./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.2024-05-21_14-57-05.files/protection/safe016_power.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 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.2024-05-21_14-57-05.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-cde23df-m [2024-06-14 13:16:25,385 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 13:16:25,445 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 13:16:25,453 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 13:16:25,453 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 13:16:25,478 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 13:16:25,479 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 13:16:25,480 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 13:16:25,480 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 13:16:25,485 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 13:16:25,485 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 13:16:25,485 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 13:16:25,486 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 13:16:25,487 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 13:16:25,487 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 13:16:25,487 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 13:16:25,488 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 13:16:25,488 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 13:16:25,488 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 13:16:25,488 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 13:16:25,488 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 13:16:25,489 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 13:16:25,489 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 13:16:25,489 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 13:16:25,489 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 13:16:25,490 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 13:16:25,490 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 13:16:25,490 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 13:16:25,491 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 13:16:25,491 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 13:16:25,492 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 13:16:25,492 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 13:16:25,492 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:16:25,492 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 13:16:25,492 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 13:16:25,493 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 13:16:25,493 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 13:16:25,493 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 13:16:25,493 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 13:16:25,493 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 13:16:25,494 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 13:16:25,494 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 13:16:25,494 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 13:16:25,494 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 13:16:25,696 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 13:16:25,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 13:16:25,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 13:16:25,722 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 13:16:25,722 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 13:16:25,723 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe016_power.opt.i [2024-06-14 13:16:26,852 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 13:16:27,070 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 13:16:27,071 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe016_power.opt.i [2024-06-14 13:16:27,087 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da9da6906/b83dfb403ddd41f68207025a9bb85904/FLAG7eb39d87c [2024-06-14 13:16:27,098 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da9da6906/b83dfb403ddd41f68207025a9bb85904 [2024-06-14 13:16:27,100 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 13:16:27,102 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 13:16:27,102 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe016_power.opt.yml/witness.yml [2024-06-14 13:16:27,333 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 13:16:27,334 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 13:16:27,335 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 13:16:27,335 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 13:16:27,339 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 13:16:27,339 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:16:27" (1/2) ... [2024-06-14 13:16:27,340 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31e93650 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:16:27, skipping insertion in model container [2024-06-14 13:16:27,340 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:16:27" (1/2) ... [2024-06-14 13:16:27,342 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@464c705e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:16:27, skipping insertion in model container [2024-06-14 13:16:27,342 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:16:27" (2/2) ... [2024-06-14 13:16:27,343 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31e93650 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:16:27, skipping insertion in model container [2024-06-14 13:16:27,343 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:16:27" (2/2) ... [2024-06-14 13:16:27,343 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 13:16:27,507 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 13:16:27,508 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$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$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 || (((0 <= x && x <= 2) && x <= 127) && ((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$read_delayed_var == 0 || ((((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 2) && *__unbuffered_p2_EAX$read_delayed_var <= 127) && __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 || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$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$read_delayed == (_Bool)0) [2024-06-14 13:16:27,508 INFO L97 edCorrectnessWitness]: Location invariant before [L868-L868] (((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$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 || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((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$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || __unbuffered_p2_EAX$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 || ((((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 2) && *__unbuffered_p2_EAX$read_delayed_var <= 127) && __unbuffered_p2_EAX$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$w_buff1_used == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__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) [2024-06-14 13:16:27,509 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$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$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 || (((0 <= x && x <= 2) && x <= 127) && ((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$read_delayed_var == 0 || ((((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 2) && *__unbuffered_p2_EAX$read_delayed_var <= 127) && __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 || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$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$read_delayed == (_Bool)0) [2024-06-14 13:16:27,509 INFO L97 edCorrectnessWitness]: Location invariant before [L864-L864] (((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$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 || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((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$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || __unbuffered_p2_EAX$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 || ((((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 2) && *__unbuffered_p2_EAX$read_delayed_var <= 127) && __unbuffered_p2_EAX$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$w_buff1_used == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__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) [2024-06-14 13:16:27,509 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 13:16:27,510 INFO L106 edCorrectnessWitness]: ghost_update [L862-L862] multithreaded = 1; [2024-06-14 13:16:27,548 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 13:16:27,853 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:16:27,879 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 13:16:28,032 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:16:28,083 INFO L206 MainTranslator]: Completed translation [2024-06-14 13:16:28,084 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:16:28 WrapperNode [2024-06-14 13:16:28,084 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 13:16:28,085 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 13:16:28,085 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 13:16:28,085 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 13:16:28,090 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 14.06 01:16:28" (1/1) ... [2024-06-14 13:16:28,107 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 14.06 01:16:28" (1/1) ... [2024-06-14 13:16:28,141 INFO L138 Inliner]: procedures = 176, calls = 124, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 327 [2024-06-14 13:16:28,141 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 13:16:28,145 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 13:16:28,145 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 13:16:28,145 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 13:16:28,155 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:16:28" (1/1) ... [2024-06-14 13:16:28,156 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:16:28" (1/1) ... [2024-06-14 13:16:28,165 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:16:28" (1/1) ... [2024-06-14 13:16:28,192 INFO L175 MemorySlicer]: Split 78 memory accesses to 2 slices as follows [2, 76]. 97 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]. [2024-06-14 13:16:28,198 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:16:28" (1/1) ... [2024-06-14 13:16:28,198 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:16:28" (1/1) ... [2024-06-14 13:16:28,212 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:16:28" (1/1) ... [2024-06-14 13:16:28,214 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:16:28" (1/1) ... [2024-06-14 13:16:28,216 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:16:28" (1/1) ... [2024-06-14 13:16:28,218 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:16:28" (1/1) ... [2024-06-14 13:16:28,238 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 13:16:28,239 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 13:16:28,239 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 13:16:28,239 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 13:16:28,240 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:16:28" (1/1) ... [2024-06-14 13:16:28,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:16:28,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 13:16:28,301 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) [2024-06-14 13:16:28,337 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 [2024-06-14 13:16:28,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-14 13:16:28,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-14 13:16:28,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-14 13:16:28,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-14 13:16:28,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 13:16:28,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 13:16:28,360 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 13:16:28,360 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 13:16:28,360 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 13:16:28,361 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 13:16:28,361 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 13:16:28,361 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 13:16:28,362 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-14 13:16:28,362 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-14 13:16:28,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 13:16:28,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-14 13:16:28,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 13:16:28,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 13:16:28,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 13:16:28,366 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 13:16:28,493 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 13:16:28,494 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 13:16:29,114 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 13:16:29,115 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 13:16:29,642 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 13:16:29,642 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 13:16:29,643 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:16:29 BoogieIcfgContainer [2024-06-14 13:16:29,643 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 13:16:29,645 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 13:16:29,645 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 13:16:29,648 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 13:16:29,648 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 01:16:27" (1/4) ... [2024-06-14 13:16:29,648 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c74fa27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:16:29, skipping insertion in model container [2024-06-14 13:16:29,649 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:16:27" (2/4) ... [2024-06-14 13:16:29,649 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c74fa27 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:16:29, skipping insertion in model container [2024-06-14 13:16:29,649 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:16:28" (3/4) ... [2024-06-14 13:16:29,649 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c74fa27 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:16:29, skipping insertion in model container [2024-06-14 13:16:29,650 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:16:29" (4/4) ... [2024-06-14 13:16:29,650 INFO L112 eAbstractionObserver]: Analyzing ICFG safe016_power.opt.i [2024-06-14 13:16:29,664 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 13:16:29,665 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-14 13:16:29,665 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 13:16:29,739 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 13:16:29,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-14 13:16:29,805 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-14 13:16:29,806 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:16:29,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 0/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 74 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 13:16:29,808 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-14 13:16:29,811 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-14 13:16:29,821 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 13:16:29,827 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;@5154b6cb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 13:16:29,827 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-14 13:16:29,832 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 13:16:29,832 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 13:16:29,833 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:16:29,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:29,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 13:16:29,834 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)] === [2024-06-14 13:16:29,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:29,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1060958078, now seen corresponding path program 1 times [2024-06-14 13:16:29,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:29,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683823143] [2024-06-14 13:16:29,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:29,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:29,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:32,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:32,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:32,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683823143] [2024-06-14 13:16:32,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683823143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:32,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:32,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 13:16:32,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029261478] [2024-06-14 13:16:32,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:32,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 13:16:32,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:32,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 13:16:32,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 13:16:32,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:16:32,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:32,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:32,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:16:32,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:34,790 INFO L124 PetriNetUnfolderBase]: 8561/11715 cut-off events. [2024-06-14 13:16:34,791 INFO L125 PetriNetUnfolderBase]: For 177/177 co-relation queries the response was YES. [2024-06-14 13:16:34,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23793 conditions, 11715 events. 8561/11715 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 60088 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. [2024-06-14 13:16:34,847 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 50 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2024-06-14 13:16:34,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 60 transitions, 251 flow [2024-06-14 13:16:34,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 13:16:34,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 13:16:34,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2024-06-14 13:16:34,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5408805031446541 [2024-06-14 13:16:34,859 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 86 transitions. [2024-06-14 13:16:34,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 60 transitions, 251 flow [2024-06-14 13:16:34,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 60 transitions, 244 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 13:16:34,867 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-14 13:16:34,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-14 13:16:34,871 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-14 13:16:34,871 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-14 13:16:34,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:34,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:34,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:34,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 13:16:34,873 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)] === [2024-06-14 13:16:34,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:34,874 INFO L85 PathProgramCache]: Analyzing trace with hash -336264023, now seen corresponding path program 1 times [2024-06-14 13:16:34,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:34,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228626482] [2024-06-14 13:16:34,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:34,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:34,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:37,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:37,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:37,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228626482] [2024-06-14 13:16:37,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228626482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:37,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:37,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:16:37,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634683571] [2024-06-14 13:16:37,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:37,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:16:37,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:37,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:16:37,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:16:37,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 53 [2024-06-14 13:16:37,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:37,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:37,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 53 [2024-06-14 13:16:37,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:40,097 INFO L124 PetriNetUnfolderBase]: 10503/14345 cut-off events. [2024-06-14 13:16:40,098 INFO L125 PetriNetUnfolderBase]: For 2656/2676 co-relation queries the response was YES. [2024-06-14 13:16:40,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32808 conditions, 14345 events. 10503/14345 cut-off events. For 2656/2676 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 72788 event pairs, 4227 based on Foata normal form. 26/14358 useless extension candidates. Maximal degree in co-relation 32793. Up to 13871 conditions per place. [2024-06-14 13:16:40,152 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 73 selfloop transitions, 14 changer transitions 0/91 dead transitions. [2024-06-14 13:16:40,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 91 transitions, 425 flow [2024-06-14 13:16:40,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:16:40,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:16:40,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-06-14 13:16:40,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5660377358490566 [2024-06-14 13:16:40,154 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 120 transitions. [2024-06-14 13:16:40,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 91 transitions, 425 flow [2024-06-14 13:16:40,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 91 transitions, 420 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 13:16:40,160 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 225 flow [2024-06-14 13:16:40,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=225, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2024-06-14 13:16:40,161 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2024-06-14 13:16:40,161 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 225 flow [2024-06-14 13:16:40,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:40,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:40,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:40,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 13:16:40,162 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)] === [2024-06-14 13:16:40,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:40,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1944981050, now seen corresponding path program 1 times [2024-06-14 13:16:40,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:40,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791951506] [2024-06-14 13:16:40,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:40,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:40,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:43,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:43,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:43,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791951506] [2024-06-14 13:16:43,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791951506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:43,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:43,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:16:43,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959483124] [2024-06-14 13:16:43,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:43,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:16:43,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:43,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:16:43,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:16:43,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 53 [2024-06-14 13:16:43,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 225 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:43,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:43,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 53 [2024-06-14 13:16:43,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:46,497 INFO L124 PetriNetUnfolderBase]: 10779/14769 cut-off events. [2024-06-14 13:16:46,497 INFO L125 PetriNetUnfolderBase]: For 9978/10053 co-relation queries the response was YES. [2024-06-14 13:16:46,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39345 conditions, 14769 events. 10779/14769 cut-off events. For 9978/10053 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 75581 event pairs, 3371 based on Foata normal form. 84/14840 useless extension candidates. Maximal degree in co-relation 39327. Up to 13873 conditions per place. [2024-06-14 13:16:46,566 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 87 selfloop transitions, 17 changer transitions 0/108 dead transitions. [2024-06-14 13:16:46,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 108 transitions, 575 flow [2024-06-14 13:16:46,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:16:46,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:16:46,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 145 transitions. [2024-06-14 13:16:46,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5471698113207547 [2024-06-14 13:16:46,569 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 225 flow. Second operand 5 states and 145 transitions. [2024-06-14 13:16:46,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 108 transitions, 575 flow [2024-06-14 13:16:46,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 108 transitions, 569 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-14 13:16:46,573 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 282 flow [2024-06-14 13:16:46,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=282, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2024-06-14 13:16:46,574 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 7 predicate places. [2024-06-14 13:16:46,574 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 282 flow [2024-06-14 13:16:46,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:46,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:46,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:46,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 13:16:46,575 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)] === [2024-06-14 13:16:46,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:46,575 INFO L85 PathProgramCache]: Analyzing trace with hash -289278817, now seen corresponding path program 1 times [2024-06-14 13:16:46,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:46,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424370625] [2024-06-14 13:16:46,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:46,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:46,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:48,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:48,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:48,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424370625] [2024-06-14 13:16:48,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424370625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:48,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:48,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:16:48,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134517957] [2024-06-14 13:16:48,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:48,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:16:48,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:48,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:16:48,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:16:48,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:16:48,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 282 flow. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:48,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:48,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:16:48,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:51,450 INFO L124 PetriNetUnfolderBase]: 8823/12116 cut-off events. [2024-06-14 13:16:51,450 INFO L125 PetriNetUnfolderBase]: For 14162/14204 co-relation queries the response was YES. [2024-06-14 13:16:51,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35292 conditions, 12116 events. 8823/12116 cut-off events. For 14162/14204 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 62273 event pairs, 3908 based on Foata normal form. 46/12149 useless extension candidates. Maximal degree in co-relation 35271. Up to 11798 conditions per place. [2024-06-14 13:16:51,496 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 65 selfloop transitions, 15 changer transitions 0/85 dead transitions. [2024-06-14 13:16:51,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 85 transitions, 504 flow [2024-06-14 13:16:51,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:16:51,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:16:51,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-14 13:16:51,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46037735849056605 [2024-06-14 13:16:51,498 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 282 flow. Second operand 5 states and 122 transitions. [2024-06-14 13:16:51,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 85 transitions, 504 flow [2024-06-14 13:16:51,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 85 transitions, 467 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 13:16:51,504 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 288 flow [2024-06-14 13:16:51,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=288, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2024-06-14 13:16:51,505 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 9 predicate places. [2024-06-14 13:16:51,505 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 288 flow [2024-06-14 13:16:51,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:51,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:51,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:51,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 13:16:51,506 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)] === [2024-06-14 13:16:51,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:51,506 INFO L85 PathProgramCache]: Analyzing trace with hash 603134492, now seen corresponding path program 1 times [2024-06-14 13:16:51,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:51,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495650114] [2024-06-14 13:16:51,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:51,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:51,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:54,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:54,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:54,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495650114] [2024-06-14 13:16:54,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495650114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:54,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:54,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:16:54,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884129582] [2024-06-14 13:16:54,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:54,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:16:54,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:54,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:16:54,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:16:54,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:16:54,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 288 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:54,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:54,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:16:54,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:57,208 INFO L124 PetriNetUnfolderBase]: 9052/12459 cut-off events. [2024-06-14 13:16:57,209 INFO L125 PetriNetUnfolderBase]: For 17802/17844 co-relation queries the response was YES. [2024-06-14 13:16:57,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37078 conditions, 12459 events. 9052/12459 cut-off events. For 17802/17844 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 64591 event pairs, 3505 based on Foata normal form. 70/12516 useless extension candidates. Maximal degree in co-relation 37055. Up to 11795 conditions per place. [2024-06-14 13:16:57,298 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 80 selfloop transitions, 18 changer transitions 0/103 dead transitions. [2024-06-14 13:16:57,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 103 transitions, 606 flow [2024-06-14 13:16:57,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:16:57,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:16:57,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 13:16:57,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46855345911949686 [2024-06-14 13:16:57,312 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 288 flow. Second operand 6 states and 149 transitions. [2024-06-14 13:16:57,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 103 transitions, 606 flow [2024-06-14 13:16:57,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 103 transitions, 577 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 13:16:57,326 INFO L231 Difference]: Finished difference. Result has 68 places, 62 transitions, 334 flow [2024-06-14 13:16:57,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=334, PETRI_PLACES=68, PETRI_TRANSITIONS=62} [2024-06-14 13:16:57,329 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 12 predicate places. [2024-06-14 13:16:57,329 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 62 transitions, 334 flow [2024-06-14 13:16:57,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:57,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:57,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:57,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 13:16:57,330 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)] === [2024-06-14 13:16:57,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:57,331 INFO L85 PathProgramCache]: Analyzing trace with hash 701882258, now seen corresponding path program 1 times [2024-06-14 13:16:57,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:57,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782864433] [2024-06-14 13:16:57,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:57,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:57,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:59,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:59,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:59,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782864433] [2024-06-14 13:16:59,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782864433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:59,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:59,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:16:59,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043559020] [2024-06-14 13:16:59,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:59,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:16:59,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:59,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:16:59,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:16:59,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:16:59,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 62 transitions, 334 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:59,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:59,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:16:59,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:02,580 INFO L124 PetriNetUnfolderBase]: 9045/12437 cut-off events. [2024-06-14 13:17:02,581 INFO L125 PetriNetUnfolderBase]: For 24239/24239 co-relation queries the response was YES. [2024-06-14 13:17:02,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39501 conditions, 12437 events. 9045/12437 cut-off events. For 24239/24239 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 64076 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. [2024-06-14 13:17:02,634 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 69 selfloop transitions, 10 changer transitions 0/84 dead transitions. [2024-06-14 13:17:02,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 84 transitions, 564 flow [2024-06-14 13:17:02,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:17:02,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:17:02,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-06-14 13:17:02,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41509433962264153 [2024-06-14 13:17:02,636 INFO L175 Difference]: Start difference. First operand has 68 places, 62 transitions, 334 flow. Second operand 5 states and 110 transitions. [2024-06-14 13:17:02,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 84 transitions, 564 flow [2024-06-14 13:17:02,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 84 transitions, 521 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 13:17:02,652 INFO L231 Difference]: Finished difference. Result has 69 places, 66 transitions, 356 flow [2024-06-14 13:17:02,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=356, PETRI_PLACES=69, PETRI_TRANSITIONS=66} [2024-06-14 13:17:02,652 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2024-06-14 13:17:02,653 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 66 transitions, 356 flow [2024-06-14 13:17:02,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:02,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:02,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:02,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 13:17:02,653 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)] === [2024-06-14 13:17:02,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:02,654 INFO L85 PathProgramCache]: Analyzing trace with hash -940351791, now seen corresponding path program 1 times [2024-06-14 13:17:02,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:02,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524989685] [2024-06-14 13:17:02,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:02,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:02,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:06,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:06,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:06,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524989685] [2024-06-14 13:17:06,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524989685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:06,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:06,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:17:06,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436077302] [2024-06-14 13:17:06,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:06,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:17:06,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:06,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:17:06,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:17:06,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 53 [2024-06-14 13:17:06,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 66 transitions, 356 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:06,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:06,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 53 [2024-06-14 13:17:06,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:09,275 INFO L124 PetriNetUnfolderBase]: 10873/14932 cut-off events. [2024-06-14 13:17:09,276 INFO L125 PetriNetUnfolderBase]: For 38184/38275 co-relation queries the response was YES. [2024-06-14 13:17:09,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49371 conditions, 14932 events. 10873/14932 cut-off events. For 38184/38275 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 76898 event pairs, 2633 based on Foata normal form. 81/14994 useless extension candidates. Maximal degree in co-relation 49346. Up to 13311 conditions per place. [2024-06-14 13:17:09,382 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 88 selfloop transitions, 21 changer transitions 0/113 dead transitions. [2024-06-14 13:17:09,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 113 transitions, 746 flow [2024-06-14 13:17:09,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:17:09,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:17:09,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-14 13:17:09,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528301886792453 [2024-06-14 13:17:09,385 INFO L175 Difference]: Start difference. First operand has 69 places, 66 transitions, 356 flow. Second operand 6 states and 144 transitions. [2024-06-14 13:17:09,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 113 transitions, 746 flow [2024-06-14 13:17:09,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 113 transitions, 701 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 13:17:09,400 INFO L231 Difference]: Finished difference. Result has 71 places, 70 transitions, 410 flow [2024-06-14 13:17:09,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=410, PETRI_PLACES=71, PETRI_TRANSITIONS=70} [2024-06-14 13:17:09,401 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-06-14 13:17:09,401 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 70 transitions, 410 flow [2024-06-14 13:17:09,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:09,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:09,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:09,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 13:17:09,402 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)] === [2024-06-14 13:17:09,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:09,402 INFO L85 PathProgramCache]: Analyzing trace with hash -634943375, now seen corresponding path program 1 times [2024-06-14 13:17:09,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:09,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021805638] [2024-06-14 13:17:09,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:09,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:09,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:11,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:11,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:11,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021805638] [2024-06-14 13:17:11,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021805638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:11,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:11,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:17:11,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163830390] [2024-06-14 13:17:11,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:11,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:17:11,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:11,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:17:11,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:17:12,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 53 [2024-06-14 13:17:12,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 410 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:12,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:12,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 53 [2024-06-14 13:17:12,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:14,947 INFO L124 PetriNetUnfolderBase]: 10819/14854 cut-off events. [2024-06-14 13:17:14,948 INFO L125 PetriNetUnfolderBase]: For 48478/48573 co-relation queries the response was YES. [2024-06-14 13:17:14,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51321 conditions, 14854 events. 10819/14854 cut-off events. For 48478/48573 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 75976 event pairs, 2603 based on Foata normal form. 81/14916 useless extension candidates. Maximal degree in co-relation 51296. Up to 13287 conditions per place. [2024-06-14 13:17:15,022 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 85 selfloop transitions, 21 changer transitions 0/110 dead transitions. [2024-06-14 13:17:15,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 110 transitions, 708 flow [2024-06-14 13:17:15,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:17:15,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:17:15,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-14 13:17:15,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44339622641509435 [2024-06-14 13:17:15,025 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 410 flow. Second operand 6 states and 141 transitions. [2024-06-14 13:17:15,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 110 transitions, 708 flow [2024-06-14 13:17:15,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 110 transitions, 675 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-14 13:17:15,062 INFO L231 Difference]: Finished difference. Result has 74 places, 69 transitions, 412 flow [2024-06-14 13:17:15,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=412, PETRI_PLACES=74, PETRI_TRANSITIONS=69} [2024-06-14 13:17:15,063 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 18 predicate places. [2024-06-14 13:17:15,063 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 69 transitions, 412 flow [2024-06-14 13:17:15,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:15,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:15,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:15,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 13:17:15,064 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)] === [2024-06-14 13:17:15,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:15,064 INFO L85 PathProgramCache]: Analyzing trace with hash 283516007, now seen corresponding path program 1 times [2024-06-14 13:17:15,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:15,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524629711] [2024-06-14 13:17:15,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:15,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:15,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:18,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:18,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:18,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524629711] [2024-06-14 13:17:18,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524629711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:18,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:18,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:17:18,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619514310] [2024-06-14 13:17:18,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:18,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:17:18,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:18,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:17:18,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:17:18,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 53 [2024-06-14 13:17:18,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 69 transitions, 412 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:18,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:18,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 53 [2024-06-14 13:17:18,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:21,096 INFO L124 PetriNetUnfolderBase]: 10845/14860 cut-off events. [2024-06-14 13:17:21,097 INFO L125 PetriNetUnfolderBase]: For 54762/54762 co-relation queries the response was YES. [2024-06-14 13:17:21,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52773 conditions, 14860 events. 10845/14860 cut-off events. For 54762/54762 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 76100 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. [2024-06-14 13:17:21,161 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 95 selfloop transitions, 20 changer transitions 0/119 dead transitions. [2024-06-14 13:17:21,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 119 transitions, 858 flow [2024-06-14 13:17:21,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:17:21,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:17:21,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-14 13:17:21,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41823899371069184 [2024-06-14 13:17:21,163 INFO L175 Difference]: Start difference. First operand has 74 places, 69 transitions, 412 flow. Second operand 6 states and 133 transitions. [2024-06-14 13:17:21,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 119 transitions, 858 flow [2024-06-14 13:17:21,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 119 transitions, 796 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 13:17:21,221 INFO L231 Difference]: Finished difference. Result has 77 places, 87 transitions, 543 flow [2024-06-14 13:17:21,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=543, PETRI_PLACES=77, PETRI_TRANSITIONS=87} [2024-06-14 13:17:21,221 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 21 predicate places. [2024-06-14 13:17:21,222 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 87 transitions, 543 flow [2024-06-14 13:17:21,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:21,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:21,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:21,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 13:17:21,222 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)] === [2024-06-14 13:17:21,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:21,223 INFO L85 PathProgramCache]: Analyzing trace with hash 194295601, now seen corresponding path program 1 times [2024-06-14 13:17:21,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:21,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185184447] [2024-06-14 13:17:21,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:21,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:21,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:23,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:23,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:23,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185184447] [2024-06-14 13:17:23,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185184447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:23,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:23,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:17:23,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553657374] [2024-06-14 13:17:23,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:23,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:17:23,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:23,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:17:23,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:17:23,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:17:23,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 87 transitions, 543 flow. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:23,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:23,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:17:23,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:27,297 INFO L124 PetriNetUnfolderBase]: 10624/14721 cut-off events. [2024-06-14 13:17:27,297 INFO L125 PetriNetUnfolderBase]: For 70573/70602 co-relation queries the response was YES. [2024-06-14 13:17:27,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56575 conditions, 14721 events. 10624/14721 cut-off events. For 70573/70602 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 76453 event pairs, 4081 based on Foata normal form. 36/14742 useless extension candidates. Maximal degree in co-relation 56545. Up to 13770 conditions per place. [2024-06-14 13:17:27,365 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 97 selfloop transitions, 34 changer transitions 0/139 dead transitions. [2024-06-14 13:17:27,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 139 transitions, 1085 flow [2024-06-14 13:17:27,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:17:27,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:17:27,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 13:17:27,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2024-06-14 13:17:27,367 INFO L175 Difference]: Start difference. First operand has 77 places, 87 transitions, 543 flow. Second operand 6 states and 147 transitions. [2024-06-14 13:17:27,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 139 transitions, 1085 flow [2024-06-14 13:17:27,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 139 transitions, 1063 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-14 13:17:27,447 INFO L231 Difference]: Finished difference. Result has 83 places, 102 transitions, 754 flow [2024-06-14 13:17:27,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=754, PETRI_PLACES=83, PETRI_TRANSITIONS=102} [2024-06-14 13:17:27,448 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 27 predicate places. [2024-06-14 13:17:27,448 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 102 transitions, 754 flow [2024-06-14 13:17:27,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:27,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:27,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:27,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 13:17:27,449 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)] === [2024-06-14 13:17:27,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:27,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1086531091, now seen corresponding path program 2 times [2024-06-14 13:17:27,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:27,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153061164] [2024-06-14 13:17:27,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:27,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:27,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:30,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:30,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:30,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153061164] [2024-06-14 13:17:30,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153061164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:30,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:30,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:17:30,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117932697] [2024-06-14 13:17:30,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:30,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:17:30,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:30,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:17:30,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:17:30,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:17:30,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 102 transitions, 754 flow. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:30,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:30,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:17:30,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:33,323 INFO L124 PetriNetUnfolderBase]: 10857/15005 cut-off events. [2024-06-14 13:17:33,324 INFO L125 PetriNetUnfolderBase]: For 91718/91718 co-relation queries the response was YES. [2024-06-14 13:17:33,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63263 conditions, 15005 events. 10857/15005 cut-off events. For 91718/91718 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 77758 event pairs, 5137 based on Foata normal form. 16/15015 useless extension candidates. Maximal degree in co-relation 63229. Up to 14588 conditions per place. [2024-06-14 13:17:33,429 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 113 selfloop transitions, 24 changer transitions 0/145 dead transitions. [2024-06-14 13:17:33,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 145 transitions, 1243 flow [2024-06-14 13:17:33,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:17:33,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:17:33,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-14 13:17:33,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4123989218328841 [2024-06-14 13:17:33,432 INFO L175 Difference]: Start difference. First operand has 83 places, 102 transitions, 754 flow. Second operand 7 states and 153 transitions. [2024-06-14 13:17:33,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 145 transitions, 1243 flow [2024-06-14 13:17:33,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 145 transitions, 1205 flow, removed 18 selfloop flow, removed 1 redundant places. [2024-06-14 13:17:33,611 INFO L231 Difference]: Finished difference. Result has 90 places, 111 transitions, 896 flow [2024-06-14 13:17:33,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=718, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=896, PETRI_PLACES=90, PETRI_TRANSITIONS=111} [2024-06-14 13:17:33,611 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 34 predicate places. [2024-06-14 13:17:33,612 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 111 transitions, 896 flow [2024-06-14 13:17:33,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:33,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:33,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:33,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 13:17:33,612 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)] === [2024-06-14 13:17:33,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:33,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1550613681, now seen corresponding path program 1 times [2024-06-14 13:17:33,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:33,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527402721] [2024-06-14 13:17:33,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:33,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:33,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:36,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:36,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:36,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527402721] [2024-06-14 13:17:36,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527402721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:36,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:36,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:17:36,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148730260] [2024-06-14 13:17:36,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:36,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:17:36,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:36,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:17:36,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:17:36,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 53 [2024-06-14 13:17:36,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 111 transitions, 896 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:36,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:36,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 53 [2024-06-14 13:17:36,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:40,046 INFO L124 PetriNetUnfolderBase]: 11387/15609 cut-off events. [2024-06-14 13:17:40,051 INFO L125 PetriNetUnfolderBase]: For 102556/102646 co-relation queries the response was YES. [2024-06-14 13:17:40,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66229 conditions, 15609 events. 11387/15609 cut-off events. For 102556/102646 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 80246 event pairs, 4211 based on Foata normal form. 81/15676 useless extension candidates. Maximal degree in co-relation 66191. Up to 14557 conditions per place. [2024-06-14 13:17:40,153 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 110 selfloop transitions, 45 changer transitions 0/159 dead transitions. [2024-06-14 13:17:40,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 159 transitions, 1454 flow [2024-06-14 13:17:40,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:17:40,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:17:40,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 13:17:40,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2024-06-14 13:17:40,155 INFO L175 Difference]: Start difference. First operand has 90 places, 111 transitions, 896 flow. Second operand 6 states and 147 transitions. [2024-06-14 13:17:40,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 159 transitions, 1454 flow [2024-06-14 13:17:40,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 159 transitions, 1370 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 13:17:40,333 INFO L231 Difference]: Finished difference. Result has 91 places, 115 transitions, 962 flow [2024-06-14 13:17:40,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=812, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=962, PETRI_PLACES=91, PETRI_TRANSITIONS=115} [2024-06-14 13:17:40,334 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 35 predicate places. [2024-06-14 13:17:40,334 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 115 transitions, 962 flow [2024-06-14 13:17:40,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:40,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:40,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:40,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 13:17:40,334 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)] === [2024-06-14 13:17:40,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:40,335 INFO L85 PathProgramCache]: Analyzing trace with hash -612639345, now seen corresponding path program 2 times [2024-06-14 13:17:40,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:40,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097411876] [2024-06-14 13:17:40,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:40,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:40,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:43,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:43,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:43,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097411876] [2024-06-14 13:17:43,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097411876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:43,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:43,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:17:43,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864242099] [2024-06-14 13:17:43,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:43,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:17:43,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:43,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:17:43,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:17:43,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 53 [2024-06-14 13:17:43,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 115 transitions, 962 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:43,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:43,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 53 [2024-06-14 13:17:43,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:46,399 INFO L124 PetriNetUnfolderBase]: 11325/15495 cut-off events. [2024-06-14 13:17:46,399 INFO L125 PetriNetUnfolderBase]: For 111649/111657 co-relation queries the response was YES. [2024-06-14 13:17:46,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66721 conditions, 15495 events. 11325/15495 cut-off events. For 111649/111657 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 79134 event pairs, 5169 based on Foata normal form. 18/15508 useless extension candidates. Maximal degree in co-relation 66683. Up to 15227 conditions per place. [2024-06-14 13:17:46,492 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 122 selfloop transitions, 24 changer transitions 0/150 dead transitions. [2024-06-14 13:17:46,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 150 transitions, 1344 flow [2024-06-14 13:17:46,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:17:46,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:17:46,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-14 13:17:46,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39892183288409705 [2024-06-14 13:17:46,495 INFO L175 Difference]: Start difference. First operand has 91 places, 115 transitions, 962 flow. Second operand 7 states and 148 transitions. [2024-06-14 13:17:46,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 150 transitions, 1344 flow [2024-06-14 13:17:46,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 150 transitions, 1185 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-14 13:17:46,715 INFO L231 Difference]: Finished difference. Result has 94 places, 115 transitions, 862 flow [2024-06-14 13:17:46,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=862, PETRI_PLACES=94, PETRI_TRANSITIONS=115} [2024-06-14 13:17:46,716 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 38 predicate places. [2024-06-14 13:17:46,716 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 115 transitions, 862 flow [2024-06-14 13:17:46,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:46,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:46,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:46,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 13:17:46,716 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)] === [2024-06-14 13:17:46,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:46,717 INFO L85 PathProgramCache]: Analyzing trace with hash -641267194, now seen corresponding path program 1 times [2024-06-14 13:17:46,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:46,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460173841] [2024-06-14 13:17:46,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:46,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:46,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:49,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:49,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:49,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460173841] [2024-06-14 13:17:49,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460173841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:49,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:49,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:17:49,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96692357] [2024-06-14 13:17:49,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:49,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:17:49,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:49,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:17:49,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:17:49,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 53 [2024-06-14 13:17:49,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 115 transitions, 862 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:49,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:49,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 53 [2024-06-14 13:17:49,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:53,795 INFO L124 PetriNetUnfolderBase]: 11491/15709 cut-off events. [2024-06-14 13:17:53,796 INFO L125 PetriNetUnfolderBase]: For 122728/122736 co-relation queries the response was YES. [2024-06-14 13:17:53,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67973 conditions, 15709 events. 11491/15709 cut-off events. For 122728/122736 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 80627 event pairs, 5140 based on Foata normal form. 14/15718 useless extension candidates. Maximal degree in co-relation 67935. Up to 15447 conditions per place. [2024-06-14 13:17:53,886 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 117 selfloop transitions, 42 changer transitions 0/163 dead transitions. [2024-06-14 13:17:53,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 163 transitions, 1448 flow [2024-06-14 13:17:53,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:17:53,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:17:53,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-14 13:17:53,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38207547169811323 [2024-06-14 13:17:53,888 INFO L175 Difference]: Start difference. First operand has 94 places, 115 transitions, 862 flow. Second operand 8 states and 162 transitions. [2024-06-14 13:17:53,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 163 transitions, 1448 flow [2024-06-14 13:17:54,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 163 transitions, 1400 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 13:17:54,064 INFO L231 Difference]: Finished difference. Result has 98 places, 131 transitions, 1100 flow [2024-06-14 13:17:54,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1100, PETRI_PLACES=98, PETRI_TRANSITIONS=131} [2024-06-14 13:17:54,065 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 42 predicate places. [2024-06-14 13:17:54,065 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 131 transitions, 1100 flow [2024-06-14 13:17:54,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:54,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:54,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:54,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 13:17:54,066 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)] === [2024-06-14 13:17:54,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:54,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1876009862, now seen corresponding path program 2 times [2024-06-14 13:17:54,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:54,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428437265] [2024-06-14 13:17:54,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:54,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:54,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:57,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:57,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:57,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428437265] [2024-06-14 13:17:57,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428437265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:57,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:57,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:17:57,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484837052] [2024-06-14 13:17:57,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:57,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:17:57,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:57,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:17:57,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:17:57,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 53 [2024-06-14 13:17:57,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 131 transitions, 1100 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:57,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:57,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 53 [2024-06-14 13:17:57,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:01,226 INFO L124 PetriNetUnfolderBase]: 11561/15799 cut-off events. [2024-06-14 13:18:01,226 INFO L125 PetriNetUnfolderBase]: For 147285/147293 co-relation queries the response was YES. [2024-06-14 13:18:01,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73358 conditions, 15799 events. 11561/15799 cut-off events. For 147285/147293 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 81013 event pairs, 5153 based on Foata normal form. 14/15808 useless extension candidates. Maximal degree in co-relation 73317. Up to 15387 conditions per place. [2024-06-14 13:18:01,320 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 127 selfloop transitions, 56 changer transitions 0/187 dead transitions. [2024-06-14 13:18:01,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 187 transitions, 1838 flow [2024-06-14 13:18:01,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:18:01,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:18:01,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-14 13:18:01,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42318059299191374 [2024-06-14 13:18:01,322 INFO L175 Difference]: Start difference. First operand has 98 places, 131 transitions, 1100 flow. Second operand 7 states and 157 transitions. [2024-06-14 13:18:01,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 187 transitions, 1838 flow [2024-06-14 13:18:01,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 187 transitions, 1771 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-14 13:18:01,552 INFO L231 Difference]: Finished difference. Result has 104 places, 149 transitions, 1413 flow [2024-06-14 13:18:01,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1033, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1413, PETRI_PLACES=104, PETRI_TRANSITIONS=149} [2024-06-14 13:18:01,554 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 48 predicate places. [2024-06-14 13:18:01,554 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 149 transitions, 1413 flow [2024-06-14 13:18:01,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:01,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:01,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:01,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 13:18:01,555 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)] === [2024-06-14 13:18:01,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:01,555 INFO L85 PathProgramCache]: Analyzing trace with hash -849012368, now seen corresponding path program 1 times [2024-06-14 13:18:01,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:01,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617287025] [2024-06-14 13:18:01,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:01,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:01,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:04,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:04,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:04,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617287025] [2024-06-14 13:18:04,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617287025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:04,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:04,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:18:04,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798847581] [2024-06-14 13:18:04,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:04,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:18:04,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:04,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:18:04,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:18:04,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 53 [2024-06-14 13:18:04,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 149 transitions, 1413 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:04,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:04,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 53 [2024-06-14 13:18:04,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:08,535 INFO L124 PetriNetUnfolderBase]: 11849/16170 cut-off events. [2024-06-14 13:18:08,535 INFO L125 PetriNetUnfolderBase]: For 178718/178718 co-relation queries the response was YES. [2024-06-14 13:18:08,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79755 conditions, 16170 events. 11849/16170 cut-off events. For 178718/178718 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 82788 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. [2024-06-14 13:18:08,637 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 183 selfloop transitions, 37 changer transitions 0/224 dead transitions. [2024-06-14 13:18:08,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 224 transitions, 2322 flow [2024-06-14 13:18:08,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:18:08,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:18:08,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 13:18:08,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4501347708894879 [2024-06-14 13:18:08,640 INFO L175 Difference]: Start difference. First operand has 104 places, 149 transitions, 1413 flow. Second operand 7 states and 167 transitions. [2024-06-14 13:18:08,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 224 transitions, 2322 flow [2024-06-14 13:18:08,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 224 transitions, 2226 flow, removed 47 selfloop flow, removed 1 redundant places. [2024-06-14 13:18:08,873 INFO L231 Difference]: Finished difference. Result has 112 places, 169 transitions, 1617 flow [2024-06-14 13:18:08,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1341, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1617, PETRI_PLACES=112, PETRI_TRANSITIONS=169} [2024-06-14 13:18:08,874 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 56 predicate places. [2024-06-14 13:18:08,874 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 169 transitions, 1617 flow [2024-06-14 13:18:08,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:08,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:08,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:08,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 13:18:08,875 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)] === [2024-06-14 13:18:08,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:08,875 INFO L85 PathProgramCache]: Analyzing trace with hash -654035078, now seen corresponding path program 2 times [2024-06-14 13:18:08,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:08,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706733212] [2024-06-14 13:18:08,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:08,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:08,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:11,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:11,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:11,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706733212] [2024-06-14 13:18:11,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706733212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:11,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:11,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:18:11,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386521706] [2024-06-14 13:18:11,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:11,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:18:11,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:11,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:18:11,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:18:11,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 53 [2024-06-14 13:18:11,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 169 transitions, 1617 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:11,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:11,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 53 [2024-06-14 13:18:11,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:15,367 INFO L124 PetriNetUnfolderBase]: 12005/16372 cut-off events. [2024-06-14 13:18:15,368 INFO L125 PetriNetUnfolderBase]: For 190183/190183 co-relation queries the response was YES. [2024-06-14 13:18:15,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82016 conditions, 16372 events. 12005/16372 cut-off events. For 190183/190183 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 83717 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. [2024-06-14 13:18:15,477 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 189 selfloop transitions, 31 changer transitions 0/224 dead transitions. [2024-06-14 13:18:15,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 224 transitions, 2426 flow [2024-06-14 13:18:15,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:18:15,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:18:15,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-14 13:18:15,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42587601078167114 [2024-06-14 13:18:15,479 INFO L175 Difference]: Start difference. First operand has 112 places, 169 transitions, 1617 flow. Second operand 7 states and 158 transitions. [2024-06-14 13:18:15,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 224 transitions, 2426 flow [2024-06-14 13:18:15,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 224 transitions, 2332 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-14 13:18:15,757 INFO L231 Difference]: Finished difference. Result has 118 places, 179 transitions, 1718 flow [2024-06-14 13:18:15,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1539, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1718, PETRI_PLACES=118, PETRI_TRANSITIONS=179} [2024-06-14 13:18:15,763 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 62 predicate places. [2024-06-14 13:18:15,764 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 179 transitions, 1718 flow [2024-06-14 13:18:15,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:15,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:15,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:15,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 13:18:15,764 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)] === [2024-06-14 13:18:15,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:15,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1876015814, now seen corresponding path program 3 times [2024-06-14 13:18:15,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:15,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349634231] [2024-06-14 13:18:15,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:15,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:15,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:19,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:19,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:19,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349634231] [2024-06-14 13:18:19,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349634231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:19,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:19,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:18:19,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672333914] [2024-06-14 13:18:19,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:19,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:18:19,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:19,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:18:19,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:18:19,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 53 [2024-06-14 13:18:19,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 179 transitions, 1718 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:19,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:19,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 53 [2024-06-14 13:18:19,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:23,190 INFO L124 PetriNetUnfolderBase]: 12057/16440 cut-off events. [2024-06-14 13:18:23,190 INFO L125 PetriNetUnfolderBase]: For 209464/209464 co-relation queries the response was YES. [2024-06-14 13:18:23,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84211 conditions, 16440 events. 12057/16440 cut-off events. For 209464/209464 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 84008 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. [2024-06-14 13:18:23,306 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 199 selfloop transitions, 39 changer transitions 0/242 dead transitions. [2024-06-14 13:18:23,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 242 transitions, 2508 flow [2024-06-14 13:18:23,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:18:23,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:18:23,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-14 13:18:23,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41509433962264153 [2024-06-14 13:18:23,308 INFO L175 Difference]: Start difference. First operand has 118 places, 179 transitions, 1718 flow. Second operand 9 states and 198 transitions. [2024-06-14 13:18:23,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 242 transitions, 2508 flow [2024-06-14 13:18:23,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 242 transitions, 2456 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-14 13:18:23,614 INFO L231 Difference]: Finished difference. Result has 124 places, 184 transitions, 1818 flow [2024-06-14 13:18:23,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1666, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1818, PETRI_PLACES=124, PETRI_TRANSITIONS=184} [2024-06-14 13:18:23,615 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 68 predicate places. [2024-06-14 13:18:23,615 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 184 transitions, 1818 flow [2024-06-14 13:18:23,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:23,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:23,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:23,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 13:18:23,616 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)] === [2024-06-14 13:18:23,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:23,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1876023750, now seen corresponding path program 1 times [2024-06-14 13:18:23,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:23,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678517500] [2024-06-14 13:18:23,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:23,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:23,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:27,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:27,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:27,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678517500] [2024-06-14 13:18:27,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678517500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:27,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:27,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:18:27,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839148435] [2024-06-14 13:18:27,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:27,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:18:27,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:27,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:18:27,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:18:27,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 53 [2024-06-14 13:18:27,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 184 transitions, 1818 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:27,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:27,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 53 [2024-06-14 13:18:27,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:31,792 INFO L124 PetriNetUnfolderBase]: 12141/16556 cut-off events. [2024-06-14 13:18:31,792 INFO L125 PetriNetUnfolderBase]: For 229353/229353 co-relation queries the response was YES. [2024-06-14 13:18:31,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86579 conditions, 16556 events. 12141/16556 cut-off events. For 229353/229353 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 84818 event pairs, 5212 based on Foata normal form. 16/16569 useless extension candidates. Maximal degree in co-relation 86524. Up to 16339 conditions per place. [2024-06-14 13:18:31,950 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 201 selfloop transitions, 25 changer transitions 0/230 dead transitions. [2024-06-14 13:18:31,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 230 transitions, 2516 flow [2024-06-14 13:18:31,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:18:31,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:18:31,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-14 13:18:31,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41778975741239893 [2024-06-14 13:18:31,953 INFO L175 Difference]: Start difference. First operand has 124 places, 184 transitions, 1818 flow. Second operand 7 states and 155 transitions. [2024-06-14 13:18:31,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 230 transitions, 2516 flow [2024-06-14 13:18:32,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 230 transitions, 2410 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 13:18:32,307 INFO L231 Difference]: Finished difference. Result has 124 places, 187 transitions, 1827 flow [2024-06-14 13:18:32,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1712, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1827, PETRI_PLACES=124, PETRI_TRANSITIONS=187} [2024-06-14 13:18:32,308 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 68 predicate places. [2024-06-14 13:18:32,308 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 187 transitions, 1827 flow [2024-06-14 13:18:32,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:32,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:32,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:32,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 13:18:32,309 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)] === [2024-06-14 13:18:32,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:32,310 INFO L85 PathProgramCache]: Analyzing trace with hash 824386344, now seen corresponding path program 1 times [2024-06-14 13:18:32,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:32,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142588639] [2024-06-14 13:18:32,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:32,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:32,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:35,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:35,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142588639] [2024-06-14 13:18:35,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142588639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:35,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:35,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:18:35,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707817231] [2024-06-14 13:18:35,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:35,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:18:35,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:35,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:18:35,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:18:35,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 53 [2024-06-14 13:18:35,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 187 transitions, 1827 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:35,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:35,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 53 [2024-06-14 13:18:35,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:40,897 INFO L124 PetriNetUnfolderBase]: 14685/19867 cut-off events. [2024-06-14 13:18:40,898 INFO L125 PetriNetUnfolderBase]: For 304575/304657 co-relation queries the response was YES. [2024-06-14 13:18:40,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105845 conditions, 19867 events. 14685/19867 cut-off events. For 304575/304657 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 102829 event pairs, 4057 based on Foata normal form. 116/19969 useless extension candidates. Maximal degree in co-relation 105789. Up to 15537 conditions per place. [2024-06-14 13:18:41,032 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 180 selfloop transitions, 112 changer transitions 0/296 dead transitions. [2024-06-14 13:18:41,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 296 transitions, 3293 flow [2024-06-14 13:18:41,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:18:41,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:18:41,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 246 transitions. [2024-06-14 13:18:41,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4641509433962264 [2024-06-14 13:18:41,035 INFO L175 Difference]: Start difference. First operand has 124 places, 187 transitions, 1827 flow. Second operand 10 states and 246 transitions. [2024-06-14 13:18:41,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 296 transitions, 3293 flow [2024-06-14 13:18:41,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 296 transitions, 3212 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 13:18:41,445 INFO L231 Difference]: Finished difference. Result has 132 places, 213 transitions, 2354 flow [2024-06-14 13:18:41,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1746, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2354, PETRI_PLACES=132, PETRI_TRANSITIONS=213} [2024-06-14 13:18:41,445 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 76 predicate places. [2024-06-14 13:18:41,446 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 213 transitions, 2354 flow [2024-06-14 13:18:41,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:41,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:41,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:41,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 13:18:41,446 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)] === [2024-06-14 13:18:41,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:41,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1811948022, now seen corresponding path program 2 times [2024-06-14 13:18:41,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:41,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999130546] [2024-06-14 13:18:41,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:41,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:41,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:44,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:44,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:44,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999130546] [2024-06-14 13:18:44,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999130546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:44,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:44,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:18:44,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037278683] [2024-06-14 13:18:44,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:44,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:18:44,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:44,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:18:44,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:18:44,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 53 [2024-06-14 13:18:44,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 213 transitions, 2354 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:44,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:44,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 53 [2024-06-14 13:18:44,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:50,969 INFO L124 PetriNetUnfolderBase]: 16447/22117 cut-off events. [2024-06-14 13:18:50,970 INFO L125 PetriNetUnfolderBase]: For 388205/388213 co-relation queries the response was YES. [2024-06-14 13:18:51,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129553 conditions, 22117 events. 16447/22117 cut-off events. For 388205/388213 co-relation queries the response was YES. Maximal size of possible extension queue 747. Compared 114514 event pairs, 6209 based on Foata normal form. 54/22166 useless extension candidates. Maximal degree in co-relation 129493. Up to 19571 conditions per place. [2024-06-14 13:18:51,174 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 221 selfloop transitions, 76 changer transitions 0/301 dead transitions. [2024-06-14 13:18:51,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 301 transitions, 3718 flow [2024-06-14 13:18:51,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:18:51,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:18:51,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-14 13:18:51,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4188679245283019 [2024-06-14 13:18:51,178 INFO L175 Difference]: Start difference. First operand has 132 places, 213 transitions, 2354 flow. Second operand 10 states and 222 transitions. [2024-06-14 13:18:51,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 301 transitions, 3718 flow [2024-06-14 13:18:52,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 301 transitions, 3483 flow, removed 83 selfloop flow, removed 4 redundant places. [2024-06-14 13:18:52,167 INFO L231 Difference]: Finished difference. Result has 140 places, 235 transitions, 2652 flow [2024-06-14 13:18:52,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2168, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2652, PETRI_PLACES=140, PETRI_TRANSITIONS=235} [2024-06-14 13:18:52,168 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 84 predicate places. [2024-06-14 13:18:52,168 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 235 transitions, 2652 flow [2024-06-14 13:18:52,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:52,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:52,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:52,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 13:18:52,169 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)] === [2024-06-14 13:18:52,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:52,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1595555614, now seen corresponding path program 3 times [2024-06-14 13:18:52,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:52,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448207297] [2024-06-14 13:18:52,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:52,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:52,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:55,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:55,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:55,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448207297] [2024-06-14 13:18:55,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448207297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:55,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:55,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:18:55,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118533009] [2024-06-14 13:18:55,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:55,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:18:55,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:55,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:18:55,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:18:55,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 53 [2024-06-14 13:18:55,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 235 transitions, 2652 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:55,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:55,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 53 [2024-06-14 13:18:55,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:01,924 INFO L124 PetriNetUnfolderBase]: 16907/22713 cut-off events. [2024-06-14 13:19:01,925 INFO L125 PetriNetUnfolderBase]: For 422936/422944 co-relation queries the response was YES. [2024-06-14 13:19:01,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135197 conditions, 22713 events. 16907/22713 cut-off events. For 422936/422944 co-relation queries the response was YES. Maximal size of possible extension queue 779. Compared 118015 event pairs, 6209 based on Foata normal form. 54/22762 useless extension candidates. Maximal degree in co-relation 135133. Up to 19827 conditions per place. [2024-06-14 13:19:02,084 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 216 selfloop transitions, 93 changer transitions 0/313 dead transitions. [2024-06-14 13:19:02,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 313 transitions, 3866 flow [2024-06-14 13:19:02,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:19:02,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:19:02,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 239 transitions. [2024-06-14 13:19:02,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4099485420240137 [2024-06-14 13:19:02,086 INFO L175 Difference]: Start difference. First operand has 140 places, 235 transitions, 2652 flow. Second operand 11 states and 239 transitions. [2024-06-14 13:19:02,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 313 transitions, 3866 flow [2024-06-14 13:19:02,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 313 transitions, 3743 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-14 13:19:02,826 INFO L231 Difference]: Finished difference. Result has 148 places, 249 transitions, 3030 flow [2024-06-14 13:19:02,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2539, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3030, PETRI_PLACES=148, PETRI_TRANSITIONS=249} [2024-06-14 13:19:02,827 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 92 predicate places. [2024-06-14 13:19:02,827 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 249 transitions, 3030 flow [2024-06-14 13:19:02,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:02,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:02,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:02,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 13:19:02,827 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)] === [2024-06-14 13:19:02,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:02,828 INFO L85 PathProgramCache]: Analyzing trace with hash 2036856966, now seen corresponding path program 4 times [2024-06-14 13:19:02,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:02,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152523691] [2024-06-14 13:19:02,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:02,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:02,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:06,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:06,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:06,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152523691] [2024-06-14 13:19:06,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152523691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:06,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:06,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:06,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026575599] [2024-06-14 13:19:06,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:06,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:06,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:06,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:06,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:07,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 53 [2024-06-14 13:19:07,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 249 transitions, 3030 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:07,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:07,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 53 [2024-06-14 13:19:07,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:13,959 INFO L124 PetriNetUnfolderBase]: 19739/26357 cut-off events. [2024-06-14 13:19:13,960 INFO L125 PetriNetUnfolderBase]: For 535898/535906 co-relation queries the response was YES. [2024-06-14 13:19:14,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161643 conditions, 26357 events. 19739/26357 cut-off events. For 535898/535906 co-relation queries the response was YES. Maximal size of possible extension queue 963. Compared 137532 event pairs, 6508 based on Foata normal form. 54/26406 useless extension candidates. Maximal degree in co-relation 161575. Up to 20517 conditions per place. [2024-06-14 13:19:14,203 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 222 selfloop transitions, 144 changer transitions 0/370 dead transitions. [2024-06-14 13:19:14,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 370 transitions, 4858 flow [2024-06-14 13:19:14,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:19:14,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:19:14,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 259 transitions. [2024-06-14 13:19:14,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.444253859348199 [2024-06-14 13:19:14,205 INFO L175 Difference]: Start difference. First operand has 148 places, 249 transitions, 3030 flow. Second operand 11 states and 259 transitions. [2024-06-14 13:19:14,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 370 transitions, 4858 flow [2024-06-14 13:19:15,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 370 transitions, 4723 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-14 13:19:15,370 INFO L231 Difference]: Finished difference. Result has 155 places, 285 transitions, 3752 flow [2024-06-14 13:19:15,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2895, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3752, PETRI_PLACES=155, PETRI_TRANSITIONS=285} [2024-06-14 13:19:15,371 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 99 predicate places. [2024-06-14 13:19:15,371 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 285 transitions, 3752 flow [2024-06-14 13:19:15,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:15,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:15,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:15,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 13:19:15,372 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)] === [2024-06-14 13:19:15,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:15,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1758695310, now seen corresponding path program 1 times [2024-06-14 13:19:15,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:15,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130050981] [2024-06-14 13:19:15,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:15,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:15,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat