283864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:54,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:54,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:15:54,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006608056] [2024-06-27 21:15:54,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:54,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:15:54,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:54,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:15:54,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:15:54,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:15:54,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:54,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:54,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:15:54,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:57,737 INFO L124 PetriNetUnfolderBase]: 8561/11714 cut-off events. [2024-06-27 21:15:57,737 INFO L125 PetriNetUnfolderBase]: For 178/178 co-relation queries the response was YES. [2024-06-27 21:15:57,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23790 conditions, 11714 events. 8561/11714 cut-off events. For 178/178 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 60199 event pairs, 6368 based on Foata normal form. 1/11535 useless extension candidates. Maximal degree in co-relation 23777. Up to 11694 conditions per place. [2024-06-27 21:15:57,814 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 48 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2024-06-27 21:15:57,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 59 transitions, 245 flow [2024-06-27 21:15:57,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:15:57,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:15:57,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2024-06-27 21:15:57,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5576923076923077 [2024-06-27 21:15:57,826 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 87 transitions. [2024-06-27 21:15:57,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 59 transitions, 245 flow [2024-06-27 21:15:57,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 238 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 21:15:57,831 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-27 21:15:57,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-27 21:15:57,836 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-27 21:15:57,836 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-27 21:15:57,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:57,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:57,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:57,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:15:57,837 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:15:57,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:57,838 INFO L85 PathProgramCache]: Analyzing trace with hash 2121456596, now seen corresponding path program 1 times [2024-06-27 21:15:57,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:57,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795818586] [2024-06-27 21:15:57,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:57,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:57,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:00,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:00,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:00,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795818586] [2024-06-27 21:16:00,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795818586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:00,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:00,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 21:16:00,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722600547] [2024-06-27 21:16:00,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:00,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 21:16:00,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:00,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 21:16:00,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 21:16:00,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-27 21:16:00,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:00,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:00,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-27 21:16:00,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:03,455 INFO L124 PetriNetUnfolderBase]: 10503/14344 cut-off events. [2024-06-27 21:16:03,455 INFO L125 PetriNetUnfolderBase]: For 2656/2675 co-relation queries the response was YES. [2024-06-27 21:16:03,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32805 conditions, 14344 events. 10503/14344 cut-off events. For 2656/2675 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 72789 event pairs, 4227 based on Foata normal form. 26/14359 useless extension candidates. Maximal degree in co-relation 32793. Up to 13871 conditions per place. [2024-06-27 21:16:03,547 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 71 selfloop transitions, 14 changer transitions 0/90 dead transitions. [2024-06-27 21:16:03,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 90 transitions, 419 flow [2024-06-27 21:16:03,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:16:03,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:16:03,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2024-06-27 21:16:03,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5865384615384616 [2024-06-27 21:16:03,551 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 122 transitions. [2024-06-27 21:16:03,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 90 transitions, 419 flow [2024-06-27 21:16:03,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 90 transitions, 414 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:16:03,558 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 223 flow [2024-06-27 21:16:03,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=223, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2024-06-27 21:16:03,559 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 3 predicate places. [2024-06-27 21:16:03,559 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 223 flow [2024-06-27 21:16:03,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:03,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:03,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:03,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:16:03,566 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:16:03,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:03,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1389631853, now seen corresponding path program 1 times [2024-06-27 21:16:03,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:03,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729808763] [2024-06-27 21:16:03,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:03,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:03,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:07,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:07,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:07,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729808763] [2024-06-27 21:16:07,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729808763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:07,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:07,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:16:07,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706478922] [2024-06-27 21:16:07,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:07,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:16:07,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:07,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:16:07,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:16:07,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-27 21:16:07,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 223 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:07,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:07,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-27 21:16:07,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:10,570 INFO L124 PetriNetUnfolderBase]: 10779/14768 cut-off events. [2024-06-27 21:16:10,570 INFO L125 PetriNetUnfolderBase]: For 9984/10055 co-relation queries the response was YES. [2024-06-27 21:16:10,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39342 conditions, 14768 events. 10779/14768 cut-off events. For 9984/10055 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 75671 event pairs, 3371 based on Foata normal form. 84/14841 useless extension candidates. Maximal degree in co-relation 39327. Up to 13873 conditions per place. [2024-06-27 21:16:10,667 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 85 selfloop transitions, 17 changer transitions 0/107 dead transitions. [2024-06-27 21:16:10,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 107 transitions, 569 flow [2024-06-27 21:16:10,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:16:10,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:16:10,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-06-27 21:16:10,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5692307692307692 [2024-06-27 21:16:10,670 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 223 flow. Second operand 5 states and 148 transitions. [2024-06-27 21:16:10,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 107 transitions, 569 flow [2024-06-27 21:16:10,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 107 transitions, 563 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-27 21:16:10,676 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 280 flow [2024-06-27 21:16:10,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=280, PETRI_PLACES=62, PETRI_TRANSITIONS=58} [2024-06-27 21:16:10,678 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2024-06-27 21:16:10,678 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 280 flow [2024-06-27 21:16:10,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:10,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:10,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:10,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:16:10,679 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:16:10,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:10,680 INFO L85 PathProgramCache]: Analyzing trace with hash 958702031, now seen corresponding path program 1 times [2024-06-27 21:16:10,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:10,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608916097] [2024-06-27 21:16:10,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:10,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:10,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:12,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:12,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:12,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608916097] [2024-06-27 21:16:12,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608916097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:12,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:12,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:16:12,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52720450] [2024-06-27 21:16:12,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:12,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:16:12,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:12,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:16:12,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:16:12,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-27 21:16:12,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 58 transitions, 280 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:12,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:12,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-27 21:16:12,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:15,255 INFO L124 PetriNetUnfolderBase]: 8823/12115 cut-off events. [2024-06-27 21:16:15,255 INFO L125 PetriNetUnfolderBase]: For 14172/14214 co-relation queries the response was YES. [2024-06-27 21:16:15,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35290 conditions, 12115 events. 8823/12115 cut-off events. For 14172/14214 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 62699 event pairs, 3908 based on Foata normal form. 46/12150 useless extension candidates. Maximal degree in co-relation 35271. Up to 11798 conditions per place. [2024-06-27 21:16:15,322 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 64 selfloop transitions, 15 changer transitions 0/84 dead transitions. [2024-06-27 21:16:15,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 84 transitions, 500 flow [2024-06-27 21:16:15,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:16:15,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:16:15,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-27 21:16:15,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4653846153846154 [2024-06-27 21:16:15,324 INFO L175 Difference]: Start difference. First operand has 62 places, 58 transitions, 280 flow. Second operand 5 states and 121 transitions. [2024-06-27 21:16:15,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 84 transitions, 500 flow [2024-06-27 21:16:15,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 84 transitions, 463 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 21:16:15,332 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 286 flow [2024-06-27 21:16:15,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=286, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2024-06-27 21:16:15,333 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2024-06-27 21:16:15,333 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 286 flow [2024-06-27 21:16:15,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:15,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:15,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:15,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:16:15,334 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:16:15,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:15,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1902842828, now seen corresponding path program 1 times [2024-06-27 21:16:15,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:15,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304158890] [2024-06-27 21:16:15,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:15,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:15,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:18,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:18,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:18,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304158890] [2024-06-27 21:16:18,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304158890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:18,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:18,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:16:18,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241846784] [2024-06-27 21:16:18,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:18,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:16:18,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:18,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:16:18,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:16:18,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-27 21:16:18,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 286 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:18,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:18,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-27 21:16:18,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:21,386 INFO L124 PetriNetUnfolderBase]: 9052/12458 cut-off events. [2024-06-27 21:16:21,386 INFO L125 PetriNetUnfolderBase]: For 17802/17844 co-relation queries the response was YES. [2024-06-27 21:16:21,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37076 conditions, 12458 events. 9052/12458 cut-off events. For 17802/17844 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 64984 event pairs, 3505 based on Foata normal form. 70/12517 useless extension candidates. Maximal degree in co-relation 37055. Up to 11795 conditions per place. [2024-06-27 21:16:21,445 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 79 selfloop transitions, 18 changer transitions 0/102 dead transitions. [2024-06-27 21:16:21,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 102 transitions, 602 flow [2024-06-27 21:16:21,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:16:21,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:16:21,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 21:16:21,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47435897435897434 [2024-06-27 21:16:21,450 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 286 flow. Second operand 6 states and 148 transitions. [2024-06-27 21:16:21,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 102 transitions, 602 flow [2024-06-27 21:16:21,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 102 transitions, 573 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 21:16:21,462 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 332 flow [2024-06-27 21:16:21,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=332, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2024-06-27 21:16:21,465 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 12 predicate places. [2024-06-27 21:16:21,465 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 332 flow [2024-06-27 21:16:21,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:21,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:21,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:21,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:16:21,466 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:16:21,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:21,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1000510303, now seen corresponding path program 1 times [2024-06-27 21:16:21,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:21,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831982321] [2024-06-27 21:16:21,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:21,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:21,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:24,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:24,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:24,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831982321] [2024-06-27 21:16:24,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831982321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:24,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:24,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:16:24,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048544932] [2024-06-27 21:16:24,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:24,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:16:24,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:24,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:16:24,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:16:24,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-27 21:16:24,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 332 flow. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:24,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:24,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-27 21:16:24,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:26,628 INFO L124 PetriNetUnfolderBase]: 9045/12436 cut-off events. [2024-06-27 21:16:26,628 INFO L125 PetriNetUnfolderBase]: For 24239/24239 co-relation queries the response was YES. [2024-06-27 21:16:26,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39499 conditions, 12436 events. 9045/12436 cut-off events. For 24239/24239 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 64408 event pairs, 4806 based on Foata normal form. 2/12435 useless extension candidates. Maximal degree in co-relation 39477. Up to 12405 conditions per place. [2024-06-27 21:16:26,715 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 68 selfloop transitions, 10 changer transitions 0/83 dead transitions. [2024-06-27 21:16:26,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 83 transitions, 560 flow [2024-06-27 21:16:26,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:16:26,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:16:26,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2024-06-27 21:16:26,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41923076923076924 [2024-06-27 21:16:26,718 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 332 flow. Second operand 5 states and 109 transitions. [2024-06-27 21:16:26,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 83 transitions, 560 flow [2024-06-27 21:16:26,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 83 transitions, 517 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 21:16:26,739 INFO L231 Difference]: Finished difference. Result has 68 places, 65 transitions, 354 flow [2024-06-27 21:16:26,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=354, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2024-06-27 21:16:26,740 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 13 predicate places. [2024-06-27 21:16:26,740 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 354 flow [2024-06-27 21:16:26,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:26,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:26,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:26,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:16:26,741 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:16:26,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:26,742 INFO L85 PathProgramCache]: Analyzing trace with hash -459630447, now seen corresponding path program 1 times [2024-06-27 21:16:26,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:26,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226465541] [2024-06-27 21:16:26,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:26,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:26,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:30,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:30,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226465541] [2024-06-27 21:16:30,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226465541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:30,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:30,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:16:30,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022772318] [2024-06-27 21:16:30,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:30,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:16:30,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:30,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:16:30,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:16:30,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 52 [2024-06-27 21:16:30,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 354 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:30,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:30,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 52 [2024-06-27 21:16:30,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:32,774 INFO L124 PetriNetUnfolderBase]: 10873/14931 cut-off events. [2024-06-27 21:16:32,774 INFO L125 PetriNetUnfolderBase]: For 38380/38471 co-relation queries the response was YES. [2024-06-27 21:16:32,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49369 conditions, 14931 events. 10873/14931 cut-off events. For 38380/38471 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 76788 event pairs, 2633 based on Foata normal form. 81/14996 useless extension candidates. Maximal degree in co-relation 49346. Up to 13311 conditions per place. [2024-06-27 21:16:32,846 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 87 selfloop transitions, 21 changer transitions 0/112 dead transitions. [2024-06-27 21:16:32,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 112 transitions, 742 flow [2024-06-27 21:16:32,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:16:32,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:16:32,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-27 21:16:32,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 21:16:32,848 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 354 flow. Second operand 6 states and 143 transitions. [2024-06-27 21:16:32,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 112 transitions, 742 flow [2024-06-27 21:16:32,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 112 transitions, 697 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 21:16:32,862 INFO L231 Difference]: Finished difference. Result has 70 places, 69 transitions, 408 flow [2024-06-27 21:16:32,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=408, PETRI_PLACES=70, PETRI_TRANSITIONS=69} [2024-06-27 21:16:32,863 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 15 predicate places. [2024-06-27 21:16:32,863 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 408 flow [2024-06-27 21:16:32,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:32,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:32,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:32,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:16:32,864 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:16:32,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:32,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1370247985, now seen corresponding path program 1 times [2024-06-27 21:16:32,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:32,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886956563] [2024-06-27 21:16:32,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:32,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:35,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:35,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:35,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886956563] [2024-06-27 21:16:35,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886956563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:35,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:35,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:16:35,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615449029] [2024-06-27 21:16:35,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:35,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:16:35,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:35,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:16:35,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:16:35,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 52 [2024-06-27 21:16:35,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 408 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:35,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:35,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 52 [2024-06-27 21:16:35,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:38,391 INFO L124 PetriNetUnfolderBase]: 10819/14853 cut-off events. [2024-06-27 21:16:38,391 INFO L125 PetriNetUnfolderBase]: For 48377/48474 co-relation queries the response was YES. [2024-06-27 21:16:38,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51319 conditions, 14853 events. 10819/14853 cut-off events. For 48377/48474 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 76279 event pairs, 2603 based on Foata normal form. 81/14918 useless extension candidates. Maximal degree in co-relation 51296. Up to 13287 conditions per place. [2024-06-27 21:16:38,475 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 84 selfloop transitions, 21 changer transitions 0/109 dead transitions. [2024-06-27 21:16:38,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 109 transitions, 704 flow [2024-06-27 21:16:38,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:16:38,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:16:38,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-27 21:16:38,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44871794871794873 [2024-06-27 21:16:38,477 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 408 flow. Second operand 6 states and 140 transitions. [2024-06-27 21:16:38,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 109 transitions, 704 flow [2024-06-27 21:16:38,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 109 transitions, 671 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-27 21:16:38,516 INFO L231 Difference]: Finished difference. Result has 73 places, 68 transitions, 410 flow [2024-06-27 21:16:38,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=410, PETRI_PLACES=73, PETRI_TRANSITIONS=68} [2024-06-27 21:16:38,516 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 18 predicate places. [2024-06-27 21:16:38,517 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 68 transitions, 410 flow [2024-06-27 21:16:38,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:38,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:38,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:38,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:16:38,517 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:16:38,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:38,518 INFO L85 PathProgramCache]: Analyzing trace with hash -951046096, now seen corresponding path program 1 times [2024-06-27 21:16:38,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:38,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947825067] [2024-06-27 21:16:38,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:38,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:38,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:41,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:41,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:41,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947825067] [2024-06-27 21:16:41,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947825067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:41,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:41,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:16:41,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164695096] [2024-06-27 21:16:41,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:41,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:16:41,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:41,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:16:41,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:16:41,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 52 [2024-06-27 21:16:41,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 68 transitions, 410 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:41,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:41,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 52 [2024-06-27 21:16:41,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:44,273 INFO L124 PetriNetUnfolderBase]: 10845/14859 cut-off events. [2024-06-27 21:16:44,273 INFO L125 PetriNetUnfolderBase]: For 54762/54762 co-relation queries the response was YES. [2024-06-27 21:16:44,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52771 conditions, 14859 events. 10845/14859 cut-off events. For 54762/54762 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 76267 event pairs, 5232 based on Foata normal form. 8/14865 useless extension candidates. Maximal degree in co-relation 52746. Up to 14737 conditions per place. [2024-06-27 21:16:44,338 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 94 selfloop transitions, 20 changer transitions 0/118 dead transitions. [2024-06-27 21:16:44,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 118 transitions, 854 flow [2024-06-27 21:16:44,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:16:44,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:16:44,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-27 21:16:44,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230769230769231 [2024-06-27 21:16:44,340 INFO L175 Difference]: Start difference. First operand has 73 places, 68 transitions, 410 flow. Second operand 6 states and 132 transitions. [2024-06-27 21:16:44,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 118 transitions, 854 flow [2024-06-27 21:16:44,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 118 transitions, 792 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 21:16:44,395 INFO L231 Difference]: Finished difference. Result has 76 places, 86 transitions, 541 flow [2024-06-27 21:16:44,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=541, PETRI_PLACES=76, PETRI_TRANSITIONS=86} [2024-06-27 21:16:44,396 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 21 predicate places. [2024-06-27 21:16:44,396 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 86 transitions, 541 flow [2024-06-27 21:16:44,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:44,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:44,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:44,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:16:44,397 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:16:44,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:44,397 INFO L85 PathProgramCache]: Analyzing trace with hash -447532502, now seen corresponding path program 1 times [2024-06-27 21:16:44,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:44,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443003072] [2024-06-27 21:16:44,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:44,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:44,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:47,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:47,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:47,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443003072] [2024-06-27 21:16:47,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443003072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:47,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:47,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:16:47,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571783644] [2024-06-27 21:16:47,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:47,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:16:47,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:47,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:16:47,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:16:47,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-27 21:16:47,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 86 transitions, 541 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:47,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:47,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-27 21:16:47,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:50,106 INFO L124 PetriNetUnfolderBase]: 10624/14720 cut-off events. [2024-06-27 21:16:50,106 INFO L125 PetriNetUnfolderBase]: For 70314/70343 co-relation queries the response was YES. [2024-06-27 21:16:50,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56573 conditions, 14720 events. 10624/14720 cut-off events. For 70314/70343 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 76758 event pairs, 4081 based on Foata normal form. 36/14744 useless extension candidates. Maximal degree in co-relation 56545. Up to 13770 conditions per place. [2024-06-27 21:16:50,178 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 96 selfloop transitions, 34 changer transitions 0/138 dead transitions. [2024-06-27 21:16:50,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 138 transitions, 1081 flow [2024-06-27 21:16:50,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:16:50,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:16:50,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-27 21:16:50,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2024-06-27 21:16:50,180 INFO L175 Difference]: Start difference. First operand has 76 places, 86 transitions, 541 flow. Second operand 6 states and 146 transitions. [2024-06-27 21:16:50,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 138 transitions, 1081 flow [2024-06-27 21:16:50,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 138 transitions, 1059 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-27 21:16:50,267 INFO L231 Difference]: Finished difference. Result has 82 places, 101 transitions, 752 flow [2024-06-27 21:16:50,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=752, PETRI_PLACES=82, PETRI_TRANSITIONS=101} [2024-06-27 21:16:50,268 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 27 predicate places. [2024-06-27 21:16:50,268 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 101 transitions, 752 flow [2024-06-27 21:16:50,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:50,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:50,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:50,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:16:50,269 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:16:50,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:50,269 INFO L85 PathProgramCache]: Analyzing trace with hash 616299148, now seen corresponding path program 2 times [2024-06-27 21:16:50,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:50,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630082305] [2024-06-27 21:16:50,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:50,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:50,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:52,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:52,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:52,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630082305] [2024-06-27 21:16:52,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630082305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:52,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:52,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:16:52,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475334950] [2024-06-27 21:16:52,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:52,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:16:52,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:52,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:16:52,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:16:52,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-27 21:16:52,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 101 transitions, 752 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:52,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:52,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-27 21:16:52,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:55,655 INFO L124 PetriNetUnfolderBase]: 10857/15004 cut-off events. [2024-06-27 21:16:55,656 INFO L125 PetriNetUnfolderBase]: For 91406/91406 co-relation queries the response was YES. [2024-06-27 21:16:55,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63261 conditions, 15004 events. 10857/15004 cut-off events. For 91406/91406 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 77960 event pairs, 5137 based on Foata normal form. 16/15016 useless extension candidates. Maximal degree in co-relation 63229. Up to 14588 conditions per place. [2024-06-27 21:16:55,734 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 112 selfloop transitions, 24 changer transitions 0/144 dead transitions. [2024-06-27 21:16:55,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 144 transitions, 1239 flow [2024-06-27 21:16:55,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:16:55,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:16:55,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-27 21:16:55,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4175824175824176 [2024-06-27 21:16:55,738 INFO L175 Difference]: Start difference. First operand has 82 places, 101 transitions, 752 flow. Second operand 7 states and 152 transitions. [2024-06-27 21:16:55,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 144 transitions, 1239 flow [2024-06-27 21:16:55,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 144 transitions, 1201 flow, removed 18 selfloop flow, removed 1 redundant places. [2024-06-27 21:16:55,879 INFO L231 Difference]: Finished difference. Result has 89 places, 110 transitions, 894 flow [2024-06-27 21:16:55,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=716, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=894, PETRI_PLACES=89, PETRI_TRANSITIONS=110} [2024-06-27 21:16:55,879 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 34 predicate places. [2024-06-27 21:16:55,879 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 110 transitions, 894 flow [2024-06-27 21:16:55,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:55,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:55,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:55,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 21:16:55,880 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:16:55,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:55,880 INFO L85 PathProgramCache]: Analyzing trace with hash -726121682, now seen corresponding path program 1 times [2024-06-27 21:16:55,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:55,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725159850] [2024-06-27 21:16:55,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:55,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:55,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:58,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:58,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:58,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725159850] [2024-06-27 21:16:58,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725159850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:58,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:58,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:16:58,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357254242] [2024-06-27 21:16:58,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:58,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:16:58,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:58,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:16:58,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:16:58,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 52 [2024-06-27 21:16:58,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 110 transitions, 894 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:58,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:58,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 52 [2024-06-27 21:16:58,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:01,461 INFO L124 PetriNetUnfolderBase]: 11387/15608 cut-off events. [2024-06-27 21:17:01,462 INFO L125 PetriNetUnfolderBase]: For 102648/102738 co-relation queries the response was YES. [2024-06-27 21:17:01,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66227 conditions, 15608 events. 11387/15608 cut-off events. For 102648/102738 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 80348 event pairs, 4211 based on Foata normal form. 81/15677 useless extension candidates. Maximal degree in co-relation 66191. Up to 14557 conditions per place. [2024-06-27 21:17:01,557 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 109 selfloop transitions, 45 changer transitions 0/158 dead transitions. [2024-06-27 21:17:01,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 158 transitions, 1450 flow [2024-06-27 21:17:01,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:17:01,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:17:01,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-27 21:17:01,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2024-06-27 21:17:01,559 INFO L175 Difference]: Start difference. First operand has 89 places, 110 transitions, 894 flow. Second operand 6 states and 146 transitions. [2024-06-27 21:17:01,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 158 transitions, 1450 flow [2024-06-27 21:17:01,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 158 transitions, 1366 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 21:17:01,682 INFO L231 Difference]: Finished difference. Result has 90 places, 114 transitions, 960 flow [2024-06-27 21:17:01,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=960, PETRI_PLACES=90, PETRI_TRANSITIONS=114} [2024-06-27 21:17:01,683 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 35 predicate places. [2024-06-27 21:17:01,684 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 114 transitions, 960 flow [2024-06-27 21:17:01,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:01,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:01,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:01,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:17:01,684 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:17:01,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:01,685 INFO L85 PathProgramCache]: Analyzing trace with hash -691689021, now seen corresponding path program 1 times [2024-06-27 21:17:01,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:01,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886749979] [2024-06-27 21:17:01,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:01,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:01,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:04,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:04,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:04,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886749979] [2024-06-27 21:17:04,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886749979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:04,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:04,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:17:04,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538657503] [2024-06-27 21:17:04,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:04,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:17:04,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:04,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:17:04,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:17:04,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 52 [2024-06-27 21:17:04,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 114 transitions, 960 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:04,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:04,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 52 [2024-06-27 21:17:04,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:08,277 INFO L124 PetriNetUnfolderBase]: 11553/15790 cut-off events. [2024-06-27 21:17:08,277 INFO L125 PetriNetUnfolderBase]: For 113466/113473 co-relation queries the response was YES. [2024-06-27 21:17:08,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68407 conditions, 15790 events. 11553/15790 cut-off events. For 113466/113473 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 81235 event pairs, 5154 based on Foata normal form. 14/15801 useless extension candidates. Maximal degree in co-relation 68371. Up to 15529 conditions per place. [2024-06-27 21:17:08,361 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 116 selfloop transitions, 42 changer transitions 0/162 dead transitions. [2024-06-27 21:17:08,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 162 transitions, 1540 flow [2024-06-27 21:17:08,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:17:08,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:17:08,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 21:17:08,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870192307692308 [2024-06-27 21:17:08,363 INFO L175 Difference]: Start difference. First operand has 90 places, 114 transitions, 960 flow. Second operand 8 states and 161 transitions. [2024-06-27 21:17:08,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 162 transitions, 1540 flow [2024-06-27 21:17:08,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 162 transitions, 1401 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 21:17:08,525 INFO L231 Difference]: Finished difference. Result has 96 places, 130 transitions, 1107 flow [2024-06-27 21:17:08,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=821, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1107, PETRI_PLACES=96, PETRI_TRANSITIONS=130} [2024-06-27 21:17:08,526 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 41 predicate places. [2024-06-27 21:17:08,526 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 130 transitions, 1107 flow [2024-06-27 21:17:08,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:08,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:08,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:08,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:17:08,527 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:17:08,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:08,528 INFO L85 PathProgramCache]: Analyzing trace with hash -725852912, now seen corresponding path program 2 times [2024-06-27 21:17:08,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:08,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591369580] [2024-06-27 21:17:08,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:08,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:08,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:11,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:11,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:11,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591369580] [2024-06-27 21:17:11,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591369580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:11,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:11,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:17:11,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697757701] [2024-06-27 21:17:11,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:11,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:17:11,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:11,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:17:11,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:17:11,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 52 [2024-06-27 21:17:11,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 130 transitions, 1107 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:11,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:11,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 52 [2024-06-27 21:17:11,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:14,228 INFO L124 PetriNetUnfolderBase]: 11491/15708 cut-off events. [2024-06-27 21:17:14,228 INFO L125 PetriNetUnfolderBase]: For 134972/134979 co-relation queries the response was YES. [2024-06-27 21:17:14,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71947 conditions, 15708 events. 11491/15708 cut-off events. For 134972/134979 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 80371 event pairs, 5185 based on Foata normal form. 18/15723 useless extension candidates. Maximal degree in co-relation 71909. Up to 15441 conditions per place. [2024-06-27 21:17:14,309 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 135 selfloop transitions, 24 changer transitions 0/163 dead transitions. [2024-06-27 21:17:14,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 163 transitions, 1505 flow [2024-06-27 21:17:14,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:17:14,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:17:14,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-27 21:17:14,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40384615384615385 [2024-06-27 21:17:14,310 INFO L175 Difference]: Start difference. First operand has 96 places, 130 transitions, 1107 flow. Second operand 7 states and 147 transitions. [2024-06-27 21:17:14,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 163 transitions, 1505 flow [2024-06-27 21:17:14,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 163 transitions, 1418 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-27 21:17:14,465 INFO L231 Difference]: Finished difference. Result has 100 places, 130 transitions, 1079 flow [2024-06-27 21:17:14,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1020, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1079, PETRI_PLACES=100, PETRI_TRANSITIONS=130} [2024-06-27 21:17:14,466 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 45 predicate places. [2024-06-27 21:17:14,466 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 130 transitions, 1079 flow [2024-06-27 21:17:14,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:14,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:14,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:14,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 21:17:14,467 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:17:14,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:14,467 INFO L85 PathProgramCache]: Analyzing trace with hash 872794127, now seen corresponding path program 2 times [2024-06-27 21:17:14,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:14,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312607786] [2024-06-27 21:17:14,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:14,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:14,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:17,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:17,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:17,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312607786] [2024-06-27 21:17:17,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312607786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:17,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:17,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:17:17,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966380761] [2024-06-27 21:17:17,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:17,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:17:17,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:17,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:17:17,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:17:17,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 52 [2024-06-27 21:17:17,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 130 transitions, 1079 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:17,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:17,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 52 [2024-06-27 21:17:17,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:20,947 INFO L124 PetriNetUnfolderBase]: 11561/15798 cut-off events. [2024-06-27 21:17:20,948 INFO L125 PetriNetUnfolderBase]: For 146631/146638 co-relation queries the response was YES. [2024-06-27 21:17:21,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73309 conditions, 15798 events. 11561/15798 cut-off events. For 146631/146638 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 81073 event pairs, 5153 based on Foata normal form. 14/15809 useless extension candidates. Maximal degree in co-relation 73269. Up to 15387 conditions per place. [2024-06-27 21:17:21,074 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 126 selfloop transitions, 56 changer transitions 0/186 dead transitions. [2024-06-27 21:17:21,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 186 transitions, 1815 flow [2024-06-27 21:17:21,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:17:21,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:17:21,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-27 21:17:21,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:17:21,076 INFO L175 Difference]: Start difference. First operand has 100 places, 130 transitions, 1079 flow. Second operand 7 states and 156 transitions. [2024-06-27 21:17:21,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 186 transitions, 1815 flow [2024-06-27 21:17:21,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 186 transitions, 1767 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 21:17:21,320 INFO L231 Difference]: Finished difference. Result has 103 places, 148 transitions, 1411 flow [2024-06-27 21:17:21,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1031, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1411, PETRI_PLACES=103, PETRI_TRANSITIONS=148} [2024-06-27 21:17:21,321 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 48 predicate places. [2024-06-27 21:17:21,321 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 148 transitions, 1411 flow [2024-06-27 21:17:21,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:21,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:21,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:21,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 21:17:21,322 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:17:21,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:21,323 INFO L85 PathProgramCache]: Analyzing trace with hash -988603449, now seen corresponding path program 1 times [2024-06-27 21:17:21,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:21,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468844321] [2024-06-27 21:17:21,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:21,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:21,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:24,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:24,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:24,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468844321] [2024-06-27 21:17:24,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468844321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:24,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:24,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:17:24,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71134106] [2024-06-27 21:17:24,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:24,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:17:24,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:24,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:17:24,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:17:24,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 52 [2024-06-27 21:17:24,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 148 transitions, 1411 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:24,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:24,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 52 [2024-06-27 21:17:24,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:27,880 INFO L124 PetriNetUnfolderBase]: 11849/16169 cut-off events. [2024-06-27 21:17:27,880 INFO L125 PetriNetUnfolderBase]: For 178718/178718 co-relation queries the response was YES. [2024-06-27 21:17:27,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79753 conditions, 16169 events. 11849/16169 cut-off events. For 178718/178718 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 82848 event pairs, 5079 based on Foata normal form. 16/16182 useless extension candidates. Maximal degree in co-relation 79710. Up to 15505 conditions per place. [2024-06-27 21:17:28,005 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 182 selfloop transitions, 37 changer transitions 0/223 dead transitions. [2024-06-27 21:17:28,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 223 transitions, 2318 flow [2024-06-27 21:17:28,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:17:28,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:17:28,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-27 21:17:28,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45604395604395603 [2024-06-27 21:17:28,007 INFO L175 Difference]: Start difference. First operand has 103 places, 148 transitions, 1411 flow. Second operand 7 states and 166 transitions. [2024-06-27 21:17:28,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 223 transitions, 2318 flow [2024-06-27 21:17:28,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 223 transitions, 2222 flow, removed 47 selfloop flow, removed 1 redundant places. [2024-06-27 21:17:28,296 INFO L231 Difference]: Finished difference. Result has 111 places, 168 transitions, 1615 flow [2024-06-27 21:17:28,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1339, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1615, PETRI_PLACES=111, PETRI_TRANSITIONS=168} [2024-06-27 21:17:28,297 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 56 predicate places. [2024-06-27 21:17:28,297 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 168 transitions, 1615 flow [2024-06-27 21:17:28,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:28,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:28,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:28,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 21:17:28,298 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:17:28,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:28,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1954005989, now seen corresponding path program 2 times [2024-06-27 21:17:28,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:28,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589084294] [2024-06-27 21:17:28,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:28,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:28,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:31,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:31,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:31,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589084294] [2024-06-27 21:17:31,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589084294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:31,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:31,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:17:31,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528391301] [2024-06-27 21:17:31,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:31,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:17:31,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:31,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:17:31,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:17:31,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 52 [2024-06-27 21:17:31,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 168 transitions, 1615 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:31,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:31,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 52 [2024-06-27 21:17:31,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:34,814 INFO L124 PetriNetUnfolderBase]: 12005/16371 cut-off events. [2024-06-27 21:17:34,814 INFO L125 PetriNetUnfolderBase]: For 190333/190333 co-relation queries the response was YES. [2024-06-27 21:17:34,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82014 conditions, 16371 events. 12005/16371 cut-off events. For 190333/190333 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 83850 event pairs, 5184 based on Foata normal form. 16/16385 useless extension candidates. Maximal degree in co-relation 81966. Up to 15917 conditions per place. [2024-06-27 21:17:34,948 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 188 selfloop transitions, 31 changer transitions 0/223 dead transitions. [2024-06-27 21:17:34,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 223 transitions, 2422 flow [2024-06-27 21:17:34,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:17:34,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:17:34,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-27 21:17:34,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43131868131868134 [2024-06-27 21:17:34,951 INFO L175 Difference]: Start difference. First operand has 111 places, 168 transitions, 1615 flow. Second operand 7 states and 157 transitions. [2024-06-27 21:17:34,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 223 transitions, 2422 flow [2024-06-27 21:17:35,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 223 transitions, 2328 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-27 21:17:35,474 INFO L231 Difference]: Finished difference. Result has 117 places, 178 transitions, 1716 flow [2024-06-27 21:17:35,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1537, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1716, PETRI_PLACES=117, PETRI_TRANSITIONS=178} [2024-06-27 21:17:35,474 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 62 predicate places. [2024-06-27 21:17:35,475 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 178 transitions, 1716 flow [2024-06-27 21:17:35,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:35,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:35,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:35,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 21:17:35,475 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:17:35,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:35,476 INFO L85 PathProgramCache]: Analyzing trace with hash -840786459, now seen corresponding path program 3 times [2024-06-27 21:17:35,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:35,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268075630] [2024-06-27 21:17:35,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:35,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:35,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:38,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:38,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:38,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268075630] [2024-06-27 21:17:38,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268075630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:38,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:38,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:17:38,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605995622] [2024-06-27 21:17:38,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:38,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:17:38,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:38,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:17:38,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:17:38,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 52 [2024-06-27 21:17:38,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 178 transitions, 1716 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:38,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:38,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 52 [2024-06-27 21:17:38,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:41,729 INFO L124 PetriNetUnfolderBase]: 12057/16439 cut-off events. [2024-06-27 21:17:41,729 INFO L125 PetriNetUnfolderBase]: For 209464/209464 co-relation queries the response was YES. [2024-06-27 21:17:41,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84209 conditions, 16439 events. 12057/16439 cut-off events. For 209464/209464 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 84135 event pairs, 5168 based on Foata normal form. 16/16453 useless extension candidates. Maximal degree in co-relation 84158. Up to 15961 conditions per place. [2024-06-27 21:17:41,885 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 198 selfloop transitions, 39 changer transitions 0/241 dead transitions. [2024-06-27 21:17:41,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 241 transitions, 2504 flow [2024-06-27 21:17:41,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:17:41,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:17:41,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-27 21:17:41,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42094017094017094 [2024-06-27 21:17:41,887 INFO L175 Difference]: Start difference. First operand has 117 places, 178 transitions, 1716 flow. Second operand 9 states and 197 transitions. [2024-06-27 21:17:41,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 241 transitions, 2504 flow [2024-06-27 21:17:42,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 241 transitions, 2452 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 21:17:42,230 INFO L231 Difference]: Finished difference. Result has 123 places, 183 transitions, 1816 flow [2024-06-27 21:17:42,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1664, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1816, PETRI_PLACES=123, PETRI_TRANSITIONS=183} [2024-06-27 21:17:42,230 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 68 predicate places. [2024-06-27 21:17:42,230 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 183 transitions, 1816 flow [2024-06-27 21:17:42,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:42,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:42,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:42,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 21:17:42,231 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:17:42,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:42,232 INFO L85 PathProgramCache]: Analyzing trace with hash 872808015, now seen corresponding path program 1 times [2024-06-27 21:17:42,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:42,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962808972] [2024-06-27 21:17:42,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:42,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:42,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:46,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:46,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:46,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962808972] [2024-06-27 21:17:46,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962808972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:46,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:46,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:17:46,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538209015] [2024-06-27 21:17:46,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:46,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:17:46,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:46,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:17:46,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:17:46,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 52 [2024-06-27 21:17:46,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 183 transitions, 1816 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:46,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:46,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 52 [2024-06-27 21:17:46,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:49,898 INFO L124 PetriNetUnfolderBase]: 12141/16555 cut-off events. [2024-06-27 21:17:49,898 INFO L125 PetriNetUnfolderBase]: For 228897/228897 co-relation queries the response was YES. [2024-06-27 21:17:49,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86577 conditions, 16555 events. 12141/16555 cut-off events. For 228897/228897 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 84844 event pairs, 5200 based on Foata normal form. 16/16569 useless extension candidates. Maximal degree in co-relation 86524. Up to 16339 conditions per place. [2024-06-27 21:17:50,005 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 200 selfloop transitions, 25 changer transitions 0/229 dead transitions. [2024-06-27 21:17:50,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 229 transitions, 2512 flow [2024-06-27 21:17:50,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:17:50,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:17:50,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-27 21:17:50,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230769230769231 [2024-06-27 21:17:50,007 INFO L175 Difference]: Start difference. First operand has 123 places, 183 transitions, 1816 flow. Second operand 7 states and 154 transitions. [2024-06-27 21:17:50,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 229 transitions, 2512 flow [2024-06-27 21:17:50,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 229 transitions, 2406 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-27 21:17:50,301 INFO L231 Difference]: Finished difference. Result has 123 places, 186 transitions, 1825 flow [2024-06-27 21:17:50,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1710, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1825, PETRI_PLACES=123, PETRI_TRANSITIONS=186} [2024-06-27 21:17:50,302 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 68 predicate places. [2024-06-27 21:17:50,302 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 186 transitions, 1825 flow [2024-06-27 21:17:50,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:50,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:50,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:50,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 21:17:50,302 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:17:50,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:50,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1685995029, now seen corresponding path program 1 times [2024-06-27 21:17:50,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:50,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378600157] [2024-06-27 21:17:50,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:50,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:50,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:53,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:53,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:53,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378600157] [2024-06-27 21:17:53,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378600157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:53,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:53,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:17:53,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586450683] [2024-06-27 21:17:53,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:53,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:17:53,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:53,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:17:53,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:17:53,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 52 [2024-06-27 21:17:53,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 186 transitions, 1825 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:53,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:53,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 52 [2024-06-27 21:17:53,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:58,243 INFO L124 PetriNetUnfolderBase]: 14685/19866 cut-off events. [2024-06-27 21:17:58,243 INFO L125 PetriNetUnfolderBase]: For 304866/304951 co-relation queries the response was YES. [2024-06-27 21:17:58,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105843 conditions, 19866 events. 14685/19866 cut-off events. For 304866/304951 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 102868 event pairs, 4057 based on Foata normal form. 116/19970 useless extension candidates. Maximal degree in co-relation 105789. Up to 15537 conditions per place. [2024-06-27 21:17:58,397 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 179 selfloop transitions, 112 changer transitions 0/295 dead transitions. [2024-06-27 21:17:58,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 295 transitions, 3289 flow [2024-06-27 21:17:58,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:17:58,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:17:58,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-06-27 21:17:58,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-27 21:17:58,400 INFO L175 Difference]: Start difference. First operand has 123 places, 186 transitions, 1825 flow. Second operand 10 states and 245 transitions. [2024-06-27 21:17:58,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 295 transitions, 3289 flow [2024-06-27 21:17:58,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 295 transitions, 3208 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 21:17:58,766 INFO L231 Difference]: Finished difference. Result has 131 places, 212 transitions, 2352 flow [2024-06-27 21:17:58,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1744, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2352, PETRI_PLACES=131, PETRI_TRANSITIONS=212} [2024-06-27 21:17:58,767 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 76 predicate places. [2024-06-27 21:17:58,767 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 212 transitions, 2352 flow [2024-06-27 21:17:58,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:58,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:58,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:58,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 21:17:58,768 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:17:58,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:58,769 INFO L85 PathProgramCache]: Analyzing trace with hash 32468483, now seen corresponding path program 2 times [2024-06-27 21:17:58,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:58,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021385865] [2024-06-27 21:17:58,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:58,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:58,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:02,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:02,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:02,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021385865] [2024-06-27 21:18:02,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021385865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:02,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:02,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:18:02,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9796622] [2024-06-27 21:18:02,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:02,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:18:02,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:02,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:18:02,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:18:02,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 52 [2024-06-27 21:18:02,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 212 transitions, 2352 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:02,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:02,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 52 [2024-06-27 21:18:02,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:07,789 INFO L124 PetriNetUnfolderBase]: 16447/22116 cut-off events. [2024-06-27 21:18:07,789 INFO L125 PetriNetUnfolderBase]: For 390535/390542 co-relation queries the response was YES. [2024-06-27 21:18:07,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129551 conditions, 22116 events. 16447/22116 cut-off events. For 390535/390542 co-relation queries the response was YES. Maximal size of possible extension queue 747. Compared 114597 event pairs, 6155 based on Foata normal form. 54/22167 useless extension candidates. Maximal degree in co-relation 129493. Up to 19571 conditions per place. [2024-06-27 21:18:07,990 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 220 selfloop transitions, 76 changer transitions 0/300 dead transitions. [2024-06-27 21:18:07,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 300 transitions, 3714 flow [2024-06-27 21:18:07,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:18:07,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:18:07,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-27 21:18:07,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 21:18:07,993 INFO L175 Difference]: Start difference. First operand has 131 places, 212 transitions, 2352 flow. Second operand 10 states and 221 transitions. [2024-06-27 21:18:07,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 300 transitions, 3714 flow [2024-06-27 21:18:08,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 300 transitions, 3479 flow, removed 83 selfloop flow, removed 4 redundant places. [2024-06-27 21:18:08,842 INFO L231 Difference]: Finished difference. Result has 139 places, 234 transitions, 2650 flow [2024-06-27 21:18:08,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2166, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2650, PETRI_PLACES=139, PETRI_TRANSITIONS=234} [2024-06-27 21:18:08,842 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 84 predicate places. [2024-06-27 21:18:08,842 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 234 transitions, 2650 flow [2024-06-27 21:18:08,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:08,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:08,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:18:08,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 21:18:08,843 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:18:08,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:08,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1483027, now seen corresponding path program 3 times [2024-06-27 21:18:08,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:08,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882563614] [2024-06-27 21:18:08,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:08,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:08,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:12,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:12,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:12,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882563614] [2024-06-27 21:18:12,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882563614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:12,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:12,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:18:12,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299974525] [2024-06-27 21:18:12,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:12,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:18:12,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:12,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:18:12,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:18:12,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 52 [2024-06-27 21:18:12,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 234 transitions, 2650 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:12,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:12,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 52 [2024-06-27 21:18:12,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:18,393 INFO L124 PetriNetUnfolderBase]: 16907/22712 cut-off events. [2024-06-27 21:18:18,393 INFO L125 PetriNetUnfolderBase]: For 426194/426201 co-relation queries the response was YES. [2024-06-27 21:18:18,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135195 conditions, 22712 events. 16907/22712 cut-off events. For 426194/426201 co-relation queries the response was YES. Maximal size of possible extension queue 779. Compared 118028 event pairs, 6159 based on Foata normal form. 54/22763 useless extension candidates. Maximal degree in co-relation 135133. Up to 19827 conditions per place. [2024-06-27 21:18:18,630 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 215 selfloop transitions, 93 changer transitions 0/312 dead transitions. [2024-06-27 21:18:18,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 312 transitions, 3862 flow [2024-06-27 21:18:18,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:18:18,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:18:18,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 238 transitions. [2024-06-27 21:18:18,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160839160839161 [2024-06-27 21:18:18,632 INFO L175 Difference]: Start difference. First operand has 139 places, 234 transitions, 2650 flow. Second operand 11 states and 238 transitions. [2024-06-27 21:18:18,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 312 transitions, 3862 flow [2024-06-27 21:18:19,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 312 transitions, 3739 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-27 21:18:19,639 INFO L231 Difference]: Finished difference. Result has 147 places, 248 transitions, 3028 flow [2024-06-27 21:18:19,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2537, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3028, PETRI_PLACES=147, PETRI_TRANSITIONS=248} [2024-06-27 21:18:19,639 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 92 predicate places. [2024-06-27 21:18:19,639 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 248 transitions, 3028 flow [2024-06-27 21:18:19,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:19,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:19,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:18:19,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 21:18:19,640 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:18:19,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:19,641 INFO L85 PathProgramCache]: Analyzing trace with hash -306377571, now seen corresponding path program 4 times [2024-06-27 21:18:19,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:19,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880693031] [2024-06-27 21:18:19,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:19,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:19,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:23,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:23,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:23,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880693031] [2024-06-27 21:18:23,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880693031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:23,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:23,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:18:23,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461438965] [2024-06-27 21:18:23,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:23,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:18:23,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:23,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:18:23,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:18:23,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 52 [2024-06-27 21:18:23,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 248 transitions, 3028 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:23,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:23,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 52 [2024-06-27 21:18:23,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:29,512 INFO L124 PetriNetUnfolderBase]: 19739/26356 cut-off events. [2024-06-27 21:18:29,512 INFO L125 PetriNetUnfolderBase]: For 538318/538325 co-relation queries the response was YES. [2024-06-27 21:18:29,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161641 conditions, 26356 events. 19739/26356 cut-off events. For 538318/538325 co-relation queries the response was YES. Maximal size of possible extension queue 963. Compared 137691 event pairs, 6470 based on Foata normal form. 54/26407 useless extension candidates. Maximal degree in co-relation 161575. Up to 20517 conditions per place. [2024-06-27 21:18:29,806 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 221 selfloop transitions, 144 changer transitions 0/369 dead transitions. [2024-06-27 21:18:29,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 369 transitions, 4854 flow [2024-06-27 21:18:29,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:18:29,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:18:29,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 258 transitions. [2024-06-27 21:18:29,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45104895104895104 [2024-06-27 21:18:29,808 INFO L175 Difference]: Start difference. First operand has 147 places, 248 transitions, 3028 flow. Second operand 11 states and 258 transitions. [2024-06-27 21:18:29,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 369 transitions, 4854 flow [2024-06-27 21:18:30,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 369 transitions, 4734 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-27 21:18:30,982 INFO L231 Difference]: Finished difference. Result has 155 places, 284 transitions, 3765 flow [2024-06-27 21:18:30,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2908, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3765, PETRI_PLACES=155, PETRI_TRANSITIONS=284} [2024-06-27 21:18:30,982 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 100 predicate places. [2024-06-27 21:18:30,982 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 284 transitions, 3765 flow [2024-06-27 21:18:30,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:30,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:30,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:18:30,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 21:18:30,983 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:18:30,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:30,984 INFO L85 PathProgramCache]: Analyzing trace with hash -584795511, now seen corresponding path program 1 times [2024-06-27 21:18:30,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:30,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182651175] [2024-06-27 21:18:30,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:30,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:31,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:34,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:34,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:34,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182651175] [2024-06-27 21:18:34,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182651175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:34,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:34,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:18:34,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789881244] [2024-06-27 21:18:34,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:34,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:18:34,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:34,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:18:34,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:18:34,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-27 21:18:34,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 284 transitions, 3765 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:34,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:34,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-27 21:18:34,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand