./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/rfi006_power.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/rfi006_power.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/rfi006_power.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/rfi006_power.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 03:41:01,421 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 03:41:01,488 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 03:41:01,494 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 03:41:01,494 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 03:41:01,517 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 03:41:01,517 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 03:41:01,518 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 03:41:01,518 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 03:41:01,521 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 03:41:01,521 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 03:41:01,522 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 03:41:01,522 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 03:41:01,523 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 03:41:01,523 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 03:41:01,524 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 03:41:01,524 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 03:41:01,524 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 03:41:01,524 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 03:41:01,524 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 03:41:01,525 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 03:41:01,525 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 03:41:01,525 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 03:41:01,525 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 03:41:01,526 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 03:41:01,526 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 03:41:01,526 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 03:41:01,526 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 03:41:01,527 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 03:41:01,527 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 03:41:01,528 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 03:41:01,528 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 03:41:01,528 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 03:41:01,528 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 03:41:01,529 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 03:41:01,529 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 03:41:01,529 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 03:41:01,529 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 03:41:01,529 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 03:41:01,529 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 03:41:01,530 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 03:41:01,530 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 03:41:01,530 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 03:41:01,531 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 03:41:01,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 03:41:01,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 03:41:01,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 03:41:01,748 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 03:41:01,749 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 03:41:01,750 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/rfi006_power.opt.yml/witness.yml [2024-06-28 03:41:01,987 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 03:41:01,987 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 03:41:01,988 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi006_power.opt.i [2024-06-28 03:41:03,037 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 03:41:03,224 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 03:41:03,230 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi006_power.opt.i [2024-06-28 03:41:03,244 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d28396657/f58a49cb584445379378697d39d5b3c4/FLAG67ff39c22 [2024-06-28 03:41:03,261 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d28396657/f58a49cb584445379378697d39d5b3c4 [2024-06-28 03:41:03,261 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 03:41:03,262 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 03:41:03,265 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 03:41:03,265 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 03:41:03,268 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 03:41:03,299 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:41:01" (1/2) ... [2024-06-28 03:41:03,304 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27027004 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:41:03, skipping insertion in model container [2024-06-28 03:41:03,304 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:41:01" (1/2) ... [2024-06-28 03:41:03,305 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6b7fb1bb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:41:03, skipping insertion in model container [2024-06-28 03:41:03,305 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 03:41:03" (2/2) ... [2024-06-28 03:41:03,306 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27027004 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:41:03, skipping insertion in model container [2024-06-28 03:41:03,306 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 03:41:03" (2/2) ... [2024-06-28 03:41:03,306 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 03:41:03,462 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 03:41:03,463 INFO L97 edCorrectnessWitness]: Location invariant before [L860-L860] ((((((((((((((((((((((((((((((((! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & x && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1)))) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & x && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-28 03:41:03,463 INFO L97 edCorrectnessWitness]: Location invariant before [L862-L862] ((((((((((((((((((((((((((((((((! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & x && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1)))) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & x && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-28 03:41:03,464 INFO L97 edCorrectnessWitness]: Location invariant before [L863-L863] ((((((((((((((((((((((((((((((((! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & x && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1)))) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & x && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-28 03:41:03,464 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 03:41:03,464 INFO L106 edCorrectnessWitness]: ghost_update [L858-L858] multithreaded = 1; [2024-06-28 03:41:03,502 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 03:41:03,831 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 03:41:03,841 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 03:41:04,017 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 03:41:04,058 INFO L206 MainTranslator]: Completed translation [2024-06-28 03:41:04,058 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:41:04 WrapperNode [2024-06-28 03:41:04,058 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 03:41:04,059 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 03:41:04,059 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 03:41:04,059 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 03:41:04,069 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:41:04" (1/1) ... [2024-06-28 03:41:04,095 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:41:04" (1/1) ... [2024-06-28 03:41:04,136 INFO L138 Inliner]: procedures = 175, calls = 88, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 251 [2024-06-28 03:41:04,138 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 03:41:04,139 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 03:41:04,139 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 03:41:04,139 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 03:41:04,147 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:41:04" (1/1) ... [2024-06-28 03:41:04,148 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:41:04" (1/1) ... [2024-06-28 03:41:04,160 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:41:04" (1/1) ... [2024-06-28 03:41:04,178 INFO L175 MemorySlicer]: Split 46 memory accesses to 2 slices as follows [2, 44]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 6 writes are split as follows [0, 6]. [2024-06-28 03:41:04,178 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:41:04" (1/1) ... [2024-06-28 03:41:04,178 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:41:04" (1/1) ... [2024-06-28 03:41:04,189 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:41:04" (1/1) ... [2024-06-28 03:41:04,191 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:41:04" (1/1) ... [2024-06-28 03:41:04,193 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:41:04" (1/1) ... [2024-06-28 03:41:04,196 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:41:04" (1/1) ... [2024-06-28 03:41:04,202 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 03:41:04,213 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 03:41:04,214 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 03:41:04,214 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 03:41:04,215 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:41:04" (1/1) ... [2024-06-28 03:41:04,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 03:41:04,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 03:41:04,238 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) [2024-06-28 03:41:04,261 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 [2024-06-28 03:41:04,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 03:41:04,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 03:41:04,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 03:41:04,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 03:41:04,276 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 03:41:04,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 03:41:04,276 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 03:41:04,276 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 03:41:04,276 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 03:41:04,276 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 03:41:04,276 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 03:41:04,277 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 03:41:04,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 03:41:04,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 03:41:04,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 03:41:04,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 03:41:04,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 03:41:04,279 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 03:41:04,406 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 03:41:04,408 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 03:41:04,963 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 03:41:04,964 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 03:41:05,359 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 03:41:05,360 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 03:41:05,360 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 03:41:05 BoogieIcfgContainer [2024-06-28 03:41:05,360 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 03:41:05,362 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 03:41:05,362 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 03:41:05,365 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 03:41:05,365 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:41:01" (1/4) ... [2024-06-28 03:41:05,366 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a45246a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 03:41:05, skipping insertion in model container [2024-06-28 03:41:05,366 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 03:41:03" (2/4) ... [2024-06-28 03:41:05,366 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a45246a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 03:41:05, skipping insertion in model container [2024-06-28 03:41:05,366 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:41:04" (3/4) ... [2024-06-28 03:41:05,367 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a45246a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 03:41:05, skipping insertion in model container [2024-06-28 03:41:05,367 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 03:41:05" (4/4) ... [2024-06-28 03:41:05,368 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi006_power.opt.i [2024-06-28 03:41:05,383 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 03:41:05,383 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 03:41:05,384 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 03:41:05,450 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 03:41:05,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 03:41:05,515 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-28 03:41:05,515 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 03:41:05,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 60 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 03:41:05,518 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 03:41:05,578 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-28 03:41:05,596 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 03:41:05,602 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;@52aa89b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 03:41:05,640 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 03:41:05,644 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 03:41:05,645 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 03:41:05,645 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 03:41:05,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:41:05,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 03:41:05,646 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:41:05,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:41:05,663 INFO L85 PathProgramCache]: Analyzing trace with hash 845214433, now seen corresponding path program 1 times [2024-06-28 03:41:05,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:41:05,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108538808] [2024-06-28 03:41:05,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:41:05,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:41:05,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:41:07,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:41:07,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:41:07,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108538808] [2024-06-28 03:41:07,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108538808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:41:07,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:41:07,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 03:41:07,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568092266] [2024-06-28 03:41:07,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:41:07,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 03:41:07,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:41:07,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 03:41:07,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 03:41:07,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:41:07,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:41:07,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:41:07,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:41:07,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:41:07,794 INFO L124 PetriNetUnfolderBase]: 990/1587 cut-off events. [2024-06-28 03:41:07,794 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-28 03:41:07,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3167 conditions, 1587 events. 990/1587 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7708 event pairs, 650 based on Foata normal form. 1/1553 useless extension candidates. Maximal degree in co-relation 3155. Up to 1503 conditions per place. [2024-06-28 03:41:07,806 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 34 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-28 03:41:07,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 181 flow [2024-06-28 03:41:07,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 03:41:07,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 03:41:07,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-28 03:41:07,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-28 03:41:07,816 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 71 transitions. [2024-06-28 03:41:07,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 181 flow [2024-06-28 03:41:07,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 03:41:07,820 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-28 03:41:07,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-28 03:41:07,824 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-28 03:41:07,824 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-28 03:41:07,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:41:07,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:41:07,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:41:07,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 03:41:07,825 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:41:07,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:41:07,826 INFO L85 PathProgramCache]: Analyzing trace with hash 503350296, now seen corresponding path program 1 times [2024-06-28 03:41:07,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:41:07,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094689308] [2024-06-28 03:41:07,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:41:07,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:41:07,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:41:09,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:41:09,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:41:09,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094689308] [2024-06-28 03:41:09,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094689308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:41:09,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:41:09,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 03:41:09,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977114606] [2024-06-28 03:41:09,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:41:09,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 03:41:09,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:41:09,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 03:41:09,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 03:41:09,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:41:09,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:41:09,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:41:09,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:41:09,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:41:10,348 INFO L124 PetriNetUnfolderBase]: 984/1578 cut-off events. [2024-06-28 03:41:10,348 INFO L125 PetriNetUnfolderBase]: For 292/292 co-relation queries the response was YES. [2024-06-28 03:41:10,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3587 conditions, 1578 events. 984/1578 cut-off events. For 292/292 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7687 event pairs, 540 based on Foata normal form. 3/1575 useless extension candidates. Maximal degree in co-relation 3575. Up to 1475 conditions per place. [2024-06-28 03:41:10,355 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 43 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-06-28 03:41:10,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 256 flow [2024-06-28 03:41:10,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 03:41:10,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 03:41:10,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-06-28 03:41:10,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-28 03:41:10,373 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 93 transitions. [2024-06-28 03:41:10,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 256 flow [2024-06-28 03:41:10,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 03:41:10,375 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-28 03:41:10,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-28 03:41:10,376 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-28 03:41:10,376 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-28 03:41:10,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:41:10,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:41:10,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:41:10,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 03:41:10,376 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:41:10,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:41:10,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1576008033, now seen corresponding path program 1 times [2024-06-28 03:41:10,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:41:10,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348218044] [2024-06-28 03:41:10,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:41:10,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:41:10,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:41:12,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:41:12,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:41:12,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348218044] [2024-06-28 03:41:12,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348218044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:41:12,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:41:12,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 03:41:12,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976224738] [2024-06-28 03:41:12,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:41:12,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 03:41:12,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:41:12,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 03:41:12,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 03:41:12,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:41:12,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:41:12,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:41:12,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:41:12,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:41:12,910 INFO L124 PetriNetUnfolderBase]: 1209/1891 cut-off events. [2024-06-28 03:41:12,910 INFO L125 PetriNetUnfolderBase]: For 982/982 co-relation queries the response was YES. [2024-06-28 03:41:12,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4798 conditions, 1891 events. 1209/1891 cut-off events. For 982/982 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9047 event pairs, 475 based on Foata normal form. 5/1892 useless extension candidates. Maximal degree in co-relation 4784. Up to 1726 conditions per place. [2024-06-28 03:41:12,921 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 16 changer transitions 0/81 dead transitions. [2024-06-28 03:41:12,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 81 transitions, 420 flow [2024-06-28 03:41:12,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:41:12,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:41:12,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-28 03:41:12,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-28 03:41:12,927 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 119 transitions. [2024-06-28 03:41:12,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 81 transitions, 420 flow [2024-06-28 03:41:12,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 81 transitions, 406 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-28 03:41:12,931 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 237 flow [2024-06-28 03:41:12,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-06-28 03:41:12,932 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-28 03:41:12,932 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 237 flow [2024-06-28 03:41:12,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:41:12,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:41:12,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:41:12,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 03:41:12,933 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:41:12,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:41:12,933 INFO L85 PathProgramCache]: Analyzing trace with hash 725087990, now seen corresponding path program 1 times [2024-06-28 03:41:12,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:41:12,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454882245] [2024-06-28 03:41:12,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:41:12,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:41:12,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:41:14,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:41:14,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:41:14,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454882245] [2024-06-28 03:41:14,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454882245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:41:14,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:41:14,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:41:14,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928250644] [2024-06-28 03:41:14,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:41:14,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:41:14,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:41:14,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:41:14,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:41:14,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:41:14,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:41:14,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:41:14,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:41:14,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:41:15,629 INFO L124 PetriNetUnfolderBase]: 1224/1916 cut-off events. [2024-06-28 03:41:15,629 INFO L125 PetriNetUnfolderBase]: For 2351/2354 co-relation queries the response was YES. [2024-06-28 03:41:15,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5767 conditions, 1916 events. 1224/1916 cut-off events. For 2351/2354 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9220 event pairs, 330 based on Foata normal form. 12/1924 useless extension candidates. Maximal degree in co-relation 5750. Up to 1687 conditions per place. [2024-06-28 03:41:15,639 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 64 selfloop transitions, 19 changer transitions 0/89 dead transitions. [2024-06-28 03:41:15,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 89 transitions, 527 flow [2024-06-28 03:41:15,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:41:15,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:41:15,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-28 03:41:15,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2024-06-28 03:41:15,641 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 237 flow. Second operand 6 states and 136 transitions. [2024-06-28 03:41:15,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 89 transitions, 527 flow [2024-06-28 03:41:15,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 89 transitions, 519 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-28 03:41:15,648 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 293 flow [2024-06-28 03:41:15,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=293, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-06-28 03:41:15,649 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-28 03:41:15,650 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 293 flow [2024-06-28 03:41:15,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:41:15,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:41:15,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:41:15,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 03:41:15,650 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:41:15,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:41:15,651 INFO L85 PathProgramCache]: Analyzing trace with hash 650667592, now seen corresponding path program 1 times [2024-06-28 03:41:15,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:41:15,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623374580] [2024-06-28 03:41:15,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:41:15,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:41:15,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:41:16,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:41:16,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:41:16,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623374580] [2024-06-28 03:41:16,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623374580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:41:16,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:41:16,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:41:16,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110227997] [2024-06-28 03:41:16,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:41:16,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:41:16,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:41:16,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:41:16,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:41:16,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:41:16,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 293 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:41:16,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:41:16,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:41:16,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:41:17,639 INFO L124 PetriNetUnfolderBase]: 1219/1906 cut-off events. [2024-06-28 03:41:17,639 INFO L125 PetriNetUnfolderBase]: For 3470/3470 co-relation queries the response was YES. [2024-06-28 03:41:17,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6271 conditions, 1906 events. 1219/1906 cut-off events. For 3470/3470 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9105 event pairs, 468 based on Foata normal form. 2/1904 useless extension candidates. Maximal degree in co-relation 6250. Up to 1831 conditions per place. [2024-06-28 03:41:17,648 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 53 selfloop transitions, 8 changer transitions 0/66 dead transitions. [2024-06-28 03:41:17,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 66 transitions, 449 flow [2024-06-28 03:41:17,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:41:17,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:41:17,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-28 03:41:17,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-28 03:41:17,650 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 293 flow. Second operand 5 states and 89 transitions. [2024-06-28 03:41:17,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 66 transitions, 449 flow [2024-06-28 03:41:17,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 66 transitions, 399 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-28 03:41:17,654 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 267 flow [2024-06-28 03:41:17,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-06-28 03:41:17,654 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-28 03:41:17,654 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 267 flow [2024-06-28 03:41:17,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:41:17,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:41:17,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:41:17,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 03:41:17,655 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:41:17,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:41:17,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1345683177, now seen corresponding path program 1 times [2024-06-28 03:41:17,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:41:17,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243288989] [2024-06-28 03:41:17,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:41:17,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:41:17,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:41:19,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:41:19,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:41:19,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243288989] [2024-06-28 03:41:19,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243288989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:41:19,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:41:19,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:41:19,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608339392] [2024-06-28 03:41:19,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:41:19,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:41:19,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:41:19,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:41:19,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:41:19,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:41:19,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 267 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:41:19,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:41:19,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:41:19,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:41:20,017 INFO L124 PetriNetUnfolderBase]: 1209/1894 cut-off events. [2024-06-28 03:41:20,017 INFO L125 PetriNetUnfolderBase]: For 4025/4025 co-relation queries the response was YES. [2024-06-28 03:41:20,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6208 conditions, 1894 events. 1209/1894 cut-off events. For 4025/4025 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9024 event pairs, 438 based on Foata normal form. 4/1897 useless extension candidates. Maximal degree in co-relation 6185. Up to 1795 conditions per place. [2024-06-28 03:41:20,031 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 59 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2024-06-28 03:41:20,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 75 transitions, 473 flow [2024-06-28 03:41:20,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:41:20,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:41:20,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-28 03:41:20,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-28 03:41:20,033 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 267 flow. Second operand 6 states and 106 transitions. [2024-06-28 03:41:20,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 75 transitions, 473 flow [2024-06-28 03:41:20,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 75 transitions, 451 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-28 03:41:20,038 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 299 flow [2024-06-28 03:41:20,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=299, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2024-06-28 03:41:20,041 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-28 03:41:20,041 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 299 flow [2024-06-28 03:41:20,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:41:20,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:41:20,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:41:20,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 03:41:20,042 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:41:20,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:41:20,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1227774629, now seen corresponding path program 1 times [2024-06-28 03:41:20,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:41:20,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634485295] [2024-06-28 03:41:20,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:41:20,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:41:20,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:41:22,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:41:22,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:41:22,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634485295] [2024-06-28 03:41:22,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634485295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:41:22,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:41:22,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:41:22,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457977986] [2024-06-28 03:41:22,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:41:22,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:41:22,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:41:22,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:41:22,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:41:22,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:41:22,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 299 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:41:22,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:41:22,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:41:22,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:41:23,291 INFO L124 PetriNetUnfolderBase]: 1217/1905 cut-off events. [2024-06-28 03:41:23,292 INFO L125 PetriNetUnfolderBase]: For 5205/5211 co-relation queries the response was YES. [2024-06-28 03:41:23,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6693 conditions, 1905 events. 1217/1905 cut-off events. For 5205/5211 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9114 event pairs, 449 based on Foata normal form. 8/1911 useless extension candidates. Maximal degree in co-relation 6670. Up to 1737 conditions per place. [2024-06-28 03:41:23,302 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 19 changer transitions 0/83 dead transitions. [2024-06-28 03:41:23,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 83 transitions, 561 flow [2024-06-28 03:41:23,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:41:23,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:41:23,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-28 03:41:23,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-28 03:41:23,304 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 299 flow. Second operand 6 states and 115 transitions. [2024-06-28 03:41:23,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 83 transitions, 561 flow [2024-06-28 03:41:23,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 83 transitions, 531 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-28 03:41:23,308 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 341 flow [2024-06-28 03:41:23,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=341, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2024-06-28 03:41:23,308 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-28 03:41:23,308 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 341 flow [2024-06-28 03:41:23,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:41:23,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:41:23,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:41:23,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 03:41:23,309 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:41:23,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:41:23,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1772489447, now seen corresponding path program 2 times [2024-06-28 03:41:23,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:41:23,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914073881] [2024-06-28 03:41:23,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:41:23,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:41:23,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:41:24,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:41:24,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:41:24,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914073881] [2024-06-28 03:41:24,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914073881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:41:24,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:41:24,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:41:24,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227268486] [2024-06-28 03:41:24,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:41:24,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:41:24,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:41:24,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:41:24,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:41:24,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:41:24,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 341 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:41:24,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:41:24,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:41:24,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:41:25,752 INFO L124 PetriNetUnfolderBase]: 1205/1875 cut-off events. [2024-06-28 03:41:25,752 INFO L125 PetriNetUnfolderBase]: For 6242/6242 co-relation queries the response was YES. [2024-06-28 03:41:25,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6808 conditions, 1875 events. 1205/1875 cut-off events. For 6242/6242 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8845 event pairs, 467 based on Foata normal form. 2/1872 useless extension candidates. Maximal degree in co-relation 6784. Up to 1721 conditions per place. [2024-06-28 03:41:25,768 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 52 selfloop transitions, 20 changer transitions 0/77 dead transitions. [2024-06-28 03:41:25,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 77 transitions, 531 flow [2024-06-28 03:41:25,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:41:25,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:41:25,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-28 03:41:25,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-28 03:41:25,770 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 341 flow. Second operand 6 states and 110 transitions. [2024-06-28 03:41:25,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 77 transitions, 531 flow [2024-06-28 03:41:25,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 77 transitions, 502 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 03:41:25,775 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 360 flow [2024-06-28 03:41:25,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=360, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2024-06-28 03:41:25,776 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-28 03:41:25,776 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 360 flow [2024-06-28 03:41:25,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:41:25,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:41:25,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:41:25,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 03:41:25,777 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:41:25,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:41:25,778 INFO L85 PathProgramCache]: Analyzing trace with hash -3161514, now seen corresponding path program 1 times [2024-06-28 03:41:25,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:41:25,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488371893] [2024-06-28 03:41:25,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:41:25,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:41:25,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:41:27,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:41:27,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:41:27,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488371893] [2024-06-28 03:41:27,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488371893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:41:27,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:41:27,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:41:27,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777117790] [2024-06-28 03:41:27,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:41:27,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:41:27,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:41:27,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:41:27,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:41:27,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:41:27,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 360 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:41:27,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:41:27,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:41:27,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:41:28,546 INFO L124 PetriNetUnfolderBase]: 1413/2216 cut-off events. [2024-06-28 03:41:28,546 INFO L125 PetriNetUnfolderBase]: For 8850/8850 co-relation queries the response was YES. [2024-06-28 03:41:28,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8341 conditions, 2216 events. 1413/2216 cut-off events. For 8850/8850 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10861 event pairs, 393 based on Foata normal form. 8/2219 useless extension candidates. Maximal degree in co-relation 8316. Up to 1716 conditions per place. [2024-06-28 03:41:28,557 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 87 selfloop transitions, 39 changer transitions 0/131 dead transitions. [2024-06-28 03:41:28,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 131 transitions, 1029 flow [2024-06-28 03:41:28,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:41:28,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:41:28,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-28 03:41:28,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-28 03:41:28,559 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 360 flow. Second operand 8 states and 161 transitions. [2024-06-28 03:41:28,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 131 transitions, 1029 flow [2024-06-28 03:41:28,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 131 transitions, 903 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-28 03:41:28,567 INFO L231 Difference]: Finished difference. Result has 69 places, 82 transitions, 581 flow [2024-06-28 03:41:28,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=581, PETRI_PLACES=69, PETRI_TRANSITIONS=82} [2024-06-28 03:41:28,568 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-28 03:41:28,568 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 82 transitions, 581 flow [2024-06-28 03:41:28,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:41:28,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:41:28,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:41:28,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 03:41:28,569 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:41:28,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:41:28,569 INFO L85 PathProgramCache]: Analyzing trace with hash -593690184, now seen corresponding path program 2 times [2024-06-28 03:41:28,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:41:28,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635336980] [2024-06-28 03:41:28,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:41:28,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:41:28,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:41:30,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:41:30,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:41:30,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635336980] [2024-06-28 03:41:30,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635336980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:41:30,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:41:30,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:41:30,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578361813] [2024-06-28 03:41:30,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:41:30,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:41:30,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:41:30,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:41:30,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:41:30,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:41:30,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 82 transitions, 581 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:41:30,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:41:30,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:41:30,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:41:31,930 INFO L124 PetriNetUnfolderBase]: 1501/2372 cut-off events. [2024-06-28 03:41:31,930 INFO L125 PetriNetUnfolderBase]: For 11704/11710 co-relation queries the response was YES. [2024-06-28 03:41:31,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9771 conditions, 2372 events. 1501/2372 cut-off events. For 11704/11710 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 11921 event pairs, 409 based on Foata normal form. 16/2383 useless extension candidates. Maximal degree in co-relation 9742. Up to 1772 conditions per place. [2024-06-28 03:41:31,943 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 71 selfloop transitions, 48 changer transitions 0/124 dead transitions. [2024-06-28 03:41:31,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 124 transitions, 1027 flow [2024-06-28 03:41:31,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:41:31,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:41:31,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-28 03:41:31,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-28 03:41:31,945 INFO L175 Difference]: Start difference. First operand has 69 places, 82 transitions, 581 flow. Second operand 7 states and 137 transitions. [2024-06-28 03:41:31,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 124 transitions, 1027 flow [2024-06-28 03:41:31,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 124 transitions, 999 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-28 03:41:31,954 INFO L231 Difference]: Finished difference. Result has 74 places, 89 transitions, 734 flow [2024-06-28 03:41:31,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=734, PETRI_PLACES=74, PETRI_TRANSITIONS=89} [2024-06-28 03:41:31,955 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-06-28 03:41:31,955 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 89 transitions, 734 flow [2024-06-28 03:41:31,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:41:31,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:41:31,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:41:31,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 03:41:31,956 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:41:31,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:41:31,956 INFO L85 PathProgramCache]: Analyzing trace with hash 852548502, now seen corresponding path program 3 times [2024-06-28 03:41:31,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:41:31,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857970911] [2024-06-28 03:41:31,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:41:31,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:41:31,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:41:34,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:41:34,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:41:34,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857970911] [2024-06-28 03:41:34,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857970911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:41:34,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:41:34,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:41:34,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182618541] [2024-06-28 03:41:34,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:41:34,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:41:34,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:41:34,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:41:34,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:41:34,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:41:34,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 89 transitions, 734 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:41:34,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:41:34,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:41:34,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:41:35,356 INFO L124 PetriNetUnfolderBase]: 1545/2420 cut-off events. [2024-06-28 03:41:35,357 INFO L125 PetriNetUnfolderBase]: For 14451/14455 co-relation queries the response was YES. [2024-06-28 03:41:35,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10786 conditions, 2420 events. 1545/2420 cut-off events. For 14451/14455 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11905 event pairs, 429 based on Foata normal form. 8/2418 useless extension candidates. Maximal degree in co-relation 10755. Up to 1790 conditions per place. [2024-06-28 03:41:35,369 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 69 selfloop transitions, 58 changer transitions 0/132 dead transitions. [2024-06-28 03:41:35,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 132 transitions, 1286 flow [2024-06-28 03:41:35,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:41:35,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:41:35,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-28 03:41:35,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-28 03:41:35,371 INFO L175 Difference]: Start difference. First operand has 74 places, 89 transitions, 734 flow. Second operand 7 states and 137 transitions. [2024-06-28 03:41:35,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 132 transitions, 1286 flow [2024-06-28 03:41:35,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 132 transitions, 1170 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-28 03:41:35,384 INFO L231 Difference]: Finished difference. Result has 77 places, 99 transitions, 878 flow [2024-06-28 03:41:35,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=878, PETRI_PLACES=77, PETRI_TRANSITIONS=99} [2024-06-28 03:41:35,385 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 34 predicate places. [2024-06-28 03:41:35,385 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 99 transitions, 878 flow [2024-06-28 03:41:35,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:41:35,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:41:35,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:41:35,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 03:41:35,385 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:41:35,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:41:35,386 INFO L85 PathProgramCache]: Analyzing trace with hash -421673328, now seen corresponding path program 4 times [2024-06-28 03:41:35,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:41:35,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890250903] [2024-06-28 03:41:35,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:41:35,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:41:35,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:41:37,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:41:37,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:41:37,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890250903] [2024-06-28 03:41:37,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890250903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:41:37,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:41:37,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:41:37,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384510263] [2024-06-28 03:41:37,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:41:37,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:41:37,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:41:37,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:41:37,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:41:37,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:41:37,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 99 transitions, 878 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:41:37,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:41:37,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:41:37,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:41:38,404 INFO L124 PetriNetUnfolderBase]: 1529/2407 cut-off events. [2024-06-28 03:41:38,404 INFO L125 PetriNetUnfolderBase]: For 14712/14722 co-relation queries the response was YES. [2024-06-28 03:41:38,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10594 conditions, 2407 events. 1529/2407 cut-off events. For 14712/14722 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12020 event pairs, 409 based on Foata normal form. 14/2409 useless extension candidates. Maximal degree in co-relation 10562. Up to 1783 conditions per place. [2024-06-28 03:41:38,418 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 65 selfloop transitions, 60 changer transitions 0/130 dead transitions. [2024-06-28 03:41:38,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 130 transitions, 1260 flow [2024-06-28 03:41:38,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:41:38,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:41:38,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-28 03:41:38,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-06-28 03:41:38,420 INFO L175 Difference]: Start difference. First operand has 77 places, 99 transitions, 878 flow. Second operand 7 states and 134 transitions. [2024-06-28 03:41:38,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 130 transitions, 1260 flow [2024-06-28 03:41:38,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 130 transitions, 1173 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-28 03:41:38,438 INFO L231 Difference]: Finished difference. Result has 82 places, 99 transitions, 921 flow [2024-06-28 03:41:38,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=791, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=921, PETRI_PLACES=82, PETRI_TRANSITIONS=99} [2024-06-28 03:41:38,440 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-28 03:41:38,440 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 99 transitions, 921 flow [2024-06-28 03:41:38,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:41:38,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:41:38,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:41:38,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 03:41:38,441 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:41:38,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:41:38,441 INFO L85 PathProgramCache]: Analyzing trace with hash -270447297, now seen corresponding path program 1 times [2024-06-28 03:41:38,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:41:38,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340489014] [2024-06-28 03:41:38,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:41:38,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:41:38,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:41:40,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:41:40,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:41:40,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340489014] [2024-06-28 03:41:40,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340489014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:41:40,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:41:40,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:41:40,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115500146] [2024-06-28 03:41:40,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:41:40,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:41:40,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:41:40,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:41:40,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:41:41,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:41:41,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 99 transitions, 921 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-28 03:41:41,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:41:41,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:41:41,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:41:42,342 INFO L124 PetriNetUnfolderBase]: 1581/2512 cut-off events. [2024-06-28 03:41:42,342 INFO L125 PetriNetUnfolderBase]: For 17019/17025 co-relation queries the response was YES. [2024-06-28 03:41:42,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11392 conditions, 2512 events. 1581/2512 cut-off events. For 17019/17025 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12794 event pairs, 418 based on Foata normal form. 12/2519 useless extension candidates. Maximal degree in co-relation 11357. Up to 1827 conditions per place. [2024-06-28 03:41:42,357 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 79 selfloop transitions, 62 changer transitions 0/146 dead transitions. [2024-06-28 03:41:42,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 146 transitions, 1455 flow [2024-06-28 03:41:42,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:41:42,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:41:42,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-28 03:41:42,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-28 03:41:42,359 INFO L175 Difference]: Start difference. First operand has 82 places, 99 transitions, 921 flow. Second operand 8 states and 154 transitions. [2024-06-28 03:41:42,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 146 transitions, 1455 flow [2024-06-28 03:41:42,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 146 transitions, 1291 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-28 03:41:42,373 INFO L231 Difference]: Finished difference. Result has 83 places, 105 transitions, 981 flow [2024-06-28 03:41:42,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=981, PETRI_PLACES=83, PETRI_TRANSITIONS=105} [2024-06-28 03:41:42,373 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 40 predicate places. [2024-06-28 03:41:42,373 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 105 transitions, 981 flow [2024-06-28 03:41:42,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-28 03:41:42,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:41:42,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:41:42,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 03:41:42,374 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:41:42,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:41:42,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1224530305, now seen corresponding path program 2 times [2024-06-28 03:41:42,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:41:42,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8360857] [2024-06-28 03:41:42,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:41:42,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:41:42,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:41:44,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:41:44,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:41:44,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8360857] [2024-06-28 03:41:44,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8360857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:41:44,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:41:44,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:41:44,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606570022] [2024-06-28 03:41:44,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:41:44,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:41:44,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:41:44,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:41:44,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:41:44,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:41:44,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 105 transitions, 981 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:41:44,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:41:44,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:41:44,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:41:45,498 INFO L124 PetriNetUnfolderBase]: 1621/2602 cut-off events. [2024-06-28 03:41:45,498 INFO L125 PetriNetUnfolderBase]: For 19560/19568 co-relation queries the response was YES. [2024-06-28 03:41:45,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11727 conditions, 2602 events. 1621/2602 cut-off events. For 19560/19568 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13520 event pairs, 435 based on Foata normal form. 16/2613 useless extension candidates. Maximal degree in co-relation 11692. Up to 1862 conditions per place. [2024-06-28 03:41:45,532 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 76 selfloop transitions, 69 changer transitions 0/150 dead transitions. [2024-06-28 03:41:45,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 150 transitions, 1521 flow [2024-06-28 03:41:45,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:41:45,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:41:45,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-28 03:41:45,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-28 03:41:45,534 INFO L175 Difference]: Start difference. First operand has 83 places, 105 transitions, 981 flow. Second operand 7 states and 142 transitions. [2024-06-28 03:41:45,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 150 transitions, 1521 flow [2024-06-28 03:41:45,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 150 transitions, 1357 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-28 03:41:45,551 INFO L231 Difference]: Finished difference. Result has 84 places, 111 transitions, 1054 flow [2024-06-28 03:41:45,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1054, PETRI_PLACES=84, PETRI_TRANSITIONS=111} [2024-06-28 03:41:45,551 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 41 predicate places. [2024-06-28 03:41:45,551 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 111 transitions, 1054 flow [2024-06-28 03:41:45,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:41:45,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:41:45,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:41:45,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 03:41:45,552 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:41:45,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:41:45,553 INFO L85 PathProgramCache]: Analyzing trace with hash 666553231, now seen corresponding path program 3 times [2024-06-28 03:41:45,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:41:45,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700822791] [2024-06-28 03:41:45,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:41:45,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:41:45,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:41:47,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:41:47,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:41:47,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700822791] [2024-06-28 03:41:47,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700822791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:41:47,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:41:47,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:41:47,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485741766] [2024-06-28 03:41:47,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:41:47,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:41:47,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:41:47,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:41:47,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:41:47,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:41:47,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 111 transitions, 1054 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-28 03:41:47,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:41:47,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:41:47,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:41:49,247 INFO L124 PetriNetUnfolderBase]: 1665/2670 cut-off events. [2024-06-28 03:41:49,248 INFO L125 PetriNetUnfolderBase]: For 21554/21566 co-relation queries the response was YES. [2024-06-28 03:41:49,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12256 conditions, 2670 events. 1665/2670 cut-off events. For 21554/21566 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13904 event pairs, 413 based on Foata normal form. 15/2678 useless extension candidates. Maximal degree in co-relation 12220. Up to 1900 conditions per place. [2024-06-28 03:41:49,265 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 78 selfloop transitions, 81 changer transitions 0/164 dead transitions. [2024-06-28 03:41:49,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 164 transitions, 1679 flow [2024-06-28 03:41:49,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:41:49,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:41:49,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-28 03:41:49,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261904761904762 [2024-06-28 03:41:49,282 INFO L175 Difference]: Start difference. First operand has 84 places, 111 transitions, 1054 flow. Second operand 10 states and 179 transitions. [2024-06-28 03:41:49,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 164 transitions, 1679 flow [2024-06-28 03:41:49,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 164 transitions, 1492 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-28 03:41:49,301 INFO L231 Difference]: Finished difference. Result has 90 places, 119 transitions, 1156 flow [2024-06-28 03:41:49,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=884, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1156, PETRI_PLACES=90, PETRI_TRANSITIONS=119} [2024-06-28 03:41:49,302 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-28 03:41:49,302 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 119 transitions, 1156 flow [2024-06-28 03:41:49,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-28 03:41:49,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:41:49,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:41:49,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 03:41:49,303 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:41:49,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:41:49,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1080634195, now seen corresponding path program 4 times [2024-06-28 03:41:49,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:41:49,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224079596] [2024-06-28 03:41:49,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:41:49,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:41:49,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:41:51,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:41:51,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:41:51,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224079596] [2024-06-28 03:41:51,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224079596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:41:51,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:41:51,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:41:51,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681601090] [2024-06-28 03:41:51,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:41:51,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:41:51,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:41:51,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:41:51,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:41:51,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:41:51,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 119 transitions, 1156 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-28 03:41:51,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:41:51,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:41:51,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:41:52,895 INFO L124 PetriNetUnfolderBase]: 1649/2619 cut-off events. [2024-06-28 03:41:52,896 INFO L125 PetriNetUnfolderBase]: For 22801/22807 co-relation queries the response was YES. [2024-06-28 03:41:52,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12199 conditions, 2619 events. 1649/2619 cut-off events. For 22801/22807 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13418 event pairs, 451 based on Foata normal form. 9/2612 useless extension candidates. Maximal degree in co-relation 12162. Up to 1887 conditions per place. [2024-06-28 03:41:52,909 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 71 selfloop transitions, 77 changer transitions 0/153 dead transitions. [2024-06-28 03:41:52,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 153 transitions, 1552 flow [2024-06-28 03:41:52,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:41:52,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:41:52,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-28 03:41:52,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-28 03:41:52,913 INFO L175 Difference]: Start difference. First operand has 90 places, 119 transitions, 1156 flow. Second operand 8 states and 150 transitions. [2024-06-28 03:41:52,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 153 transitions, 1552 flow [2024-06-28 03:41:52,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 153 transitions, 1349 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-28 03:41:52,934 INFO L231 Difference]: Finished difference. Result has 92 places, 119 transitions, 1118 flow [2024-06-28 03:41:52,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=953, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1118, PETRI_PLACES=92, PETRI_TRANSITIONS=119} [2024-06-28 03:41:52,934 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-28 03:41:52,935 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 119 transitions, 1118 flow [2024-06-28 03:41:52,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-28 03:41:52,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:41:52,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:41:52,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 03:41:52,935 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:41:52,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:41:52,936 INFO L85 PathProgramCache]: Analyzing trace with hash -186692438, now seen corresponding path program 1 times [2024-06-28 03:41:52,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:41:52,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56445988] [2024-06-28 03:41:52,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:41:52,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:41:52,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:41:55,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:41:55,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:41:55,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56445988] [2024-06-28 03:41:55,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56445988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:41:55,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:41:55,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:41:55,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919374942] [2024-06-28 03:41:55,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:41:55,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:41:55,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:41:55,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:41:55,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:41:55,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:41:55,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 119 transitions, 1118 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-28 03:41:55,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:41:55,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:41:55,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:41:56,343 INFO L124 PetriNetUnfolderBase]: 1641/2647 cut-off events. [2024-06-28 03:41:56,343 INFO L125 PetriNetUnfolderBase]: For 24446/24450 co-relation queries the response was YES. [2024-06-28 03:41:56,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12133 conditions, 2647 events. 1641/2647 cut-off events. For 24446/24450 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13859 event pairs, 589 based on Foata normal form. 5/2651 useless extension candidates. Maximal degree in co-relation 12094. Up to 2403 conditions per place. [2024-06-28 03:41:56,359 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 132 selfloop transitions, 16 changer transitions 0/153 dead transitions. [2024-06-28 03:41:56,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 153 transitions, 1537 flow [2024-06-28 03:41:56,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:41:56,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:41:56,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-28 03:41:56,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-28 03:41:56,361 INFO L175 Difference]: Start difference. First operand has 92 places, 119 transitions, 1118 flow. Second operand 8 states and 137 transitions. [2024-06-28 03:41:56,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 153 transitions, 1537 flow [2024-06-28 03:41:56,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 153 transitions, 1326 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-28 03:41:56,379 INFO L231 Difference]: Finished difference. Result has 93 places, 124 transitions, 999 flow [2024-06-28 03:41:56,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=912, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=999, PETRI_PLACES=93, PETRI_TRANSITIONS=124} [2024-06-28 03:41:56,380 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-28 03:41:56,380 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 124 transitions, 999 flow [2024-06-28 03:41:56,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-28 03:41:56,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:41:56,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:41:56,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 03:41:56,381 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:41:56,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:41:56,381 INFO L85 PathProgramCache]: Analyzing trace with hash -577100878, now seen corresponding path program 1 times [2024-06-28 03:41:56,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:41:56,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856046040] [2024-06-28 03:41:56,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:41:56,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:41:56,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:41:57,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:41:57,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:41:57,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856046040] [2024-06-28 03:41:57,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856046040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:41:57,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:41:57,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:41:57,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819558291] [2024-06-28 03:41:57,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:41:57,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:41:57,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:41:57,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:41:57,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:41:57,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:41:57,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 124 transitions, 999 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:41:57,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:41:57,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:41:57,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:41:58,229 INFO L124 PetriNetUnfolderBase]: 1546/2518 cut-off events. [2024-06-28 03:41:58,229 INFO L125 PetriNetUnfolderBase]: For 26069/26104 co-relation queries the response was YES. [2024-06-28 03:41:58,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11709 conditions, 2518 events. 1546/2518 cut-off events. For 26069/26104 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13540 event pairs, 561 based on Foata normal form. 12/2496 useless extension candidates. Maximal degree in co-relation 11668. Up to 2261 conditions per place. [2024-06-28 03:41:58,243 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 116 selfloop transitions, 8 changer transitions 0/136 dead transitions. [2024-06-28 03:41:58,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 136 transitions, 1293 flow [2024-06-28 03:41:58,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:41:58,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:41:58,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-28 03:41:58,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-28 03:41:58,245 INFO L175 Difference]: Start difference. First operand has 93 places, 124 transitions, 999 flow. Second operand 5 states and 88 transitions. [2024-06-28 03:41:58,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 136 transitions, 1293 flow [2024-06-28 03:41:58,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 136 transitions, 1248 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-28 03:41:58,260 INFO L231 Difference]: Finished difference. Result has 93 places, 127 transitions, 1004 flow [2024-06-28 03:41:58,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=954, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1004, PETRI_PLACES=93, PETRI_TRANSITIONS=127} [2024-06-28 03:41:58,260 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-28 03:41:58,261 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 127 transitions, 1004 flow [2024-06-28 03:41:58,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:41:58,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:41:58,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:41:58,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 03:41:58,261 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:41:58,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:41:58,262 INFO L85 PathProgramCache]: Analyzing trace with hash 2124065667, now seen corresponding path program 1 times [2024-06-28 03:41:58,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:41:58,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315499297] [2024-06-28 03:41:58,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:41:58,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:41:58,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:42:00,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:42:00,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:42:00,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315499297] [2024-06-28 03:42:00,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315499297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:42:00,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:42:00,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:42:00,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265077832] [2024-06-28 03:42:00,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:42:00,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:42:00,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:42:00,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:42:00,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:42:00,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:42:00,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 127 transitions, 1004 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:42:00,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:42:00,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:42:00,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:42:01,150 INFO L124 PetriNetUnfolderBase]: 1658/2668 cut-off events. [2024-06-28 03:42:01,150 INFO L125 PetriNetUnfolderBase]: For 26113/26130 co-relation queries the response was YES. [2024-06-28 03:42:01,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12403 conditions, 2668 events. 1658/2668 cut-off events. For 26113/26130 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 14001 event pairs, 321 based on Foata normal form. 17/2683 useless extension candidates. Maximal degree in co-relation 12361. Up to 2175 conditions per place. [2024-06-28 03:42:01,164 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 124 selfloop transitions, 33 changer transitions 0/162 dead transitions. [2024-06-28 03:42:01,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 162 transitions, 1514 flow [2024-06-28 03:42:01,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:42:01,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:42:01,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-28 03:42:01,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-28 03:42:01,166 INFO L175 Difference]: Start difference. First operand has 93 places, 127 transitions, 1004 flow. Second operand 7 states and 131 transitions. [2024-06-28 03:42:01,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 162 transitions, 1514 flow [2024-06-28 03:42:01,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 162 transitions, 1486 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-28 03:42:01,186 INFO L231 Difference]: Finished difference. Result has 97 places, 131 transitions, 1097 flow [2024-06-28 03:42:01,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=976, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1097, PETRI_PLACES=97, PETRI_TRANSITIONS=131} [2024-06-28 03:42:01,187 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-28 03:42:01,187 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 131 transitions, 1097 flow [2024-06-28 03:42:01,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:42:01,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:42:01,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:42:01,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 03:42:01,187 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:42:01,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:42:01,188 INFO L85 PathProgramCache]: Analyzing trace with hash 2126922627, now seen corresponding path program 2 times [2024-06-28 03:42:01,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:42:01,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434690699] [2024-06-28 03:42:01,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:42:01,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:42:01,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:42:03,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:42:03,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:42:03,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434690699] [2024-06-28 03:42:03,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434690699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:42:03,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:42:03,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:42:03,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341965775] [2024-06-28 03:42:03,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:42:03,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:42:03,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:42:03,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:42:03,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:42:03,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:42:03,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 131 transitions, 1097 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:42:03,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:42:03,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:42:03,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:42:04,304 INFO L124 PetriNetUnfolderBase]: 1650/2646 cut-off events. [2024-06-28 03:42:04,305 INFO L125 PetriNetUnfolderBase]: For 28700/28709 co-relation queries the response was YES. [2024-06-28 03:42:04,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12717 conditions, 2646 events. 1650/2646 cut-off events. For 28700/28709 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13693 event pairs, 429 based on Foata normal form. 9/2653 useless extension candidates. Maximal degree in co-relation 12674. Up to 2271 conditions per place. [2024-06-28 03:42:04,321 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 121 selfloop transitions, 34 changer transitions 0/160 dead transitions. [2024-06-28 03:42:04,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 160 transitions, 1493 flow [2024-06-28 03:42:04,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:42:04,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:42:04,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-28 03:42:04,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-28 03:42:04,323 INFO L175 Difference]: Start difference. First operand has 97 places, 131 transitions, 1097 flow. Second operand 7 states and 129 transitions. [2024-06-28 03:42:04,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 160 transitions, 1493 flow [2024-06-28 03:42:04,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 160 transitions, 1432 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-28 03:42:04,347 INFO L231 Difference]: Finished difference. Result has 101 places, 131 transitions, 1113 flow [2024-06-28 03:42:04,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1036, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1113, PETRI_PLACES=101, PETRI_TRANSITIONS=131} [2024-06-28 03:42:04,348 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-28 03:42:04,348 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 131 transitions, 1113 flow [2024-06-28 03:42:04,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:42:04,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:42:04,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:42:04,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 03:42:04,349 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:42:04,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:42:04,349 INFO L85 PathProgramCache]: Analyzing trace with hash -730812046, now seen corresponding path program 1 times [2024-06-28 03:42:04,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:42:04,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627551870] [2024-06-28 03:42:04,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:42:04,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:42:04,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:42:05,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:42:05,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:42:05,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627551870] [2024-06-28 03:42:05,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627551870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:42:05,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:42:05,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:42:05,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042328439] [2024-06-28 03:42:05,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:42:05,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:42:05,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:42:05,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:42:05,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:42:05,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:42:05,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 131 transitions, 1113 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:42:05,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:42:05,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:42:05,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:42:06,534 INFO L124 PetriNetUnfolderBase]: 1535/2504 cut-off events. [2024-06-28 03:42:06,534 INFO L125 PetriNetUnfolderBase]: For 32292/32317 co-relation queries the response was YES. [2024-06-28 03:42:06,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12328 conditions, 2504 events. 1535/2504 cut-off events. For 32292/32317 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13499 event pairs, 544 based on Foata normal form. 12/2496 useless extension candidates. Maximal degree in co-relation 12283. Up to 2257 conditions per place. [2024-06-28 03:42:06,550 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 119 selfloop transitions, 11 changer transitions 0/144 dead transitions. [2024-06-28 03:42:06,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 144 transitions, 1425 flow [2024-06-28 03:42:06,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:42:06,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:42:06,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-28 03:42:06,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-28 03:42:06,552 INFO L175 Difference]: Start difference. First operand has 101 places, 131 transitions, 1113 flow. Second operand 6 states and 101 transitions. [2024-06-28 03:42:06,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 144 transitions, 1425 flow [2024-06-28 03:42:06,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 144 transitions, 1347 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 03:42:06,580 INFO L231 Difference]: Finished difference. Result has 101 places, 134 transitions, 1095 flow [2024-06-28 03:42:06,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1035, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1095, PETRI_PLACES=101, PETRI_TRANSITIONS=134} [2024-06-28 03:42:06,581 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-28 03:42:06,581 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 134 transitions, 1095 flow [2024-06-28 03:42:06,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:42:06,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:42:06,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:42:06,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 03:42:06,582 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:42:06,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:42:06,582 INFO L85 PathProgramCache]: Analyzing trace with hash 679701858, now seen corresponding path program 1 times [2024-06-28 03:42:06,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:42:06,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403706525] [2024-06-28 03:42:06,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:42:06,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:42:06,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:42:08,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:42:08,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:42:08,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403706525] [2024-06-28 03:42:08,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403706525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:42:08,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:42:08,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:42:08,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427236751] [2024-06-28 03:42:08,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:42:08,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:42:08,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:42:08,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:42:08,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:42:08,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:42:08,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 134 transitions, 1095 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:42:08,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:42:08,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:42:08,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:42:09,933 INFO L124 PetriNetUnfolderBase]: 2066/3358 cut-off events. [2024-06-28 03:42:09,933 INFO L125 PetriNetUnfolderBase]: For 42133/42156 co-relation queries the response was YES. [2024-06-28 03:42:09,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16254 conditions, 3358 events. 2066/3358 cut-off events. For 42133/42156 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18851 event pairs, 560 based on Foata normal form. 22/3371 useless extension candidates. Maximal degree in co-relation 16208. Up to 1801 conditions per place. [2024-06-28 03:42:09,953 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 117 selfloop transitions, 90 changer transitions 0/212 dead transitions. [2024-06-28 03:42:09,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 212 transitions, 2015 flow [2024-06-28 03:42:09,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:42:09,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:42:09,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-28 03:42:09,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 03:42:09,955 INFO L175 Difference]: Start difference. First operand has 101 places, 134 transitions, 1095 flow. Second operand 9 states and 171 transitions. [2024-06-28 03:42:09,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 212 transitions, 2015 flow [2024-06-28 03:42:09,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 212 transitions, 1975 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 03:42:09,984 INFO L231 Difference]: Finished difference. Result has 109 places, 156 transitions, 1521 flow [2024-06-28 03:42:09,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1521, PETRI_PLACES=109, PETRI_TRANSITIONS=156} [2024-06-28 03:42:09,985 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-28 03:42:09,985 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 156 transitions, 1521 flow [2024-06-28 03:42:09,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:42:09,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:42:09,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:42:09,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 03:42:09,986 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:42:09,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:42:09,986 INFO L85 PathProgramCache]: Analyzing trace with hash -985588220, now seen corresponding path program 2 times [2024-06-28 03:42:09,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:42:09,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392039853] [2024-06-28 03:42:09,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:42:09,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:42:10,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:42:11,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:42:11,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:42:11,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392039853] [2024-06-28 03:42:11,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392039853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:42:11,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:42:11,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:42:11,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721567782] [2024-06-28 03:42:11,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:42:11,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:42:11,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:42:11,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:42:11,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:42:11,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:42:11,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 156 transitions, 1521 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:42:11,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:42:11,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:42:11,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:42:12,998 INFO L124 PetriNetUnfolderBase]: 2536/4158 cut-off events. [2024-06-28 03:42:12,998 INFO L125 PetriNetUnfolderBase]: For 60920/60922 co-relation queries the response was YES. [2024-06-28 03:42:13,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21209 conditions, 4158 events. 2536/4158 cut-off events. For 60920/60922 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 24808 event pairs, 603 based on Foata normal form. 18/4171 useless extension candidates. Maximal degree in co-relation 21159. Up to 2351 conditions per place. [2024-06-28 03:42:13,025 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 131 selfloop transitions, 98 changer transitions 0/234 dead transitions. [2024-06-28 03:42:13,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 234 transitions, 2455 flow [2024-06-28 03:42:13,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:42:13,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:42:13,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-28 03:42:13,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-28 03:42:13,027 INFO L175 Difference]: Start difference. First operand has 109 places, 156 transitions, 1521 flow. Second operand 9 states and 182 transitions. [2024-06-28 03:42:13,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 234 transitions, 2455 flow [2024-06-28 03:42:13,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 234 transitions, 2425 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-28 03:42:13,077 INFO L231 Difference]: Finished difference. Result has 118 places, 169 transitions, 1912 flow [2024-06-28 03:42:13,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1503, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1912, PETRI_PLACES=118, PETRI_TRANSITIONS=169} [2024-06-28 03:42:13,078 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-28 03:42:13,078 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 169 transitions, 1912 flow [2024-06-28 03:42:13,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:42:13,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:42:13,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:42:13,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 03:42:13,079 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:42:13,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:42:13,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1175664746, now seen corresponding path program 3 times [2024-06-28 03:42:13,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:42:13,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495402359] [2024-06-28 03:42:13,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:42:13,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:42:13,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:42:15,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:42:15,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:42:15,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495402359] [2024-06-28 03:42:15,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495402359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:42:15,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:42:15,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:42:15,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108209851] [2024-06-28 03:42:15,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:42:15,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:42:15,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:42:15,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:42:15,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:42:15,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:42:15,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 169 transitions, 1912 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:42:15,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:42:15,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:42:15,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:42:17,064 INFO L124 PetriNetUnfolderBase]: 2692/4398 cut-off events. [2024-06-28 03:42:17,065 INFO L125 PetriNetUnfolderBase]: For 73952/73962 co-relation queries the response was YES. [2024-06-28 03:42:17,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23309 conditions, 4398 events. 2692/4398 cut-off events. For 73952/73962 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 26478 event pairs, 642 based on Foata normal form. 46/4433 useless extension candidates. Maximal degree in co-relation 23255. Up to 3233 conditions per place. [2024-06-28 03:42:17,097 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 128 selfloop transitions, 93 changer transitions 0/226 dead transitions. [2024-06-28 03:42:17,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 226 transitions, 2611 flow [2024-06-28 03:42:17,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:42:17,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:42:17,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-28 03:42:17,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-28 03:42:17,099 INFO L175 Difference]: Start difference. First operand has 118 places, 169 transitions, 1912 flow. Second operand 9 states and 177 transitions. [2024-06-28 03:42:17,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 226 transitions, 2611 flow [2024-06-28 03:42:17,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 226 transitions, 2507 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-28 03:42:17,177 INFO L231 Difference]: Finished difference. Result has 123 places, 173 transitions, 2073 flow [2024-06-28 03:42:17,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1808, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2073, PETRI_PLACES=123, PETRI_TRANSITIONS=173} [2024-06-28 03:42:17,178 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-28 03:42:17,178 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 173 transitions, 2073 flow [2024-06-28 03:42:17,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:42:17,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:42:17,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:42:17,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 03:42:17,179 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:42:17,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:42:17,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1294804738, now seen corresponding path program 4 times [2024-06-28 03:42:17,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:42:17,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207699282] [2024-06-28 03:42:17,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:42:17,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:42:17,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:42:19,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:42:19,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:42:19,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207699282] [2024-06-28 03:42:19,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207699282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:42:19,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:42:19,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:42:19,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838438005] [2024-06-28 03:42:19,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:42:19,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:42:19,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:42:19,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:42:19,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:42:20,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:42:20,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 173 transitions, 2073 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:42:20,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:42:20,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:42:20,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:42:21,328 INFO L124 PetriNetUnfolderBase]: 2740/4474 cut-off events. [2024-06-28 03:42:21,328 INFO L125 PetriNetUnfolderBase]: For 73522/73534 co-relation queries the response was YES. [2024-06-28 03:42:21,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24901 conditions, 4474 events. 2740/4474 cut-off events. For 73522/73534 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 26972 event pairs, 642 based on Foata normal form. 18/4481 useless extension candidates. Maximal degree in co-relation 24845. Up to 3227 conditions per place. [2024-06-28 03:42:21,358 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 129 selfloop transitions, 98 changer transitions 0/232 dead transitions. [2024-06-28 03:42:21,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 232 transitions, 2806 flow [2024-06-28 03:42:21,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:42:21,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:42:21,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-28 03:42:21,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-28 03:42:21,361 INFO L175 Difference]: Start difference. First operand has 123 places, 173 transitions, 2073 flow. Second operand 9 states and 178 transitions. [2024-06-28 03:42:21,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 232 transitions, 2806 flow [2024-06-28 03:42:21,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 232 transitions, 2600 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-28 03:42:21,442 INFO L231 Difference]: Finished difference. Result has 126 places, 178 transitions, 2167 flow [2024-06-28 03:42:21,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1867, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2167, PETRI_PLACES=126, PETRI_TRANSITIONS=178} [2024-06-28 03:42:21,443 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-28 03:42:21,443 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 178 transitions, 2167 flow [2024-06-28 03:42:21,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:42:21,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:42:21,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:42:21,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 03:42:21,443 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:42:21,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:42:21,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1401092872, now seen corresponding path program 5 times [2024-06-28 03:42:21,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:42:21,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007487052] [2024-06-28 03:42:21,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:42:21,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:42:21,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:42:23,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:42:23,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:42:23,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007487052] [2024-06-28 03:42:23,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007487052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:42:23,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:42:23,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:42:23,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322233624] [2024-06-28 03:42:23,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:42:23,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:42:23,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:42:23,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:42:23,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:42:23,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:42:23,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 178 transitions, 2167 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:42:23,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:42:23,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:42:23,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:42:24,735 INFO L124 PetriNetUnfolderBase]: 3363/5605 cut-off events. [2024-06-28 03:42:24,735 INFO L125 PetriNetUnfolderBase]: For 91637/91639 co-relation queries the response was YES. [2024-06-28 03:42:24,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30415 conditions, 5605 events. 3363/5605 cut-off events. For 91637/91639 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 36385 event pairs, 586 based on Foata normal form. 16/5616 useless extension candidates. Maximal degree in co-relation 30357. Up to 1903 conditions per place. [2024-06-28 03:42:24,775 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 132 selfloop transitions, 129 changer transitions 0/266 dead transitions. [2024-06-28 03:42:24,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 266 transitions, 3394 flow [2024-06-28 03:42:24,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:42:24,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:42:24,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-28 03:42:24,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-28 03:42:24,777 INFO L175 Difference]: Start difference. First operand has 126 places, 178 transitions, 2167 flow. Second operand 9 states and 183 transitions. [2024-06-28 03:42:24,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 266 transitions, 3394 flow [2024-06-28 03:42:24,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 266 transitions, 3147 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-28 03:42:24,866 INFO L231 Difference]: Finished difference. Result has 132 places, 200 transitions, 2591 flow [2024-06-28 03:42:24,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1948, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2591, PETRI_PLACES=132, PETRI_TRANSITIONS=200} [2024-06-28 03:42:24,867 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-28 03:42:24,867 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 200 transitions, 2591 flow [2024-06-28 03:42:24,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:42:24,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:42:24,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:42:24,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 03:42:24,868 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:42:24,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:42:24,868 INFO L85 PathProgramCache]: Analyzing trace with hash -559390694, now seen corresponding path program 6 times [2024-06-28 03:42:24,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:42:24,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465107795] [2024-06-28 03:42:24,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:42:24,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:42:24,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:42:26,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:42:26,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:42:26,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465107795] [2024-06-28 03:42:26,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465107795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:42:26,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:42:26,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:42:26,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473729372] [2024-06-28 03:42:26,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:42:26,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:42:26,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:42:26,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:42:26,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:42:26,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:42:26,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 200 transitions, 2591 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:42:26,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:42:26,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:42:26,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:42:28,401 INFO L124 PetriNetUnfolderBase]: 3827/6416 cut-off events. [2024-06-28 03:42:28,401 INFO L125 PetriNetUnfolderBase]: For 119042/119054 co-relation queries the response was YES. [2024-06-28 03:42:28,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36841 conditions, 6416 events. 3827/6416 cut-off events. For 119042/119054 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 43001 event pairs, 1187 based on Foata normal form. 20/6431 useless extension candidates. Maximal degree in co-relation 36779. Up to 4649 conditions per place. [2024-06-28 03:42:28,450 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 164 selfloop transitions, 124 changer transitions 0/293 dead transitions. [2024-06-28 03:42:28,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 293 transitions, 4067 flow [2024-06-28 03:42:28,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:42:28,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:42:28,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-28 03:42:28,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48677248677248675 [2024-06-28 03:42:28,464 INFO L175 Difference]: Start difference. First operand has 132 places, 200 transitions, 2591 flow. Second operand 9 states and 184 transitions. [2024-06-28 03:42:28,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 293 transitions, 4067 flow [2024-06-28 03:42:28,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 293 transitions, 3824 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-28 03:42:28,709 INFO L231 Difference]: Finished difference. Result has 138 places, 238 transitions, 3348 flow [2024-06-28 03:42:28,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2386, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3348, PETRI_PLACES=138, PETRI_TRANSITIONS=238} [2024-06-28 03:42:28,710 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 95 predicate places. [2024-06-28 03:42:28,710 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 238 transitions, 3348 flow [2024-06-28 03:42:28,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:42:28,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:42:28,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:42:28,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 03:42:28,710 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:42:28,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:42:28,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1506212788, now seen corresponding path program 7 times [2024-06-28 03:42:28,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:42:28,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612991874] [2024-06-28 03:42:28,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:42:28,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:42:28,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:42:31,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:42:31,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:42:31,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612991874] [2024-06-28 03:42:31,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612991874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:42:31,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:42:31,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:42:31,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370448522] [2024-06-28 03:42:31,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:42:31,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:42:31,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:42:31,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:42:31,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:42:31,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:42:31,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 238 transitions, 3348 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:42:31,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:42:31,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:42:31,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:42:33,266 INFO L124 PetriNetUnfolderBase]: 4057/6786 cut-off events. [2024-06-28 03:42:33,266 INFO L125 PetriNetUnfolderBase]: For 146329/146341 co-relation queries the response was YES. [2024-06-28 03:42:33,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40693 conditions, 6786 events. 4057/6786 cut-off events. For 146329/146341 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 45956 event pairs, 1251 based on Foata normal form. 52/6833 useless extension candidates. Maximal degree in co-relation 40628. Up to 5319 conditions per place. [2024-06-28 03:42:33,319 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 180 selfloop transitions, 113 changer transitions 0/298 dead transitions. [2024-06-28 03:42:33,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 298 transitions, 4312 flow [2024-06-28 03:42:33,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:42:33,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:42:33,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-28 03:42:33,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2024-06-28 03:42:33,321 INFO L175 Difference]: Start difference. First operand has 138 places, 238 transitions, 3348 flow. Second operand 10 states and 193 transitions. [2024-06-28 03:42:33,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 298 transitions, 4312 flow [2024-06-28 03:42:33,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 298 transitions, 4194 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-28 03:42:33,478 INFO L231 Difference]: Finished difference. Result has 145 places, 245 transitions, 3636 flow [2024-06-28 03:42:33,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3232, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3636, PETRI_PLACES=145, PETRI_TRANSITIONS=245} [2024-06-28 03:42:33,480 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-28 03:42:33,481 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 245 transitions, 3636 flow [2024-06-28 03:42:33,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:42:33,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:42:33,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:42:33,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 03:42:33,481 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:42:33,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:42:33,482 INFO L85 PathProgramCache]: Analyzing trace with hash 576688006, now seen corresponding path program 8 times [2024-06-28 03:42:33,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:42:33,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3049385] [2024-06-28 03:42:33,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:42:33,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:42:33,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:42:35,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:42:35,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:42:35,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3049385] [2024-06-28 03:42:35,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3049385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:42:35,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:42:35,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:42:35,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74316248] [2024-06-28 03:42:35,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:42:35,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:42:35,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:42:35,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:42:35,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:42:35,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:42:35,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 245 transitions, 3636 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:42:35,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:42:35,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:42:35,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:42:37,252 INFO L124 PetriNetUnfolderBase]: 4060/6828 cut-off events. [2024-06-28 03:42:37,252 INFO L125 PetriNetUnfolderBase]: For 149190/149210 co-relation queries the response was YES. [2024-06-28 03:42:37,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40946 conditions, 6828 events. 4060/6828 cut-off events. For 149190/149210 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 46605 event pairs, 1246 based on Foata normal form. 60/6883 useless extension candidates. Maximal degree in co-relation 40879. Up to 5332 conditions per place. [2024-06-28 03:42:37,310 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 176 selfloop transitions, 117 changer transitions 0/298 dead transitions. [2024-06-28 03:42:37,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 298 transitions, 4484 flow [2024-06-28 03:42:37,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:42:37,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:42:37,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-28 03:42:37,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-28 03:42:37,312 INFO L175 Difference]: Start difference. First operand has 145 places, 245 transitions, 3636 flow. Second operand 9 states and 179 transitions. [2024-06-28 03:42:37,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 298 transitions, 4484 flow [2024-06-28 03:42:37,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 298 transitions, 4220 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-28 03:42:37,476 INFO L231 Difference]: Finished difference. Result has 148 places, 248 transitions, 3707 flow [2024-06-28 03:42:37,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3372, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3707, PETRI_PLACES=148, PETRI_TRANSITIONS=248} [2024-06-28 03:42:37,478 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 105 predicate places. [2024-06-28 03:42:37,479 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 248 transitions, 3707 flow [2024-06-28 03:42:37,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:42:37,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:42:37,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:42:37,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 03:42:37,479 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:42:37,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:42:37,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1798259209, now seen corresponding path program 1 times [2024-06-28 03:42:37,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:42:37,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168051483] [2024-06-28 03:42:37,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:42:37,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:42:37,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:42:39,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:42:39,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:42:39,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168051483] [2024-06-28 03:42:39,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168051483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:42:39,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:42:39,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:42:39,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19993189] [2024-06-28 03:42:39,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:42:39,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:42:39,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:42:39,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:42:39,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:42:39,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:42:39,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 248 transitions, 3707 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:42:39,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:42:39,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:42:39,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:42:40,408 INFO L124 PetriNetUnfolderBase]: 3765/6371 cut-off events. [2024-06-28 03:42:40,408 INFO L125 PetriNetUnfolderBase]: For 143077/143194 co-relation queries the response was YES. [2024-06-28 03:42:40,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39220 conditions, 6371 events. 3765/6371 cut-off events. For 143077/143194 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 43714 event pairs, 1560 based on Foata normal form. 79/6400 useless extension candidates. Maximal degree in co-relation 39151. Up to 5795 conditions per place. [2024-06-28 03:42:40,465 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 236 selfloop transitions, 18 changer transitions 0/276 dead transitions. [2024-06-28 03:42:40,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 276 transitions, 4333 flow [2024-06-28 03:42:40,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:42:40,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:42:40,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-28 03:42:40,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-28 03:42:40,467 INFO L175 Difference]: Start difference. First operand has 148 places, 248 transitions, 3707 flow. Second operand 7 states and 128 transitions. [2024-06-28 03:42:40,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 276 transitions, 4333 flow [2024-06-28 03:42:40,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 276 transitions, 4051 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-28 03:42:40,676 INFO L231 Difference]: Finished difference. Result has 150 places, 253 transitions, 3537 flow [2024-06-28 03:42:40,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3429, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3537, PETRI_PLACES=150, PETRI_TRANSITIONS=253} [2024-06-28 03:42:40,677 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-28 03:42:40,677 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 253 transitions, 3537 flow [2024-06-28 03:42:40,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:42:40,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:42:40,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:42:40,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 03:42:40,678 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:42:40,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:42:40,678 INFO L85 PathProgramCache]: Analyzing trace with hash 768415488, now seen corresponding path program 9 times [2024-06-28 03:42:40,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:42:40,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077289116] [2024-06-28 03:42:40,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:42:40,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:42:40,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:42:42,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:42:42,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:42:42,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077289116] [2024-06-28 03:42:42,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077289116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:42:42,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:42:42,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:42:42,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322964929] [2024-06-28 03:42:42,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:42:42,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:42:42,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:42:42,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:42:42,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:42:43,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:42:43,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 253 transitions, 3537 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:42:43,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:42:43,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:42:43,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:42:44,992 INFO L124 PetriNetUnfolderBase]: 4407/7414 cut-off events. [2024-06-28 03:42:44,992 INFO L125 PetriNetUnfolderBase]: For 167072/167076 co-relation queries the response was YES. [2024-06-28 03:42:45,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43334 conditions, 7414 events. 4407/7414 cut-off events. For 167072/167076 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 51472 event pairs, 1411 based on Foata normal form. 70/7479 useless extension candidates. Maximal degree in co-relation 43263. Up to 5349 conditions per place. [2024-06-28 03:42:45,042 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 170 selfloop transitions, 124 changer transitions 0/299 dead transitions. [2024-06-28 03:42:45,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 299 transitions, 4449 flow [2024-06-28 03:42:45,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:42:45,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:42:45,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-28 03:42:45,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-28 03:42:45,044 INFO L175 Difference]: Start difference. First operand has 150 places, 253 transitions, 3537 flow. Second operand 8 states and 155 transitions. [2024-06-28 03:42:45,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 299 transitions, 4449 flow [2024-06-28 03:42:45,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 299 transitions, 4396 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-28 03:42:45,195 INFO L231 Difference]: Finished difference. Result has 154 places, 259 transitions, 3922 flow [2024-06-28 03:42:45,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3484, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3922, PETRI_PLACES=154, PETRI_TRANSITIONS=259} [2024-06-28 03:42:45,196 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-28 03:42:45,196 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 259 transitions, 3922 flow [2024-06-28 03:42:45,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:42:45,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:42:45,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:42:45,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 03:42:45,196 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:42:45,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:42:45,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1510093978, now seen corresponding path program 10 times [2024-06-28 03:42:45,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:42:45,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160640181] [2024-06-28 03:42:45,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:42:45,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:42:45,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:42:47,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:42:47,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:42:47,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160640181] [2024-06-28 03:42:47,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160640181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:42:47,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:42:47,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:42:47,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927681014] [2024-06-28 03:42:47,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:42:47,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:42:47,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:42:47,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:42:47,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:42:47,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:42:47,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 259 transitions, 3922 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:42:47,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:42:47,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:42:47,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:42:49,456 INFO L124 PetriNetUnfolderBase]: 4653/7873 cut-off events. [2024-06-28 03:42:49,456 INFO L125 PetriNetUnfolderBase]: For 182049/182049 co-relation queries the response was YES. [2024-06-28 03:42:49,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47188 conditions, 7873 events. 4653/7873 cut-off events. For 182049/182049 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 55622 event pairs, 1396 based on Foata normal form. 50/7918 useless extension candidates. Maximal degree in co-relation 47116. Up to 5209 conditions per place. [2024-06-28 03:42:49,523 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 164 selfloop transitions, 138 changer transitions 0/307 dead transitions. [2024-06-28 03:42:49,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 307 transitions, 4860 flow [2024-06-28 03:42:49,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:42:49,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:42:49,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-28 03:42:49,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-28 03:42:49,525 INFO L175 Difference]: Start difference. First operand has 154 places, 259 transitions, 3922 flow. Second operand 8 states and 158 transitions. [2024-06-28 03:42:49,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 307 transitions, 4860 flow [2024-06-28 03:42:49,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 307 transitions, 4566 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-28 03:42:49,729 INFO L231 Difference]: Finished difference. Result has 156 places, 264 transitions, 4082 flow [2024-06-28 03:42:49,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3628, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4082, PETRI_PLACES=156, PETRI_TRANSITIONS=264} [2024-06-28 03:42:49,729 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-28 03:42:49,729 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 264 transitions, 4082 flow [2024-06-28 03:42:49,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:42:49,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:42:49,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:42:49,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 03:42:49,730 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:42:49,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:42:49,730 INFO L85 PathProgramCache]: Analyzing trace with hash 47326592, now seen corresponding path program 11 times [2024-06-28 03:42:49,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:42:49,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052407531] [2024-06-28 03:42:49,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:42:49,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:42:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:42:51,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:42:51,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:42:51,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052407531] [2024-06-28 03:42:51,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052407531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:42:51,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:42:51,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:42:51,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298281618] [2024-06-28 03:42:51,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:42:51,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:42:51,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:42:51,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:42:51,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:42:51,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:42:51,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 264 transitions, 4082 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:42:51,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:42:51,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:42:51,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:42:53,902 INFO L124 PetriNetUnfolderBase]: 5129/8758 cut-off events. [2024-06-28 03:42:53,903 INFO L125 PetriNetUnfolderBase]: For 219193/219211 co-relation queries the response was YES. [2024-06-28 03:42:53,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52848 conditions, 8758 events. 5129/8758 cut-off events. For 219193/219211 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 63584 event pairs, 1335 based on Foata normal form. 68/8821 useless extension candidates. Maximal degree in co-relation 52775. Up to 5247 conditions per place. [2024-06-28 03:42:53,982 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 160 selfloop transitions, 158 changer transitions 0/323 dead transitions. [2024-06-28 03:42:53,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 323 transitions, 5362 flow [2024-06-28 03:42:53,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:42:53,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:42:53,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-28 03:42:54,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-28 03:42:54,000 INFO L175 Difference]: Start difference. First operand has 156 places, 264 transitions, 4082 flow. Second operand 8 states and 164 transitions. [2024-06-28 03:42:54,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 323 transitions, 5362 flow [2024-06-28 03:42:54,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 323 transitions, 5020 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-28 03:42:54,317 INFO L231 Difference]: Finished difference. Result has 158 places, 274 transitions, 4408 flow [2024-06-28 03:42:54,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3740, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4408, PETRI_PLACES=158, PETRI_TRANSITIONS=274} [2024-06-28 03:42:54,318 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-28 03:42:54,318 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 274 transitions, 4408 flow [2024-06-28 03:42:54,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:42:54,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:42:54,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:42:54,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 03:42:54,319 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:42:54,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:42:54,319 INFO L85 PathProgramCache]: Analyzing trace with hash 47474462, now seen corresponding path program 12 times [2024-06-28 03:42:54,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:42:54,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794909927] [2024-06-28 03:42:54,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:42:54,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:42:54,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:42:56,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:42:56,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:42:56,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794909927] [2024-06-28 03:42:56,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794909927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:42:56,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:42:56,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:42:56,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425061182] [2024-06-28 03:42:56,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:42:56,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:42:56,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:42:56,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:42:56,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:42:56,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:42:56,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 274 transitions, 4408 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:42:56,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:42:56,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:42:56,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:42:58,804 INFO L124 PetriNetUnfolderBase]: 5423/9315 cut-off events. [2024-06-28 03:42:58,804 INFO L125 PetriNetUnfolderBase]: For 242165/242183 co-relation queries the response was YES. [2024-06-28 03:42:58,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55908 conditions, 9315 events. 5423/9315 cut-off events. For 242165/242183 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 69209 event pairs, 1965 based on Foata normal form. 76/9386 useless extension candidates. Maximal degree in co-relation 55834. Up to 7161 conditions per place. [2024-06-28 03:42:58,886 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 190 selfloop transitions, 128 changer transitions 0/323 dead transitions. [2024-06-28 03:42:58,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 323 transitions, 5406 flow [2024-06-28 03:42:58,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:42:58,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:42:58,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-28 03:42:58,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-06-28 03:42:58,888 INFO L175 Difference]: Start difference. First operand has 158 places, 274 transitions, 4408 flow. Second operand 8 states and 159 transitions. [2024-06-28 03:42:58,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 323 transitions, 5406 flow [2024-06-28 03:42:59,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 323 transitions, 5179 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-28 03:42:59,217 INFO L231 Difference]: Finished difference. Result has 162 places, 279 transitions, 4641 flow [2024-06-28 03:42:59,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4181, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4641, PETRI_PLACES=162, PETRI_TRANSITIONS=279} [2024-06-28 03:42:59,217 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-28 03:42:59,218 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 279 transitions, 4641 flow [2024-06-28 03:42:59,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:42:59,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:42:59,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:42:59,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 03:42:59,218 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:42:59,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:42:59,219 INFO L85 PathProgramCache]: Analyzing trace with hash 52836842, now seen corresponding path program 13 times [2024-06-28 03:42:59,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:42:59,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745014625] [2024-06-28 03:42:59,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:42:59,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:42:59,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:43:01,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:43:01,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:43:01,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745014625] [2024-06-28 03:43:01,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745014625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:43:01,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:43:01,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:43:01,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811552812] [2024-06-28 03:43:01,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:43:01,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:43:01,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:43:01,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:43:01,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:43:01,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:43:01,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 279 transitions, 4641 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:43:01,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:43:01,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:43:01,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:43:04,370 INFO L124 PetriNetUnfolderBase]: 5664/9701 cut-off events. [2024-06-28 03:43:04,371 INFO L125 PetriNetUnfolderBase]: For 253111/253115 co-relation queries the response was YES. [2024-06-28 03:43:04,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58361 conditions, 9701 events. 5664/9701 cut-off events. For 253111/253115 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 72523 event pairs, 1968 based on Foata normal form. 72/9768 useless extension candidates. Maximal degree in co-relation 58285. Up to 7470 conditions per place. [2024-06-28 03:43:04,442 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 203 selfloop transitions, 123 changer transitions 0/331 dead transitions. [2024-06-28 03:43:04,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 331 transitions, 5657 flow [2024-06-28 03:43:04,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:43:04,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:43:04,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-28 03:43:04,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 03:43:04,443 INFO L175 Difference]: Start difference. First operand has 162 places, 279 transitions, 4641 flow. Second operand 9 states and 171 transitions. [2024-06-28 03:43:04,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 331 transitions, 5657 flow [2024-06-28 03:43:04,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 331 transitions, 5347 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-28 03:43:04,767 INFO L231 Difference]: Finished difference. Result has 165 places, 283 transitions, 4753 flow [2024-06-28 03:43:04,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4331, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4753, PETRI_PLACES=165, PETRI_TRANSITIONS=283} [2024-06-28 03:43:04,767 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-28 03:43:04,767 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 283 transitions, 4753 flow [2024-06-28 03:43:04,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:43:04,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:43:04,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:43:04,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 03:43:04,768 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:43:04,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:43:04,768 INFO L85 PathProgramCache]: Analyzing trace with hash -543536237, now seen corresponding path program 2 times [2024-06-28 03:43:04,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:43:04,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540215026] [2024-06-28 03:43:04,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:43:04,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:43:04,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:43:06,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:43:06,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:43:06,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540215026] [2024-06-28 03:43:06,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540215026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:43:06,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:43:06,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:43:06,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991526817] [2024-06-28 03:43:06,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:43:06,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:43:06,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:43:06,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:43:06,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:43:06,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:43:06,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 283 transitions, 4753 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:43:06,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:43:06,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:43:06,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:43:08,267 INFO L124 PetriNetUnfolderBase]: 5335/9135 cut-off events. [2024-06-28 03:43:08,267 INFO L125 PetriNetUnfolderBase]: For 232340/232497 co-relation queries the response was YES. [2024-06-28 03:43:08,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56252 conditions, 9135 events. 5335/9135 cut-off events. For 232340/232497 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 68476 event pairs, 2503 based on Foata normal form. 105/9135 useless extension candidates. Maximal degree in co-relation 56175. Up to 8420 conditions per place. [2024-06-28 03:43:08,334 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 262 selfloop transitions, 19 changer transitions 0/303 dead transitions. [2024-06-28 03:43:08,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 303 transitions, 5401 flow [2024-06-28 03:43:08,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:43:08,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:43:08,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-28 03:43:08,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-28 03:43:08,343 INFO L175 Difference]: Start difference. First operand has 165 places, 283 transitions, 4753 flow. Second operand 6 states and 109 transitions. [2024-06-28 03:43:08,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 303 transitions, 5401 flow [2024-06-28 03:43:08,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 303 transitions, 5084 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-28 03:43:08,636 INFO L231 Difference]: Finished difference. Result has 164 places, 286 transitions, 4527 flow [2024-06-28 03:43:08,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4436, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4527, PETRI_PLACES=164, PETRI_TRANSITIONS=286} [2024-06-28 03:43:08,637 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-28 03:43:08,637 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 286 transitions, 4527 flow [2024-06-28 03:43:08,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:43:08,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:43:08,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:43:08,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 03:43:08,638 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:43:08,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:43:08,638 INFO L85 PathProgramCache]: Analyzing trace with hash -2058958544, now seen corresponding path program 14 times [2024-06-28 03:43:08,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:43:08,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91670052] [2024-06-28 03:43:08,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:43:08,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:43:08,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:43:11,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:43:11,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:43:11,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91670052] [2024-06-28 03:43:11,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91670052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:43:11,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:43:11,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:43:11,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304966869] [2024-06-28 03:43:11,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:43:11,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:43:11,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:43:11,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:43:11,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:43:11,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:43:11,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 286 transitions, 4527 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:43:11,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:43:11,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:43:11,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:43:13,656 INFO L124 PetriNetUnfolderBase]: 5943/10162 cut-off events. [2024-06-28 03:43:13,656 INFO L125 PetriNetUnfolderBase]: For 255679/255687 co-relation queries the response was YES. [2024-06-28 03:43:13,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60204 conditions, 10162 events. 5943/10162 cut-off events. For 255679/255687 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 76797 event pairs, 2040 based on Foata normal form. 54/10186 useless extension candidates. Maximal degree in co-relation 60126. Up to 8371 conditions per place. [2024-06-28 03:43:13,750 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 208 selfloop transitions, 122 changer transitions 0/335 dead transitions. [2024-06-28 03:43:13,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 335 transitions, 5567 flow [2024-06-28 03:43:13,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:43:13,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:43:13,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-28 03:43:13,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-28 03:43:13,752 INFO L175 Difference]: Start difference. First operand has 164 places, 286 transitions, 4527 flow. Second operand 9 states and 169 transitions. [2024-06-28 03:43:13,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 335 transitions, 5567 flow [2024-06-28 03:43:14,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 335 transitions, 5506 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-28 03:43:14,127 INFO L231 Difference]: Finished difference. Result has 169 places, 290 transitions, 4885 flow [2024-06-28 03:43:14,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4466, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4885, PETRI_PLACES=169, PETRI_TRANSITIONS=290} [2024-06-28 03:43:14,128 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-28 03:43:14,128 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 290 transitions, 4885 flow [2024-06-28 03:43:14,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:43:14,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:43:14,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:43:14,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 03:43:14,129 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:43:14,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:43:14,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1861437440, now seen corresponding path program 15 times [2024-06-28 03:43:14,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:43:14,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706379518] [2024-06-28 03:43:14,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:43:14,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:43:14,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:43:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:43:16,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:43:16,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706379518] [2024-06-28 03:43:16,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706379518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:43:16,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:43:16,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:43:16,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007829323] [2024-06-28 03:43:16,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:43:16,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:43:16,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:43:16,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:43:16,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:43:16,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:43:16,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 290 transitions, 4885 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:43:16,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:43:16,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:43:16,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:43:19,377 INFO L124 PetriNetUnfolderBase]: 5838/10046 cut-off events. [2024-06-28 03:43:19,377 INFO L125 PetriNetUnfolderBase]: For 233434/233446 co-relation queries the response was YES. [2024-06-28 03:43:19,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58019 conditions, 10046 events. 5838/10046 cut-off events. For 233434/233446 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 76331 event pairs, 1960 based on Foata normal form. 58/10090 useless extension candidates. Maximal degree in co-relation 57940. Up to 8216 conditions per place. [2024-06-28 03:43:19,479 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 213 selfloop transitions, 124 changer transitions 0/342 dead transitions. [2024-06-28 03:43:19,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 342 transitions, 5818 flow [2024-06-28 03:43:19,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:43:19,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:43:19,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-28 03:43:19,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-28 03:43:19,481 INFO L175 Difference]: Start difference. First operand has 169 places, 290 transitions, 4885 flow. Second operand 10 states and 185 transitions. [2024-06-28 03:43:19,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 342 transitions, 5818 flow [2024-06-28 03:43:19,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 342 transitions, 5462 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-28 03:43:19,948 INFO L231 Difference]: Finished difference. Result has 172 places, 290 transitions, 4795 flow [2024-06-28 03:43:19,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4533, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4795, PETRI_PLACES=172, PETRI_TRANSITIONS=290} [2024-06-28 03:43:19,949 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 129 predicate places. [2024-06-28 03:43:19,949 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 290 transitions, 4795 flow [2024-06-28 03:43:19,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:43:19,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:43:19,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:43:19,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 03:43:19,950 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:43:19,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:43:19,950 INFO L85 PathProgramCache]: Analyzing trace with hash 711225291, now seen corresponding path program 1 times [2024-06-28 03:43:19,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:43:19,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939170155] [2024-06-28 03:43:19,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:43:19,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:43:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:43:22,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:43:22,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:43:22,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939170155] [2024-06-28 03:43:22,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939170155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:43:22,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:43:22,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:43:22,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494264930] [2024-06-28 03:43:22,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:43:22,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:43:22,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:43:22,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:43:22,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:43:22,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:43:22,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 290 transitions, 4795 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:43:22,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:43:22,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:43:22,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:43:25,070 INFO L124 PetriNetUnfolderBase]: 5908/10110 cut-off events. [2024-06-28 03:43:25,070 INFO L125 PetriNetUnfolderBase]: For 203068/203080 co-relation queries the response was YES. [2024-06-28 03:43:25,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57920 conditions, 10110 events. 5908/10110 cut-off events. For 203068/203080 co-relation queries the response was YES. Maximal size of possible extension queue 718. Compared 76560 event pairs, 1989 based on Foata normal form. 16/10092 useless extension candidates. Maximal degree in co-relation 57840. Up to 8676 conditions per place. [2024-06-28 03:43:25,162 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 203 selfloop transitions, 131 changer transitions 0/339 dead transitions. [2024-06-28 03:43:25,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 339 transitions, 5839 flow [2024-06-28 03:43:25,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:43:25,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:43:25,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-28 03:43:25,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-28 03:43:25,164 INFO L175 Difference]: Start difference. First operand has 172 places, 290 transitions, 4795 flow. Second operand 9 states and 164 transitions. [2024-06-28 03:43:25,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 339 transitions, 5839 flow [2024-06-28 03:43:25,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 339 transitions, 5470 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-28 03:43:25,520 INFO L231 Difference]: Finished difference. Result has 173 places, 301 transitions, 4935 flow [2024-06-28 03:43:25,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4438, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4935, PETRI_PLACES=173, PETRI_TRANSITIONS=301} [2024-06-28 03:43:25,520 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-28 03:43:25,521 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 301 transitions, 4935 flow [2024-06-28 03:43:25,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:43:25,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:43:25,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:43:25,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 03:43:25,521 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:43:25,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:43:25,522 INFO L85 PathProgramCache]: Analyzing trace with hash 987687833, now seen corresponding path program 2 times [2024-06-28 03:43:25,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:43:25,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534092517] [2024-06-28 03:43:25,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:43:25,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:43:25,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:43:28,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:43:28,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:43:28,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534092517] [2024-06-28 03:43:28,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534092517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:43:28,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:43:28,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:43:28,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924423411] [2024-06-28 03:43:28,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:43:28,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:43:28,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:43:28,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:43:28,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:43:28,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:43:28,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 301 transitions, 4935 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:43:28,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:43:28,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:43:28,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:43:30,667 INFO L124 PetriNetUnfolderBase]: 5956/10186 cut-off events. [2024-06-28 03:43:30,668 INFO L125 PetriNetUnfolderBase]: For 207484/207496 co-relation queries the response was YES. [2024-06-28 03:43:30,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58774 conditions, 10186 events. 5956/10186 cut-off events. For 207484/207496 co-relation queries the response was YES. Maximal size of possible extension queue 724. Compared 77102 event pairs, 1991 based on Foata normal form. 16/10168 useless extension candidates. Maximal degree in co-relation 58692. Up to 8752 conditions per place. [2024-06-28 03:43:30,765 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 207 selfloop transitions, 151 changer transitions 0/363 dead transitions. [2024-06-28 03:43:30,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 363 transitions, 6259 flow [2024-06-28 03:43:30,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:43:30,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:43:30,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-28 03:43:30,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-28 03:43:30,766 INFO L175 Difference]: Start difference. First operand has 173 places, 301 transitions, 4935 flow. Second operand 9 states and 164 transitions. [2024-06-28 03:43:30,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 363 transitions, 6259 flow [2024-06-28 03:43:31,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 363 transitions, 5875 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-28 03:43:31,156 INFO L231 Difference]: Finished difference. Result has 177 places, 325 transitions, 5354 flow [2024-06-28 03:43:31,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4589, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5354, PETRI_PLACES=177, PETRI_TRANSITIONS=325} [2024-06-28 03:43:31,156 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-28 03:43:31,157 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 325 transitions, 5354 flow [2024-06-28 03:43:31,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:43:31,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:43:31,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:43:31,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 03:43:31,157 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:43:31,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:43:31,158 INFO L85 PathProgramCache]: Analyzing trace with hash 786598583, now seen corresponding path program 3 times [2024-06-28 03:43:31,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:43:31,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054784675] [2024-06-28 03:43:31,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:43:31,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:43:31,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:43:34,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:43:34,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:43:34,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054784675] [2024-06-28 03:43:34,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054784675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:43:34,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:43:34,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:43:34,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313914620] [2024-06-28 03:43:34,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:43:34,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:43:34,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:43:34,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:43:34,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:43:34,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:43:34,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 325 transitions, 5354 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:43:34,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:43:34,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:43:34,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:43:36,859 INFO L124 PetriNetUnfolderBase]: 5938/10154 cut-off events. [2024-06-28 03:43:36,859 INFO L125 PetriNetUnfolderBase]: For 210821/210829 co-relation queries the response was YES. [2024-06-28 03:43:36,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58936 conditions, 10154 events. 5938/10154 cut-off events. For 210821/210829 co-relation queries the response was YES. Maximal size of possible extension queue 724. Compared 76807 event pairs, 2008 based on Foata normal form. 12/10132 useless extension candidates. Maximal degree in co-relation 58852. Up to 8726 conditions per place. [2024-06-28 03:43:36,968 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 213 selfloop transitions, 148 changer transitions 0/366 dead transitions. [2024-06-28 03:43:36,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 366 transitions, 6365 flow [2024-06-28 03:43:36,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:43:36,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:43:36,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-28 03:43:36,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-28 03:43:36,970 INFO L175 Difference]: Start difference. First operand has 177 places, 325 transitions, 5354 flow. Second operand 9 states and 164 transitions. [2024-06-28 03:43:36,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 366 transitions, 6365 flow [2024-06-28 03:43:37,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 366 transitions, 6026 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-28 03:43:37,513 INFO L231 Difference]: Finished difference. Result has 183 places, 330 transitions, 5484 flow [2024-06-28 03:43:37,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5025, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5484, PETRI_PLACES=183, PETRI_TRANSITIONS=330} [2024-06-28 03:43:37,514 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-28 03:43:37,514 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 330 transitions, 5484 flow [2024-06-28 03:43:37,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:43:37,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:43:37,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:43:37,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 03:43:37,515 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:43:37,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:43:37,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1857385043, now seen corresponding path program 4 times [2024-06-28 03:43:37,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:43:37,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602028456] [2024-06-28 03:43:37,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:43:37,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:43:37,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:43:40,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:43:40,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:43:40,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602028456] [2024-06-28 03:43:40,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602028456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:43:40,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:43:40,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:43:40,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618107814] [2024-06-28 03:43:40,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:43:40,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:43:40,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:43:40,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:43:40,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:43:40,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:43:40,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 330 transitions, 5484 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:43:40,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:43:40,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:43:40,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:43:42,457 INFO L124 PetriNetUnfolderBase]: 6046/10357 cut-off events. [2024-06-28 03:43:42,458 INFO L125 PetriNetUnfolderBase]: For 210712/210724 co-relation queries the response was YES. [2024-06-28 03:43:42,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59067 conditions, 10357 events. 6046/10357 cut-off events. For 210712/210724 co-relation queries the response was YES. Maximal size of possible extension queue 741. Compared 78688 event pairs, 1867 based on Foata normal form. 12/10337 useless extension candidates. Maximal degree in co-relation 58981. Up to 8184 conditions per place. [2024-06-28 03:43:42,583 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 205 selfloop transitions, 171 changer transitions 0/381 dead transitions. [2024-06-28 03:43:42,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 381 transitions, 6572 flow [2024-06-28 03:43:42,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:43:42,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:43:42,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-28 03:43:42,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-28 03:43:42,587 INFO L175 Difference]: Start difference. First operand has 183 places, 330 transitions, 5484 flow. Second operand 9 states and 168 transitions. [2024-06-28 03:43:42,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 381 transitions, 6572 flow [2024-06-28 03:43:43,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 381 transitions, 6182 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-28 03:43:43,073 INFO L231 Difference]: Finished difference. Result has 187 places, 338 transitions, 5660 flow [2024-06-28 03:43:43,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5094, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5660, PETRI_PLACES=187, PETRI_TRANSITIONS=338} [2024-06-28 03:43:43,076 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-28 03:43:43,076 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 338 transitions, 5660 flow [2024-06-28 03:43:43,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:43:43,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:43:43,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:43:43,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 03:43:43,076 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:43:43,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:43:43,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1180350017, now seen corresponding path program 3 times [2024-06-28 03:43:43,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:43:43,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252845168] [2024-06-28 03:43:43,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:43:43,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:43:43,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:43:45,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:43:45,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:43:45,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252845168] [2024-06-28 03:43:45,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252845168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:43:45,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:43:45,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:43:45,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490324521] [2024-06-28 03:43:45,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:43:45,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:43:45,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:43:45,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:43:45,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:43:45,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:43:45,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 338 transitions, 5660 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:43:45,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:43:45,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:43:45,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:43:47,123 INFO L124 PetriNetUnfolderBase]: 5708/9821 cut-off events. [2024-06-28 03:43:47,123 INFO L125 PetriNetUnfolderBase]: For 228824/229007 co-relation queries the response was YES. [2024-06-28 03:43:47,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57434 conditions, 9821 events. 5708/9821 cut-off events. For 228824/229007 co-relation queries the response was YES. Maximal size of possible extension queue 737. Compared 75501 event pairs, 2894 based on Foata normal form. 136/9847 useless extension candidates. Maximal degree in co-relation 57346. Up to 9092 conditions per place. [2024-06-28 03:43:47,224 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 317 selfloop transitions, 12 changer transitions 0/351 dead transitions. [2024-06-28 03:43:47,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 351 transitions, 6390 flow [2024-06-28 03:43:47,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:43:47,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:43:47,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-28 03:43:47,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-28 03:43:47,226 INFO L175 Difference]: Start difference. First operand has 187 places, 338 transitions, 5660 flow. Second operand 6 states and 101 transitions. [2024-06-28 03:43:47,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 351 transitions, 6390 flow [2024-06-28 03:43:47,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 351 transitions, 6046 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-28 03:43:47,743 INFO L231 Difference]: Finished difference. Result has 187 places, 341 transitions, 5396 flow [2024-06-28 03:43:47,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5316, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5396, PETRI_PLACES=187, PETRI_TRANSITIONS=341} [2024-06-28 03:43:47,745 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-28 03:43:47,745 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 341 transitions, 5396 flow [2024-06-28 03:43:47,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:43:47,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:43:47,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:43:47,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 03:43:47,746 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:43:47,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:43:47,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1769258131, now seen corresponding path program 1 times [2024-06-28 03:43:47,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:43:47,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162205018] [2024-06-28 03:43:47,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:43:47,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:43:47,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:43:49,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:43:49,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:43:49,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162205018] [2024-06-28 03:43:49,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162205018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:43:49,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:43:49,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:43:49,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437859487] [2024-06-28 03:43:49,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:43:49,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:43:49,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:43:49,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:43:49,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:43:49,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:43:49,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 341 transitions, 5396 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-28 03:43:49,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:43:49,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:43:49,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:43:51,185 INFO L124 PetriNetUnfolderBase]: 6048/10402 cut-off events. [2024-06-28 03:43:51,185 INFO L125 PetriNetUnfolderBase]: For 217927/217927 co-relation queries the response was YES. [2024-06-28 03:43:51,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58858 conditions, 10402 events. 6048/10402 cut-off events. For 217927/217927 co-relation queries the response was YES. Maximal size of possible extension queue 736. Compared 79215 event pairs, 3151 based on Foata normal form. 1/10402 useless extension candidates. Maximal degree in co-relation 58769. Up to 9718 conditions per place. [2024-06-28 03:43:51,278 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 340 selfloop transitions, 13 changer transitions 0/358 dead transitions. [2024-06-28 03:43:51,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 358 transitions, 6174 flow [2024-06-28 03:43:51,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:43:51,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:43:51,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-28 03:43:51,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3707482993197279 [2024-06-28 03:43:51,280 INFO L175 Difference]: Start difference. First operand has 187 places, 341 transitions, 5396 flow. Second operand 7 states and 109 transitions. [2024-06-28 03:43:51,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 358 transitions, 6174 flow [2024-06-28 03:43:51,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 358 transitions, 6116 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-28 03:43:51,748 INFO L231 Difference]: Finished difference. Result has 190 places, 344 transitions, 5406 flow [2024-06-28 03:43:51,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5338, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5406, PETRI_PLACES=190, PETRI_TRANSITIONS=344} [2024-06-28 03:43:51,749 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-28 03:43:51,749 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 344 transitions, 5406 flow [2024-06-28 03:43:51,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-28 03:43:51,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:43:51,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:43:51,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 03:43:51,749 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:43:51,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:43:51,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1180344065, now seen corresponding path program 2 times [2024-06-28 03:43:51,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:43:51,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791053074] [2024-06-28 03:43:51,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:43:51,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:43:51,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:43:53,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:43:53,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:43:53,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791053074] [2024-06-28 03:43:53,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791053074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:43:53,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:43:53,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:43:53,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293678610] [2024-06-28 03:43:53,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:43:53,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:43:53,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:43:53,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:43:53,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:43:53,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:43:53,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 344 transitions, 5406 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-28 03:43:53,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:43:53,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:43:53,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:43:55,101 INFO L124 PetriNetUnfolderBase]: 6045/10399 cut-off events. [2024-06-28 03:43:55,101 INFO L125 PetriNetUnfolderBase]: For 222761/222764 co-relation queries the response was YES. [2024-06-28 03:43:55,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59137 conditions, 10399 events. 6045/10399 cut-off events. For 222761/222764 co-relation queries the response was YES. Maximal size of possible extension queue 736. Compared 79188 event pairs, 3156 based on Foata normal form. 3/10400 useless extension candidates. Maximal degree in co-relation 59047. Up to 9708 conditions per place. [2024-06-28 03:43:55,226 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 335 selfloop transitions, 17 changer transitions 0/357 dead transitions. [2024-06-28 03:43:55,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 357 transitions, 6174 flow [2024-06-28 03:43:55,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:43:55,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:43:55,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-28 03:43:55,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-28 03:43:55,256 INFO L175 Difference]: Start difference. First operand has 190 places, 344 transitions, 5406 flow. Second operand 6 states and 98 transitions. [2024-06-28 03:43:55,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 357 transitions, 6174 flow [2024-06-28 03:43:55,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 357 transitions, 6096 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-28 03:43:55,775 INFO L231 Difference]: Finished difference. Result has 191 places, 347 transitions, 5410 flow [2024-06-28 03:43:55,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5328, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5410, PETRI_PLACES=191, PETRI_TRANSITIONS=347} [2024-06-28 03:43:55,776 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-28 03:43:55,776 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 347 transitions, 5410 flow [2024-06-28 03:43:55,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-28 03:43:55,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:43:55,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:43:55,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 03:43:55,776 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:43:55,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:43:55,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1180335137, now seen corresponding path program 1 times [2024-06-28 03:43:55,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:43:55,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262839262] [2024-06-28 03:43:55,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:43:55,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:43:55,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:43:58,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:43:58,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:43:58,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262839262] [2024-06-28 03:43:58,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262839262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:43:58,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:43:58,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:43:58,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644691444] [2024-06-28 03:43:58,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:43:58,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:43:58,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:43:58,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:43:58,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:43:58,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:43:58,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 347 transitions, 5410 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:43:58,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:43:58,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:43:58,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:44:00,022 INFO L124 PetriNetUnfolderBase]: 5710/9822 cut-off events. [2024-06-28 03:44:00,022 INFO L125 PetriNetUnfolderBase]: For 241597/241780 co-relation queries the response was YES. [2024-06-28 03:44:00,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56937 conditions, 9822 events. 5710/9822 cut-off events. For 241597/241780 co-relation queries the response was YES. Maximal size of possible extension queue 737. Compared 75445 event pairs, 2892 based on Foata normal form. 137/9849 useless extension candidates. Maximal degree in co-relation 56847. Up to 9081 conditions per place. [2024-06-28 03:44:00,111 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 323 selfloop transitions, 14 changer transitions 0/361 dead transitions. [2024-06-28 03:44:00,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 361 transitions, 6152 flow [2024-06-28 03:44:00,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:44:00,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:44:00,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-28 03:44:00,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-06-28 03:44:00,114 INFO L175 Difference]: Start difference. First operand has 191 places, 347 transitions, 5410 flow. Second operand 7 states and 114 transitions. [2024-06-28 03:44:00,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 361 transitions, 6152 flow [2024-06-28 03:44:00,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 361 transitions, 6092 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-28 03:44:00,564 INFO L231 Difference]: Finished difference. Result has 194 places, 349 transitions, 5423 flow [2024-06-28 03:44:00,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5350, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5423, PETRI_PLACES=194, PETRI_TRANSITIONS=349} [2024-06-28 03:44:00,565 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-28 03:44:00,565 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 349 transitions, 5423 flow [2024-06-28 03:44:00,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:44:00,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:44:00,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:44:00,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 03:44:00,570 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:44:00,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:44:00,570 INFO L85 PathProgramCache]: Analyzing trace with hash 965376288, now seen corresponding path program 1 times [2024-06-28 03:44:00,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:44:00,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804431528] [2024-06-28 03:44:00,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:44:00,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:44:00,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:44:02,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:44:02,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:44:02,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804431528] [2024-06-28 03:44:02,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804431528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:44:02,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:44:02,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:44:02,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689885449] [2024-06-28 03:44:02,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:44:02,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:44:02,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:44:02,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:44:02,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:44:02,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:44:02,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 349 transitions, 5423 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:44:02,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:44:02,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:44:02,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:44:04,743 INFO L124 PetriNetUnfolderBase]: 6068/10445 cut-off events. [2024-06-28 03:44:04,744 INFO L125 PetriNetUnfolderBase]: For 232516/232554 co-relation queries the response was YES. [2024-06-28 03:44:04,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59765 conditions, 10445 events. 6068/10445 cut-off events. For 232516/232554 co-relation queries the response was YES. Maximal size of possible extension queue 732. Compared 79672 event pairs, 2206 based on Foata normal form. 39/10482 useless extension candidates. Maximal degree in co-relation 59674. Up to 9514 conditions per place. [2024-06-28 03:44:04,828 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 328 selfloop transitions, 59 changer transitions 0/392 dead transitions. [2024-06-28 03:44:04,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 392 transitions, 6442 flow [2024-06-28 03:44:04,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:44:04,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:44:04,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-28 03:44:04,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-28 03:44:04,830 INFO L175 Difference]: Start difference. First operand has 194 places, 349 transitions, 5423 flow. Second operand 8 states and 148 transitions. [2024-06-28 03:44:04,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 392 transitions, 6442 flow [2024-06-28 03:44:05,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 392 transitions, 6385 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-28 03:44:05,360 INFO L231 Difference]: Finished difference. Result has 198 places, 360 transitions, 5671 flow [2024-06-28 03:44:05,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5366, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5671, PETRI_PLACES=198, PETRI_TRANSITIONS=360} [2024-06-28 03:44:05,361 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-28 03:44:05,361 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 360 transitions, 5671 flow [2024-06-28 03:44:05,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:44:05,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:44:05,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:44:05,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 03:44:05,362 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:44:05,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:44:05,362 INFO L85 PathProgramCache]: Analyzing trace with hash 88212454, now seen corresponding path program 2 times [2024-06-28 03:44:05,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:44:05,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115523828] [2024-06-28 03:44:05,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:44:05,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:44:05,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:44:07,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:44:07,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:44:07,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115523828] [2024-06-28 03:44:07,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115523828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:44:07,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:44:07,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:44:07,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579420992] [2024-06-28 03:44:07,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:44:07,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:44:07,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:44:07,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:44:07,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:44:07,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:44:07,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 360 transitions, 5671 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:44:07,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:44:07,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:44:07,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:44:09,596 INFO L124 PetriNetUnfolderBase]: 6088/10465 cut-off events. [2024-06-28 03:44:09,597 INFO L125 PetriNetUnfolderBase]: For 240484/240507 co-relation queries the response was YES. [2024-06-28 03:44:09,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61080 conditions, 10465 events. 6088/10465 cut-off events. For 240484/240507 co-relation queries the response was YES. Maximal size of possible extension queue 731. Compared 79686 event pairs, 2141 based on Foata normal form. 24/10487 useless extension candidates. Maximal degree in co-relation 60987. Up to 9538 conditions per place. [2024-06-28 03:44:09,707 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 333 selfloop transitions, 62 changer transitions 0/400 dead transitions. [2024-06-28 03:44:09,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 400 transitions, 6706 flow [2024-06-28 03:44:09,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:44:09,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:44:09,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-28 03:44:09,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-28 03:44:09,709 INFO L175 Difference]: Start difference. First operand has 198 places, 360 transitions, 5671 flow. Second operand 8 states and 147 transitions. [2024-06-28 03:44:09,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 400 transitions, 6706 flow [2024-06-28 03:44:10,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 400 transitions, 6503 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-28 03:44:10,526 INFO L231 Difference]: Finished difference. Result has 202 places, 371 transitions, 5800 flow [2024-06-28 03:44:10,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5518, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5800, PETRI_PLACES=202, PETRI_TRANSITIONS=371} [2024-06-28 03:44:10,527 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 159 predicate places. [2024-06-28 03:44:10,527 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 371 transitions, 5800 flow [2024-06-28 03:44:10,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:44:10,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:44:10,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:44:10,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 03:44:10,528 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:44:10,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:44:10,528 INFO L85 PathProgramCache]: Analyzing trace with hash 16257126, now seen corresponding path program 1 times [2024-06-28 03:44:10,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:44:10,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570780391] [2024-06-28 03:44:10,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:44:10,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:44:10,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:44:13,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:44:13,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:44:13,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570780391] [2024-06-28 03:44:13,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570780391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:44:13,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:44:13,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:44:13,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880674390] [2024-06-28 03:44:13,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:44:13,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:44:13,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:44:13,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:44:13,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:44:13,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:44:13,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 371 transitions, 5800 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:44:13,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:44:13,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:44:13,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:44:16,814 INFO L124 PetriNetUnfolderBase]: 6089/10478 cut-off events. [2024-06-28 03:44:16,814 INFO L125 PetriNetUnfolderBase]: For 255028/255028 co-relation queries the response was YES. [2024-06-28 03:44:16,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61109 conditions, 10478 events. 6089/10478 cut-off events. For 255028/255028 co-relation queries the response was YES. Maximal size of possible extension queue 737. Compared 80190 event pairs, 1920 based on Foata normal form. 24/10497 useless extension candidates. Maximal degree in co-relation 61014. Up to 8279 conditions per place. [2024-06-28 03:44:16,944 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 296 selfloop transitions, 149 changer transitions 0/450 dead transitions. [2024-06-28 03:44:16,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 450 transitions, 7185 flow [2024-06-28 03:44:16,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 03:44:16,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 03:44:16,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 241 transitions. [2024-06-28 03:44:16,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4413919413919414 [2024-06-28 03:44:16,947 INFO L175 Difference]: Start difference. First operand has 202 places, 371 transitions, 5800 flow. Second operand 13 states and 241 transitions. [2024-06-28 03:44:16,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 450 transitions, 7185 flow [2024-06-28 03:44:17,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 450 transitions, 7042 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-28 03:44:17,740 INFO L231 Difference]: Finished difference. Result has 214 places, 381 transitions, 6219 flow [2024-06-28 03:44:17,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5661, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6219, PETRI_PLACES=214, PETRI_TRANSITIONS=381} [2024-06-28 03:44:17,741 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-28 03:44:17,741 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 381 transitions, 6219 flow [2024-06-28 03:44:17,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:44:17,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:44:17,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:44:17,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 03:44:17,741 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:44:17,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:44:17,742 INFO L85 PathProgramCache]: Analyzing trace with hash 631009555, now seen corresponding path program 1 times [2024-06-28 03:44:17,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:44:17,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4927829] [2024-06-28 03:44:17,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:44:17,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:44:17,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:44:20,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:44:20,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:44:20,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4927829] [2024-06-28 03:44:20,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4927829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:44:20,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:44:20,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:44:20,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6059164] [2024-06-28 03:44:20,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:44:20,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:44:20,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:44:20,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:44:20,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:44:20,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:44:20,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 381 transitions, 6219 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:44:20,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:44:20,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:44:20,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:44:22,224 INFO L124 PetriNetUnfolderBase]: 5931/10222 cut-off events. [2024-06-28 03:44:22,225 INFO L125 PetriNetUnfolderBase]: For 296275/296401 co-relation queries the response was YES. [2024-06-28 03:44:22,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63250 conditions, 10222 events. 5931/10222 cut-off events. For 296275/296401 co-relation queries the response was YES. Maximal size of possible extension queue 752. Compared 79187 event pairs, 2386 based on Foata normal form. 93/10211 useless extension candidates. Maximal degree in co-relation 63152. Up to 7884 conditions per place. [2024-06-28 03:44:22,350 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 185 selfloop transitions, 202 changer transitions 0/418 dead transitions. [2024-06-28 03:44:22,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 418 transitions, 7333 flow [2024-06-28 03:44:22,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:44:22,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:44:22,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 03:44:22,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-28 03:44:22,351 INFO L175 Difference]: Start difference. First operand has 214 places, 381 transitions, 6219 flow. Second operand 8 states and 149 transitions. [2024-06-28 03:44:22,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 418 transitions, 7333 flow [2024-06-28 03:44:22,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 418 transitions, 6968 flow, removed 45 selfloop flow, removed 8 redundant places. [2024-06-28 03:44:22,997 INFO L231 Difference]: Finished difference. Result has 215 places, 391 transitions, 6639 flow [2024-06-28 03:44:22,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5854, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6639, PETRI_PLACES=215, PETRI_TRANSITIONS=391} [2024-06-28 03:44:22,997 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-28 03:44:22,998 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 391 transitions, 6639 flow [2024-06-28 03:44:22,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:44:22,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:44:22,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:44:22,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 03:44:22,998 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:44:22,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:44:22,999 INFO L85 PathProgramCache]: Analyzing trace with hash 109799614, now seen corresponding path program 3 times [2024-06-28 03:44:22,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:44:22,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237825596] [2024-06-28 03:44:22,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:44:22,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:44:23,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:44:25,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:44:25,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:44:25,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237825596] [2024-06-28 03:44:25,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237825596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:44:25,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:44:25,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:44:25,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612148949] [2024-06-28 03:44:25,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:44:25,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:44:25,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:44:25,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:44:25,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:44:25,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:44:25,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 391 transitions, 6639 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:44:25,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:44:25,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:44:25,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:44:27,616 INFO L124 PetriNetUnfolderBase]: 6349/10864 cut-off events. [2024-06-28 03:44:27,617 INFO L125 PetriNetUnfolderBase]: For 310616/310627 co-relation queries the response was YES. [2024-06-28 03:44:27,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68996 conditions, 10864 events. 6349/10864 cut-off events. For 310616/310627 co-relation queries the response was YES. Maximal size of possible extension queue 759. Compared 82802 event pairs, 2172 based on Foata normal form. 14/10876 useless extension candidates. Maximal degree in co-relation 68896. Up to 9817 conditions per place. [2024-06-28 03:44:27,910 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 359 selfloop transitions, 69 changer transitions 0/433 dead transitions. [2024-06-28 03:44:27,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 433 transitions, 7965 flow [2024-06-28 03:44:27,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:44:27,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:44:27,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 03:44:27,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-28 03:44:27,911 INFO L175 Difference]: Start difference. First operand has 215 places, 391 transitions, 6639 flow. Second operand 8 states and 145 transitions. [2024-06-28 03:44:27,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 433 transitions, 7965 flow [2024-06-28 03:44:28,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 433 transitions, 7879 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-28 03:44:28,765 INFO L231 Difference]: Finished difference. Result has 219 places, 403 transitions, 6947 flow [2024-06-28 03:44:28,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6553, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6947, PETRI_PLACES=219, PETRI_TRANSITIONS=403} [2024-06-28 03:44:28,765 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-28 03:44:28,765 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 403 transitions, 6947 flow [2024-06-28 03:44:28,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:44:28,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:44:28,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:44:28,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 03:44:28,766 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:44:28,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:44:28,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1607141442, now seen corresponding path program 4 times [2024-06-28 03:44:28,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:44:28,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841686998] [2024-06-28 03:44:28,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:44:28,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:44:28,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:44:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:44:30,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:44:30,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841686998] [2024-06-28 03:44:30,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841686998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:44:30,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:44:30,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:44:30,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296202650] [2024-06-28 03:44:30,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:44:30,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:44:30,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:44:30,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:44:30,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:44:30,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:44:30,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 403 transitions, 6947 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:44:30,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:44:30,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:44:30,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:44:33,370 INFO L124 PetriNetUnfolderBase]: 6504/11095 cut-off events. [2024-06-28 03:44:33,370 INFO L125 PetriNetUnfolderBase]: For 346510/346535 co-relation queries the response was YES. [2024-06-28 03:44:33,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72901 conditions, 11095 events. 6504/11095 cut-off events. For 346510/346535 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 84633 event pairs, 2079 based on Foata normal form. 26/11119 useless extension candidates. Maximal degree in co-relation 72799. Up to 8514 conditions per place. [2024-06-28 03:44:33,494 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 203 selfloop transitions, 254 changer transitions 0/462 dead transitions. [2024-06-28 03:44:33,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 462 transitions, 8661 flow [2024-06-28 03:44:33,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:44:33,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:44:33,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-28 03:44:33,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-28 03:44:33,496 INFO L175 Difference]: Start difference. First operand has 219 places, 403 transitions, 6947 flow. Second operand 9 states and 165 transitions. [2024-06-28 03:44:33,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 462 transitions, 8661 flow [2024-06-28 03:44:34,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 462 transitions, 8518 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-28 03:44:34,446 INFO L231 Difference]: Finished difference. Result has 226 places, 429 transitions, 8064 flow [2024-06-28 03:44:34,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6832, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8064, PETRI_PLACES=226, PETRI_TRANSITIONS=429} [2024-06-28 03:44:34,447 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-28 03:44:34,447 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 429 transitions, 8064 flow [2024-06-28 03:44:34,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:44:34,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:44:34,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:44:34,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 03:44:34,453 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:44:34,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:44:34,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1644623808, now seen corresponding path program 2 times [2024-06-28 03:44:34,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:44:34,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614327229] [2024-06-28 03:44:34,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:44:34,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:44:34,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:44:37,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:44:37,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:44:37,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614327229] [2024-06-28 03:44:37,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614327229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:44:37,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:44:37,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:44:37,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604428124] [2024-06-28 03:44:37,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:44:37,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:44:37,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:44:37,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:44:37,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:44:37,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:44:37,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 429 transitions, 8064 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:44:37,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:44:37,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:44:37,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:44:40,990 INFO L124 PetriNetUnfolderBase]: 6736/11574 cut-off events. [2024-06-28 03:44:40,991 INFO L125 PetriNetUnfolderBase]: For 426858/426858 co-relation queries the response was YES. [2024-06-28 03:44:41,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79526 conditions, 11574 events. 6736/11574 cut-off events. For 426858/426858 co-relation queries the response was YES. Maximal size of possible extension queue 819. Compared 89984 event pairs, 2084 based on Foata normal form. 24/11593 useless extension candidates. Maximal degree in co-relation 79420. Up to 8463 conditions per place. [2024-06-28 03:44:41,134 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 330 selfloop transitions, 172 changer transitions 0/507 dead transitions. [2024-06-28 03:44:41,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 507 transitions, 9761 flow [2024-06-28 03:44:41,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 03:44:41,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 03:44:41,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 219 transitions. [2024-06-28 03:44:41,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-28 03:44:41,136 INFO L175 Difference]: Start difference. First operand has 226 places, 429 transitions, 8064 flow. Second operand 12 states and 219 transitions. [2024-06-28 03:44:41,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 507 transitions, 9761 flow [2024-06-28 03:44:42,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 507 transitions, 9453 flow, removed 100 selfloop flow, removed 5 redundant places. [2024-06-28 03:44:42,405 INFO L231 Difference]: Finished difference. Result has 235 places, 443 transitions, 8566 flow [2024-06-28 03:44:42,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7774, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8566, PETRI_PLACES=235, PETRI_TRANSITIONS=443} [2024-06-28 03:44:42,405 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-28 03:44:42,405 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 443 transitions, 8566 flow [2024-06-28 03:44:42,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:44:42,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:44:42,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:44:42,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 03:44:42,406 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:44:42,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:44:42,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1680071552, now seen corresponding path program 5 times [2024-06-28 03:44:42,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:44:42,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958246571] [2024-06-28 03:44:42,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:44:42,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:44:42,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:44:44,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:44:44,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:44:44,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958246571] [2024-06-28 03:44:44,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958246571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:44:44,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:44:44,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:44:44,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201811717] [2024-06-28 03:44:44,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:44:44,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:44:44,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:44:44,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:44:44,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:44:44,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:44:44,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 443 transitions, 8566 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:44:44,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:44:44,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:44:44,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:44:47,340 INFO L124 PetriNetUnfolderBase]: 6740/11558 cut-off events. [2024-06-28 03:44:47,341 INFO L125 PetriNetUnfolderBase]: For 407501/407512 co-relation queries the response was YES. [2024-06-28 03:44:47,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79915 conditions, 11558 events. 6740/11558 cut-off events. For 407501/407512 co-relation queries the response was YES. Maximal size of possible extension queue 812. Compared 89347 event pairs, 2335 based on Foata normal form. 12/11568 useless extension candidates. Maximal degree in co-relation 79806. Up to 10443 conditions per place. [2024-06-28 03:44:47,455 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 384 selfloop transitions, 86 changer transitions 0/475 dead transitions. [2024-06-28 03:44:47,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 475 transitions, 9925 flow [2024-06-28 03:44:47,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:44:47,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:44:47,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-28 03:44:47,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-28 03:44:47,456 INFO L175 Difference]: Start difference. First operand has 235 places, 443 transitions, 8566 flow. Second operand 7 states and 123 transitions. [2024-06-28 03:44:47,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 475 transitions, 9925 flow [2024-06-28 03:44:48,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 475 transitions, 9472 flow, removed 56 selfloop flow, removed 10 redundant places. [2024-06-28 03:44:48,697 INFO L231 Difference]: Finished difference. Result has 233 places, 456 transitions, 8632 flow [2024-06-28 03:44:48,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8115, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8632, PETRI_PLACES=233, PETRI_TRANSITIONS=456} [2024-06-28 03:44:48,697 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-28 03:44:48,697 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 456 transitions, 8632 flow [2024-06-28 03:44:48,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:44:48,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:44:48,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:44:48,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 03:44:48,698 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:44:48,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:44:48,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1680071955, now seen corresponding path program 2 times [2024-06-28 03:44:48,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:44:48,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573065420] [2024-06-28 03:44:48,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:44:48,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:44:48,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:44:50,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:44:50,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:44:50,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573065420] [2024-06-28 03:44:50,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573065420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:44:50,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:44:50,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:44:50,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196112284] [2024-06-28 03:44:50,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:44:50,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:44:50,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:44:50,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:44:50,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:44:50,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:44:50,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 456 transitions, 8632 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:44:50,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:44:50,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:44:50,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:44:53,401 INFO L124 PetriNetUnfolderBase]: 6426/11055 cut-off events. [2024-06-28 03:44:53,401 INFO L125 PetriNetUnfolderBase]: For 421244/421373 co-relation queries the response was YES. [2024-06-28 03:44:53,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76730 conditions, 11055 events. 6426/11055 cut-off events. For 421244/421373 co-relation queries the response was YES. Maximal size of possible extension queue 817. Compared 86249 event pairs, 2690 based on Foata normal form. 93/11037 useless extension candidates. Maximal degree in co-relation 76621. Up to 8484 conditions per place. [2024-06-28 03:44:53,584 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 207 selfloop transitions, 238 changer transitions 0/487 dead transitions. [2024-06-28 03:44:53,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 487 transitions, 9890 flow [2024-06-28 03:44:53,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:44:53,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:44:53,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 03:44:53,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-28 03:44:53,586 INFO L175 Difference]: Start difference. First operand has 233 places, 456 transitions, 8632 flow. Second operand 8 states and 142 transitions. [2024-06-28 03:44:53,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 487 transitions, 9890 flow [2024-06-28 03:44:54,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 487 transitions, 9733 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-06-28 03:44:54,971 INFO L231 Difference]: Finished difference. Result has 239 places, 465 transitions, 9397 flow [2024-06-28 03:44:54,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8493, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9397, PETRI_PLACES=239, PETRI_TRANSITIONS=465} [2024-06-28 03:44:54,972 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-28 03:44:54,972 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 465 transitions, 9397 flow [2024-06-28 03:44:54,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:44:54,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:44:54,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:44:54,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 03:44:54,973 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:44:54,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:44:54,973 INFO L85 PathProgramCache]: Analyzing trace with hash 603476282, now seen corresponding path program 3 times [2024-06-28 03:44:54,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:44:54,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461064404] [2024-06-28 03:44:54,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:44:54,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:44:54,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:44:58,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:44:58,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:44:58,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461064404] [2024-06-28 03:44:58,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461064404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:44:58,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:44:58,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:44:58,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754585274] [2024-06-28 03:44:58,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:44:58,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:44:58,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:44:58,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:44:58,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:44:58,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:44:58,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 465 transitions, 9397 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:44:58,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:44:58,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:44:58,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:45:01,804 INFO L124 PetriNetUnfolderBase]: 6985/12026 cut-off events. [2024-06-28 03:45:01,804 INFO L125 PetriNetUnfolderBase]: For 481975/481979 co-relation queries the response was YES. [2024-06-28 03:45:01,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84079 conditions, 12026 events. 6985/12026 cut-off events. For 481975/481979 co-relation queries the response was YES. Maximal size of possible extension queue 861. Compared 94511 event pairs, 2306 based on Foata normal form. 25/12021 useless extension candidates. Maximal degree in co-relation 83967. Up to 9869 conditions per place. [2024-06-28 03:45:01,957 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 356 selfloop transitions, 176 changer transitions 0/537 dead transitions. [2024-06-28 03:45:01,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 537 transitions, 11150 flow [2024-06-28 03:45:01,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 03:45:01,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 03:45:01,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 216 transitions. [2024-06-28 03:45:01,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:45:01,958 INFO L175 Difference]: Start difference. First operand has 239 places, 465 transitions, 9397 flow. Second operand 12 states and 216 transitions. [2024-06-28 03:45:01,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 537 transitions, 11150 flow [2024-06-28 03:45:03,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 537 transitions, 11037 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-28 03:45:03,713 INFO L231 Difference]: Finished difference. Result has 249 places, 479 transitions, 10093 flow [2024-06-28 03:45:03,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9284, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10093, PETRI_PLACES=249, PETRI_TRANSITIONS=479} [2024-06-28 03:45:03,713 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 206 predicate places. [2024-06-28 03:45:03,713 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 479 transitions, 10093 flow [2024-06-28 03:45:03,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:03,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:45:03,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:45:03,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 03:45:03,714 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:45:03,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:45:03,714 INFO L85 PathProgramCache]: Analyzing trace with hash 331908506, now seen corresponding path program 4 times [2024-06-28 03:45:03,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:45:03,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985043795] [2024-06-28 03:45:03,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:45:03,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:45:03,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:45:06,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:45:06,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:45:06,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985043795] [2024-06-28 03:45:06,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985043795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:45:06,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:45:06,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:45:06,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217464540] [2024-06-28 03:45:06,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:45:06,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:45:06,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:45:06,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:45:06,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:45:06,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:45:06,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 479 transitions, 10093 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:06,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:45:06,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:45:06,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:45:10,337 INFO L124 PetriNetUnfolderBase]: 7344/12745 cut-off events. [2024-06-28 03:45:10,337 INFO L125 PetriNetUnfolderBase]: For 524964/524968 co-relation queries the response was YES. [2024-06-28 03:45:10,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89780 conditions, 12745 events. 7344/12745 cut-off events. For 524964/524968 co-relation queries the response was YES. Maximal size of possible extension queue 926. Compared 102147 event pairs, 2543 based on Foata normal form. 25/12754 useless extension candidates. Maximal degree in co-relation 89664. Up to 10459 conditions per place. [2024-06-28 03:45:10,503 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 366 selfloop transitions, 188 changer transitions 0/559 dead transitions. [2024-06-28 03:45:10,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 559 transitions, 11987 flow [2024-06-28 03:45:10,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 03:45:10,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 03:45:10,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 234 transitions. [2024-06-28 03:45:10,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:45:10,504 INFO L175 Difference]: Start difference. First operand has 249 places, 479 transitions, 10093 flow. Second operand 13 states and 234 transitions. [2024-06-28 03:45:10,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 559 transitions, 11987 flow [2024-06-28 03:45:12,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 559 transitions, 11529 flow, removed 55 selfloop flow, removed 8 redundant places. [2024-06-28 03:45:12,493 INFO L231 Difference]: Finished difference. Result has 256 places, 496 transitions, 10557 flow [2024-06-28 03:45:12,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9653, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10557, PETRI_PLACES=256, PETRI_TRANSITIONS=496} [2024-06-28 03:45:12,494 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-28 03:45:12,494 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 496 transitions, 10557 flow [2024-06-28 03:45:12,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:12,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:45:12,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:45:12,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 03:45:12,494 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:45:12,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:45:12,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1752691560, now seen corresponding path program 5 times [2024-06-28 03:45:12,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:45:12,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141623880] [2024-06-28 03:45:12,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:45:12,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:45:12,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:45:15,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:45:15,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:45:15,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141623880] [2024-06-28 03:45:15,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141623880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:45:15,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:45:15,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:45:15,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213512048] [2024-06-28 03:45:15,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:45:15,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:45:15,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:45:15,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:45:15,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:45:15,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:45:15,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 496 transitions, 10557 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:15,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:45:15,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:45:15,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:45:19,130 INFO L124 PetriNetUnfolderBase]: 7414/12883 cut-off events. [2024-06-28 03:45:19,131 INFO L125 PetriNetUnfolderBase]: For 505191/505195 co-relation queries the response was YES. [2024-06-28 03:45:19,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89320 conditions, 12883 events. 7414/12883 cut-off events. For 505191/505195 co-relation queries the response was YES. Maximal size of possible extension queue 937. Compared 103589 event pairs, 2534 based on Foata normal form. 25/12892 useless extension candidates. Maximal degree in co-relation 89201. Up to 10589 conditions per place. [2024-06-28 03:45:19,292 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 366 selfloop transitions, 200 changer transitions 0/571 dead transitions. [2024-06-28 03:45:19,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 571 transitions, 12270 flow [2024-06-28 03:45:19,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 03:45:19,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 03:45:19,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 232 transitions. [2024-06-28 03:45:19,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4249084249084249 [2024-06-28 03:45:19,293 INFO L175 Difference]: Start difference. First operand has 256 places, 496 transitions, 10557 flow. Second operand 13 states and 232 transitions. [2024-06-28 03:45:19,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 571 transitions, 12270 flow [2024-06-28 03:45:21,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 571 transitions, 11768 flow, removed 68 selfloop flow, removed 9 redundant places. [2024-06-28 03:45:21,587 INFO L231 Difference]: Finished difference. Result has 261 places, 506 transitions, 10756 flow [2024-06-28 03:45:21,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10067, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10756, PETRI_PLACES=261, PETRI_TRANSITIONS=506} [2024-06-28 03:45:21,588 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-28 03:45:21,588 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 506 transitions, 10756 flow [2024-06-28 03:45:21,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:21,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:45:21,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:45:21,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 03:45:21,588 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:45:21,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:45:21,590 INFO L85 PathProgramCache]: Analyzing trace with hash 229949754, now seen corresponding path program 6 times [2024-06-28 03:45:21,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:45:21,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256067201] [2024-06-28 03:45:21,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:45:21,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:45:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:45:24,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:45:24,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:45:24,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256067201] [2024-06-28 03:45:24,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256067201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:45:24,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:45:24,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:45:24,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782903158] [2024-06-28 03:45:24,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:45:24,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:45:24,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:45:24,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:45:24,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:45:24,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:45:24,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 506 transitions, 10756 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:24,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:45:24,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:45:24,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:45:28,603 INFO L124 PetriNetUnfolderBase]: 7394/12851 cut-off events. [2024-06-28 03:45:28,603 INFO L125 PetriNetUnfolderBase]: For 475112/475116 co-relation queries the response was YES. [2024-06-28 03:45:28,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88259 conditions, 12851 events. 7394/12851 cut-off events. For 475112/475116 co-relation queries the response was YES. Maximal size of possible extension queue 933. Compared 103060 event pairs, 2496 based on Foata normal form. 13/12848 useless extension candidates. Maximal degree in co-relation 88138. Up to 7767 conditions per place. [2024-06-28 03:45:28,779 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 320 selfloop transitions, 242 changer transitions 0/567 dead transitions. [2024-06-28 03:45:28,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 567 transitions, 12094 flow [2024-06-28 03:45:28,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 03:45:28,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 03:45:28,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 216 transitions. [2024-06-28 03:45:28,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:45:28,781 INFO L175 Difference]: Start difference. First operand has 261 places, 506 transitions, 10756 flow. Second operand 12 states and 216 transitions. [2024-06-28 03:45:28,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 567 transitions, 12094 flow [2024-06-28 03:45:31,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 567 transitions, 11506 flow, removed 46 selfloop flow, removed 9 redundant places. [2024-06-28 03:45:31,218 INFO L231 Difference]: Finished difference. Result has 263 places, 505 transitions, 10572 flow [2024-06-28 03:45:31,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10084, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10572, PETRI_PLACES=263, PETRI_TRANSITIONS=505} [2024-06-28 03:45:31,219 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-28 03:45:31,219 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 505 transitions, 10572 flow [2024-06-28 03:45:31,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:31,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:45:31,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:45:31,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 03:45:31,219 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:45:31,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:45:31,220 INFO L85 PathProgramCache]: Analyzing trace with hash 2063856512, now seen corresponding path program 6 times [2024-06-28 03:45:31,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:45:31,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5311493] [2024-06-28 03:45:31,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:45:31,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:45:31,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:45:33,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:45:33,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:45:33,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5311493] [2024-06-28 03:45:33,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5311493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:45:33,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:45:33,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:45:33,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687988469] [2024-06-28 03:45:33,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:45:33,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:45:33,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:45:33,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:45:33,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:45:33,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:45:33,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 505 transitions, 10572 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:33,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:45:33,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:45:33,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:45:36,747 INFO L124 PetriNetUnfolderBase]: 7398/12771 cut-off events. [2024-06-28 03:45:36,747 INFO L125 PetriNetUnfolderBase]: For 467440/467443 co-relation queries the response was YES. [2024-06-28 03:45:36,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87237 conditions, 12771 events. 7398/12771 cut-off events. For 467440/467443 co-relation queries the response was YES. Maximal size of possible extension queue 923. Compared 101360 event pairs, 3750 based on Foata normal form. 4/12773 useless extension candidates. Maximal degree in co-relation 87116. Up to 11873 conditions per place. [2024-06-28 03:45:36,914 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 494 selfloop transitions, 26 changer transitions 0/525 dead transitions. [2024-06-28 03:45:36,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 525 transitions, 11930 flow [2024-06-28 03:45:36,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:45:36,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:45:36,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-28 03:45:36,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-28 03:45:36,915 INFO L175 Difference]: Start difference. First operand has 263 places, 505 transitions, 10572 flow. Second operand 7 states and 113 transitions. [2024-06-28 03:45:36,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 525 transitions, 11930 flow [2024-06-28 03:45:39,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 525 transitions, 11428 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-28 03:45:39,391 INFO L231 Difference]: Finished difference. Result has 261 places, 513 transitions, 10322 flow [2024-06-28 03:45:39,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10070, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10322, PETRI_PLACES=261, PETRI_TRANSITIONS=513} [2024-06-28 03:45:39,392 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-28 03:45:39,392 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 513 transitions, 10322 flow [2024-06-28 03:45:39,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:39,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:45:39,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:45:39,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 03:45:39,393 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:45:39,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:45:39,393 INFO L85 PathProgramCache]: Analyzing trace with hash 2063856915, now seen corresponding path program 3 times [2024-06-28 03:45:39,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:45:39,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315578840] [2024-06-28 03:45:39,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:45:39,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:45:39,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:45:42,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:45:42,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:45:42,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315578840] [2024-06-28 03:45:42,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315578840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:45:42,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:45:42,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:45:42,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574629804] [2024-06-28 03:45:42,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:45:42,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:45:42,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:45:42,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:45:42,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:45:42,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:45:42,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 513 transitions, 10322 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:42,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:45:42,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:45:42,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:45:45,594 INFO L124 PetriNetUnfolderBase]: 7072/12275 cut-off events. [2024-06-28 03:45:45,594 INFO L125 PetriNetUnfolderBase]: For 486306/486429 co-relation queries the response was YES. [2024-06-28 03:45:45,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84460 conditions, 12275 events. 7072/12275 cut-off events. For 486306/486429 co-relation queries the response was YES. Maximal size of possible extension queue 927. Compared 98389 event pairs, 3045 based on Foata normal form. 86/12249 useless extension candidates. Maximal degree in co-relation 84337. Up to 11172 conditions per place. [2024-06-28 03:45:45,727 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 457 selfloop transitions, 26 changer transitions 0/527 dead transitions. [2024-06-28 03:45:45,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 527 transitions, 11398 flow [2024-06-28 03:45:45,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:45:45,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:45:45,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-28 03:45:45,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-28 03:45:45,729 INFO L175 Difference]: Start difference. First operand has 261 places, 513 transitions, 10322 flow. Second operand 7 states and 115 transitions. [2024-06-28 03:45:45,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 527 transitions, 11398 flow [2024-06-28 03:45:47,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 527 transitions, 11271 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-28 03:45:47,373 INFO L231 Difference]: Finished difference. Result has 265 places, 516 transitions, 10337 flow [2024-06-28 03:45:47,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10195, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10337, PETRI_PLACES=265, PETRI_TRANSITIONS=516} [2024-06-28 03:45:47,374 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-28 03:45:47,374 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 516 transitions, 10337 flow [2024-06-28 03:45:47,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:47,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:45:47,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:45:47,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 03:45:47,375 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:45:47,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:45:47,375 INFO L85 PathProgramCache]: Analyzing trace with hash 2064302385, now seen corresponding path program 4 times [2024-06-28 03:45:47,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:45:47,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307792000] [2024-06-28 03:45:47,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:45:47,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:45:47,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:45:50,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:45:50,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:45:50,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307792000] [2024-06-28 03:45:50,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307792000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:45:50,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:45:50,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:45:50,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10939117] [2024-06-28 03:45:50,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:45:50,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:45:50,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:45:50,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:45:50,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:45:50,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:45:50,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 516 transitions, 10337 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:50,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:45:50,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:45:50,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:45:53,364 INFO L124 PetriNetUnfolderBase]: 7071/12237 cut-off events. [2024-06-28 03:45:53,364 INFO L125 PetriNetUnfolderBase]: For 501183/501331 co-relation queries the response was YES. [2024-06-28 03:45:53,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84541 conditions, 12237 events. 7071/12237 cut-off events. For 501183/501331 co-relation queries the response was YES. Maximal size of possible extension queue 928. Compared 98123 event pairs, 3496 based on Foata normal form. 118/12240 useless extension candidates. Maximal degree in co-relation 84416. Up to 11203 conditions per place. [2024-06-28 03:45:53,513 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 465 selfloop transitions, 21 changer transitions 0/530 dead transitions. [2024-06-28 03:45:53,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 530 transitions, 11425 flow [2024-06-28 03:45:53,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:45:53,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:45:53,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-28 03:45:53,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-28 03:45:53,515 INFO L175 Difference]: Start difference. First operand has 265 places, 516 transitions, 10337 flow. Second operand 7 states and 115 transitions. [2024-06-28 03:45:53,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 530 transitions, 11425 flow [2024-06-28 03:45:55,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 530 transitions, 11305 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-28 03:45:55,294 INFO L231 Difference]: Finished difference. Result has 267 places, 519 transitions, 10359 flow [2024-06-28 03:45:55,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10217, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10359, PETRI_PLACES=267, PETRI_TRANSITIONS=519} [2024-06-28 03:45:55,294 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-28 03:45:55,295 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 519 transitions, 10359 flow [2024-06-28 03:45:55,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:55,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:45:55,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:45:55,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 03:45:55,295 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:45:55,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:45:55,296 INFO L85 PathProgramCache]: Analyzing trace with hash 987424618, now seen corresponding path program 1 times [2024-06-28 03:45:55,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:45:55,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986619667] [2024-06-28 03:45:55,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:45:55,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:45:55,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:45:56,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:45:56,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:45:56,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986619667] [2024-06-28 03:45:56,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986619667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:45:56,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:45:56,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:45:56,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366984872] [2024-06-28 03:45:56,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:45:56,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:45:56,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:45:56,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:45:56,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:45:56,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:45:56,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 519 transitions, 10359 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:45:56,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:45:56,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:45:56,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:46:00,368 INFO L124 PetriNetUnfolderBase]: 7402/12788 cut-off events. [2024-06-28 03:46:00,369 INFO L125 PetriNetUnfolderBase]: For 481522/481522 co-relation queries the response was YES. [2024-06-28 03:46:00,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86971 conditions, 12788 events. 7402/12788 cut-off events. For 481522/481522 co-relation queries the response was YES. Maximal size of possible extension queue 923. Compared 101560 event pairs, 3751 based on Foata normal form. 2/12789 useless extension candidates. Maximal degree in co-relation 86845. Up to 11893 conditions per place. [2024-06-28 03:46:00,501 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 522 selfloop transitions, 17 changer transitions 0/544 dead transitions. [2024-06-28 03:46:00,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 544 transitions, 11628 flow [2024-06-28 03:46:00,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:46:00,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:46:00,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-28 03:46:00,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-28 03:46:00,503 INFO L175 Difference]: Start difference. First operand has 267 places, 519 transitions, 10359 flow. Second operand 7 states and 116 transitions. [2024-06-28 03:46:00,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 544 transitions, 11628 flow [2024-06-28 03:46:02,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 544 transitions, 11522 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-28 03:46:02,288 INFO L231 Difference]: Finished difference. Result has 269 places, 524 transitions, 10415 flow [2024-06-28 03:46:02,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10253, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10415, PETRI_PLACES=269, PETRI_TRANSITIONS=524} [2024-06-28 03:46:02,289 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 226 predicate places. [2024-06-28 03:46:02,289 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 524 transitions, 10415 flow [2024-06-28 03:46:02,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:02,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:46:02,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:46:02,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 03:46:02,290 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:46:02,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:46:02,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1857387987, now seen corresponding path program 1 times [2024-06-28 03:46:02,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:46:02,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786446795] [2024-06-28 03:46:02,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:46:02,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:46:02,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:46:03,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:46:03,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:46:03,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786446795] [2024-06-28 03:46:03,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786446795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:46:03,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:46:03,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:46:03,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306542183] [2024-06-28 03:46:03,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:46:03,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:46:03,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:46:03,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:46:03,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:46:03,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:46:03,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 524 transitions, 10415 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:03,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:46:03,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:46:03,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:46:07,093 INFO L124 PetriNetUnfolderBase]: 7407/12791 cut-off events. [2024-06-28 03:46:07,094 INFO L125 PetriNetUnfolderBase]: For 491903/491903 co-relation queries the response was YES. [2024-06-28 03:46:07,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88043 conditions, 12791 events. 7407/12791 cut-off events. For 491903/491903 co-relation queries the response was YES. Maximal size of possible extension queue 923. Compared 101476 event pairs, 3750 based on Foata normal form. 1/12791 useless extension candidates. Maximal degree in co-relation 87916. Up to 11911 conditions per place. [2024-06-28 03:46:07,292 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 522 selfloop transitions, 15 changer transitions 0/542 dead transitions. [2024-06-28 03:46:07,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 542 transitions, 11595 flow [2024-06-28 03:46:07,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:46:07,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:46:07,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-28 03:46:07,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-28 03:46:07,293 INFO L175 Difference]: Start difference. First operand has 269 places, 524 transitions, 10415 flow. Second operand 7 states and 111 transitions. [2024-06-28 03:46:07,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 542 transitions, 11595 flow [2024-06-28 03:46:09,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 542 transitions, 11497 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-28 03:46:09,662 INFO L231 Difference]: Finished difference. Result has 271 places, 527 transitions, 10417 flow [2024-06-28 03:46:09,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10317, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10417, PETRI_PLACES=271, PETRI_TRANSITIONS=527} [2024-06-28 03:46:09,663 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-28 03:46:09,663 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 527 transitions, 10417 flow [2024-06-28 03:46:09,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:09,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:46:09,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:46:09,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 03:46:09,664 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:46:09,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:46:09,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1857387770, now seen corresponding path program 2 times [2024-06-28 03:46:09,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:46:09,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563245228] [2024-06-28 03:46:09,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:46:09,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:46:09,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:46:11,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:46:11,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:46:11,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563245228] [2024-06-28 03:46:11,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563245228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:46:11,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:46:11,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:46:11,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750856288] [2024-06-28 03:46:11,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:46:11,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:46:11,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:46:11,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:46:11,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:46:11,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:46:11,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 527 transitions, 10417 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:11,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:46:11,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:46:11,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:46:14,518 INFO L124 PetriNetUnfolderBase]: 7409/12800 cut-off events. [2024-06-28 03:46:14,519 INFO L125 PetriNetUnfolderBase]: For 501910/501910 co-relation queries the response was YES. [2024-06-28 03:46:14,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88302 conditions, 12800 events. 7409/12800 cut-off events. For 501910/501910 co-relation queries the response was YES. Maximal size of possible extension queue 923. Compared 101629 event pairs, 3750 based on Foata normal form. 2/12801 useless extension candidates. Maximal degree in co-relation 88174. Up to 11894 conditions per place. [2024-06-28 03:46:14,690 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 519 selfloop transitions, 24 changer transitions 0/548 dead transitions. [2024-06-28 03:46:14,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 548 transitions, 11672 flow [2024-06-28 03:46:14,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:46:14,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:46:14,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-28 03:46:14,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-28 03:46:14,691 INFO L175 Difference]: Start difference. First operand has 271 places, 527 transitions, 10417 flow. Second operand 7 states and 115 transitions. [2024-06-28 03:46:14,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 548 transitions, 11672 flow [2024-06-28 03:46:16,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 548 transitions, 11594 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-28 03:46:16,906 INFO L231 Difference]: Finished difference. Result has 273 places, 531 transitions, 10491 flow [2024-06-28 03:46:16,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10339, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10491, PETRI_PLACES=273, PETRI_TRANSITIONS=531} [2024-06-28 03:46:16,906 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-28 03:46:16,907 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 531 transitions, 10491 flow [2024-06-28 03:46:16,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:16,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:46:16,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:46:16,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 03:46:16,907 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:46:16,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:46:16,907 INFO L85 PathProgramCache]: Analyzing trace with hash 2064308337, now seen corresponding path program 2 times [2024-06-28 03:46:16,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:46:16,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575396684] [2024-06-28 03:46:16,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:46:16,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:46:16,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:46:19,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:46:19,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:46:19,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575396684] [2024-06-28 03:46:19,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575396684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:46:19,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:46:19,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:46:19,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540424771] [2024-06-28 03:46:19,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:46:19,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:46:19,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:46:19,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:46:19,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:46:19,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:46:19,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 531 transitions, 10491 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:19,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:46:19,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:46:19,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:46:22,285 INFO L124 PetriNetUnfolderBase]: 7406/12793 cut-off events. [2024-06-28 03:46:22,285 INFO L125 PetriNetUnfolderBase]: For 512991/512994 co-relation queries the response was YES. [2024-06-28 03:46:22,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89174 conditions, 12793 events. 7406/12793 cut-off events. For 512991/512994 co-relation queries the response was YES. Maximal size of possible extension queue 923. Compared 101588 event pairs, 3755 based on Foata normal form. 3/12794 useless extension candidates. Maximal degree in co-relation 89045. Up to 11896 conditions per place. [2024-06-28 03:46:22,485 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 515 selfloop transitions, 26 changer transitions 0/546 dead transitions. [2024-06-28 03:46:22,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 546 transitions, 11673 flow [2024-06-28 03:46:22,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:46:22,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:46:22,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-28 03:46:22,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3630952380952381 [2024-06-28 03:46:22,487 INFO L175 Difference]: Start difference. First operand has 273 places, 531 transitions, 10491 flow. Second operand 8 states and 122 transitions. [2024-06-28 03:46:22,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 546 transitions, 11673 flow [2024-06-28 03:46:25,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 546 transitions, 11551 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-28 03:46:25,021 INFO L231 Difference]: Finished difference. Result has 276 places, 534 transitions, 10500 flow [2024-06-28 03:46:25,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10369, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10500, PETRI_PLACES=276, PETRI_TRANSITIONS=534} [2024-06-28 03:46:25,021 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-28 03:46:25,021 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 534 transitions, 10500 flow [2024-06-28 03:46:25,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:25,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:46:25,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:46:25,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 03:46:25,022 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:46:25,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:46:25,023 INFO L85 PathProgramCache]: Analyzing trace with hash 2064041210, now seen corresponding path program 3 times [2024-06-28 03:46:25,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:46:25,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339811096] [2024-06-28 03:46:25,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:46:25,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:46:25,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:46:26,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:46:26,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:46:26,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339811096] [2024-06-28 03:46:26,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339811096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:46:26,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:46:26,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:46:26,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979172865] [2024-06-28 03:46:26,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:46:26,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:46:26,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:46:26,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:46:26,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:46:26,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:46:26,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 534 transitions, 10500 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:26,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:46:26,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:46:26,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:46:29,800 INFO L124 PetriNetUnfolderBase]: 7400/12790 cut-off events. [2024-06-28 03:46:29,800 INFO L125 PetriNetUnfolderBase]: For 520005/520008 co-relation queries the response was YES. [2024-06-28 03:46:29,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89235 conditions, 12790 events. 7400/12790 cut-off events. For 520005/520008 co-relation queries the response was YES. Maximal size of possible extension queue 923. Compared 101629 event pairs, 3759 based on Foata normal form. 4/12791 useless extension candidates. Maximal degree in co-relation 89105. Up to 11870 conditions per place. [2024-06-28 03:46:29,960 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 515 selfloop transitions, 31 changer transitions 0/551 dead transitions. [2024-06-28 03:46:29,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 551 transitions, 11755 flow [2024-06-28 03:46:29,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:46:29,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:46:29,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-28 03:46:29,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-28 03:46:29,961 INFO L175 Difference]: Start difference. First operand has 276 places, 534 transitions, 10500 flow. Second operand 7 states and 113 transitions. [2024-06-28 03:46:29,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 551 transitions, 11755 flow [2024-06-28 03:46:32,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 551 transitions, 11648 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-28 03:46:32,226 INFO L231 Difference]: Finished difference. Result has 277 places, 537 transitions, 10539 flow [2024-06-28 03:46:32,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10393, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10539, PETRI_PLACES=277, PETRI_TRANSITIONS=537} [2024-06-28 03:46:32,227 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-28 03:46:32,227 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 537 transitions, 10539 flow [2024-06-28 03:46:32,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:32,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:46:32,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:46:32,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 03:46:32,228 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:46:32,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:46:32,228 INFO L85 PathProgramCache]: Analyzing trace with hash -138104366, now seen corresponding path program 1 times [2024-06-28 03:46:32,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:46:32,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94782114] [2024-06-28 03:46:32,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:46:32,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:46:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:46:34,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:46:34,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:46:34,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94782114] [2024-06-28 03:46:34,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94782114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:46:34,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:46:34,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:46:34,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094536786] [2024-06-28 03:46:34,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:46:34,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:46:34,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:46:34,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:46:34,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:46:34,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:46:34,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 537 transitions, 10539 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:34,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:46:34,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:46:34,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:46:37,468 INFO L124 PetriNetUnfolderBase]: 7410/12806 cut-off events. [2024-06-28 03:46:37,469 INFO L125 PetriNetUnfolderBase]: For 530380/530403 co-relation queries the response was YES. [2024-06-28 03:46:37,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90289 conditions, 12806 events. 7410/12806 cut-off events. For 530380/530403 co-relation queries the response was YES. Maximal size of possible extension queue 920. Compared 101838 event pairs, 2757 based on Foata normal form. 24/12828 useless extension candidates. Maximal degree in co-relation 90158. Up to 11674 conditions per place. [2024-06-28 03:46:37,656 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 499 selfloop transitions, 69 changer transitions 0/573 dead transitions. [2024-06-28 03:46:37,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 573 transitions, 11850 flow [2024-06-28 03:46:37,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:46:37,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:46:37,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-28 03:46:37,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-28 03:46:37,657 INFO L175 Difference]: Start difference. First operand has 277 places, 537 transitions, 10539 flow. Second operand 9 states and 160 transitions. [2024-06-28 03:46:37,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 573 transitions, 11850 flow [2024-06-28 03:46:40,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 573 transitions, 11736 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-28 03:46:40,521 INFO L231 Difference]: Finished difference. Result has 281 places, 541 transitions, 10656 flow [2024-06-28 03:46:40,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10425, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10656, PETRI_PLACES=281, PETRI_TRANSITIONS=541} [2024-06-28 03:46:40,522 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-28 03:46:40,522 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 541 transitions, 10656 flow [2024-06-28 03:46:40,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:40,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:46:40,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:46:40,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 03:46:40,522 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:46:40,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:46:40,523 INFO L85 PathProgramCache]: Analyzing trace with hash -913318924, now seen corresponding path program 2 times [2024-06-28 03:46:40,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:46:40,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508802520] [2024-06-28 03:46:40,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:46:40,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:46:40,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:46:43,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:46:43,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:46:43,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508802520] [2024-06-28 03:46:43,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508802520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:46:43,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:46:43,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:46:43,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219587972] [2024-06-28 03:46:43,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:46:43,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:46:43,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:46:43,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:46:43,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:46:43,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:46:43,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 541 transitions, 10656 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:43,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:46:43,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:46:43,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:46:46,370 INFO L124 PetriNetUnfolderBase]: 7422/12814 cut-off events. [2024-06-28 03:46:46,371 INFO L125 PetriNetUnfolderBase]: For 539230/539253 co-relation queries the response was YES. [2024-06-28 03:46:46,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90783 conditions, 12814 events. 7422/12814 cut-off events. For 539230/539253 co-relation queries the response was YES. Maximal size of possible extension queue 921. Compared 101877 event pairs, 2675 based on Foata normal form. 24/12836 useless extension candidates. Maximal degree in co-relation 90651. Up to 11687 conditions per place. [2024-06-28 03:46:46,544 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 504 selfloop transitions, 70 changer transitions 0/579 dead transitions. [2024-06-28 03:46:46,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 579 transitions, 12066 flow [2024-06-28 03:46:46,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:46:46,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:46:46,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-28 03:46:46,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-28 03:46:46,546 INFO L175 Difference]: Start difference. First operand has 281 places, 541 transitions, 10656 flow. Second operand 9 states and 159 transitions. [2024-06-28 03:46:46,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 579 transitions, 12066 flow [2024-06-28 03:46:49,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 579 transitions, 11810 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-28 03:46:49,392 INFO L231 Difference]: Finished difference. Result has 283 places, 549 transitions, 10742 flow [2024-06-28 03:46:49,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10464, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10742, PETRI_PLACES=283, PETRI_TRANSITIONS=549} [2024-06-28 03:46:49,392 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-28 03:46:49,392 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 549 transitions, 10742 flow [2024-06-28 03:46:49,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:49,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:46:49,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:46:49,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 03:46:49,393 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:46:49,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:46:49,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1886506294, now seen corresponding path program 1 times [2024-06-28 03:46:49,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:46:49,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129715628] [2024-06-28 03:46:49,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:46:49,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:46:49,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:46:51,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:46:51,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:46:51,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129715628] [2024-06-28 03:46:51,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129715628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:46:51,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:46:51,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:46:51,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545464595] [2024-06-28 03:46:51,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:46:51,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:46:51,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:46:51,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:46:51,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:46:51,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:46:51,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 549 transitions, 10742 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:51,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:46:51,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:46:51,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:46:54,559 INFO L124 PetriNetUnfolderBase]: 7432/12816 cut-off events. [2024-06-28 03:46:54,559 INFO L125 PetriNetUnfolderBase]: For 548659/548662 co-relation queries the response was YES. [2024-06-28 03:46:54,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91044 conditions, 12816 events. 7432/12816 cut-off events. For 548659/548662 co-relation queries the response was YES. Maximal size of possible extension queue 922. Compared 101621 event pairs, 2670 based on Foata normal form. 4/12818 useless extension candidates. Maximal degree in co-relation 90911. Up to 11719 conditions per place. [2024-06-28 03:46:54,716 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 519 selfloop transitions, 57 changer transitions 0/581 dead transitions. [2024-06-28 03:46:54,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 581 transitions, 12090 flow [2024-06-28 03:46:54,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:46:54,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:46:54,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-28 03:46:54,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:46:54,717 INFO L175 Difference]: Start difference. First operand has 283 places, 549 transitions, 10742 flow. Second operand 8 states and 144 transitions. [2024-06-28 03:46:54,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 581 transitions, 12090 flow [2024-06-28 03:46:57,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 581 transitions, 11918 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-28 03:46:57,266 INFO L231 Difference]: Finished difference. Result has 285 places, 553 transitions, 10808 flow [2024-06-28 03:46:57,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10570, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10808, PETRI_PLACES=285, PETRI_TRANSITIONS=553} [2024-06-28 03:46:57,266 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-28 03:46:57,266 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 553 transitions, 10808 flow [2024-06-28 03:46:57,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:57,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:46:57,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:46:57,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 03:46:57,267 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:46:57,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:46:57,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1550198858, now seen corresponding path program 2 times [2024-06-28 03:46:57,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:46:57,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187180049] [2024-06-28 03:46:57,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:46:57,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:46:57,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:46:59,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:46:59,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:46:59,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187180049] [2024-06-28 03:46:59,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187180049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:46:59,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:46:59,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:46:59,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241135560] [2024-06-28 03:46:59,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:46:59,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:46:59,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:46:59,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:46:59,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:46:59,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:46:59,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 553 transitions, 10808 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:46:59,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:46:59,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:46:59,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:47:02,524 INFO L124 PetriNetUnfolderBase]: 7423/12810 cut-off events. [2024-06-28 03:47:02,524 INFO L125 PetriNetUnfolderBase]: For 555297/555308 co-relation queries the response was YES. [2024-06-28 03:47:02,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90828 conditions, 12810 events. 7423/12810 cut-off events. For 555297/555308 co-relation queries the response was YES. Maximal size of possible extension queue 920. Compared 101637 event pairs, 2685 based on Foata normal form. 13/12821 useless extension candidates. Maximal degree in co-relation 90694. Up to 11644 conditions per place. [2024-06-28 03:47:02,711 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 496 selfloop transitions, 82 changer transitions 0/583 dead transitions. [2024-06-28 03:47:02,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 583 transitions, 12287 flow [2024-06-28 03:47:02,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:47:02,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:47:02,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 03:47:02,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-28 03:47:02,713 INFO L175 Difference]: Start difference. First operand has 285 places, 553 transitions, 10808 flow. Second operand 8 states and 142 transitions. [2024-06-28 03:47:02,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 583 transitions, 12287 flow [2024-06-28 03:47:05,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 583 transitions, 12159 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-28 03:47:05,610 INFO L231 Difference]: Finished difference. Result has 289 places, 558 transitions, 11020 flow [2024-06-28 03:47:05,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10680, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11020, PETRI_PLACES=289, PETRI_TRANSITIONS=558} [2024-06-28 03:47:05,612 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-28 03:47:05,612 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 558 transitions, 11020 flow [2024-06-28 03:47:05,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:05,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:47:05,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:47:05,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 03:47:05,613 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:47:05,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:47:05,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1550189930, now seen corresponding path program 1 times [2024-06-28 03:47:05,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:47:05,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307872042] [2024-06-28 03:47:05,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:47:05,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:47:05,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:47:08,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:47:08,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:47:08,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307872042] [2024-06-28 03:47:08,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307872042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:47:08,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:47:08,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:47:08,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375513946] [2024-06-28 03:47:08,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:47:08,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:47:08,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:47:08,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:47:08,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:47:08,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:47:08,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 558 transitions, 11020 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:08,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:47:08,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:47:08,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:47:11,570 INFO L124 PetriNetUnfolderBase]: 7099/12303 cut-off events. [2024-06-28 03:47:11,570 INFO L125 PetriNetUnfolderBase]: For 601412/601531 co-relation queries the response was YES. [2024-06-28 03:47:11,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89046 conditions, 12303 events. 7099/12303 cut-off events. For 601412/601531 co-relation queries the response was YES. Maximal size of possible extension queue 924. Compared 98561 event pairs, 3132 based on Foata normal form. 86/12282 useless extension candidates. Maximal degree in co-relation 88910. Up to 11209 conditions per place. [2024-06-28 03:47:11,743 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 512 selfloop transitions, 22 changer transitions 0/585 dead transitions. [2024-06-28 03:47:11,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 585 transitions, 12242 flow [2024-06-28 03:47:11,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:47:11,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:47:11,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-28 03:47:11,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-28 03:47:11,745 INFO L175 Difference]: Start difference. First operand has 289 places, 558 transitions, 11020 flow. Second operand 8 states and 141 transitions. [2024-06-28 03:47:11,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 585 transitions, 12242 flow [2024-06-28 03:47:14,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 585 transitions, 12037 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-28 03:47:14,088 INFO L231 Difference]: Finished difference. Result has 292 places, 560 transitions, 10948 flow [2024-06-28 03:47:14,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10815, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10948, PETRI_PLACES=292, PETRI_TRANSITIONS=560} [2024-06-28 03:47:14,089 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-28 03:47:14,089 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 560 transitions, 10948 flow [2024-06-28 03:47:14,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:14,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:47:14,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:47:14,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 03:47:14,089 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:47:14,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:47:14,090 INFO L85 PathProgramCache]: Analyzing trace with hash 532435348, now seen corresponding path program 3 times [2024-06-28 03:47:14,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:47:14,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359342520] [2024-06-28 03:47:14,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:47:14,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:47:14,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:47:16,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:47:16,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:47:16,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359342520] [2024-06-28 03:47:16,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359342520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:47:16,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:47:16,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:47:16,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951749165] [2024-06-28 03:47:16,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:47:16,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:47:16,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:47:16,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:47:16,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:47:16,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:47:16,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 560 transitions, 10948 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:16,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:47:16,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:47:16,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:47:19,954 INFO L124 PetriNetUnfolderBase]: 7441/12844 cut-off events. [2024-06-28 03:47:19,955 INFO L125 PetriNetUnfolderBase]: For 588242/588265 co-relation queries the response was YES. [2024-06-28 03:47:20,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91388 conditions, 12844 events. 7441/12844 cut-off events. For 588242/588265 co-relation queries the response was YES. Maximal size of possible extension queue 922. Compared 102209 event pairs, 2528 based on Foata normal form. 24/12866 useless extension candidates. Maximal degree in co-relation 91251. Up to 9822 conditions per place. [2024-06-28 03:47:20,103 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 261 selfloop transitions, 332 changer transitions 0/598 dead transitions. [2024-06-28 03:47:20,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 598 transitions, 12640 flow [2024-06-28 03:47:20,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:47:20,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:47:20,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-28 03:47:20,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-28 03:47:20,105 INFO L175 Difference]: Start difference. First operand has 292 places, 560 transitions, 10948 flow. Second operand 10 states and 177 transitions. [2024-06-28 03:47:20,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 598 transitions, 12640 flow [2024-06-28 03:47:22,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 598 transitions, 12523 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-28 03:47:22,663 INFO L231 Difference]: Finished difference. Result has 296 places, 564 transitions, 11627 flow [2024-06-28 03:47:22,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10831, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=328, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11627, PETRI_PLACES=296, PETRI_TRANSITIONS=564} [2024-06-28 03:47:22,664 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-28 03:47:22,664 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 564 transitions, 11627 flow [2024-06-28 03:47:22,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:22,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:47:22,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:47:22,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 03:47:22,664 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:47:22,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:47:22,665 INFO L85 PathProgramCache]: Analyzing trace with hash -634773104, now seen corresponding path program 3 times [2024-06-28 03:47:22,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:47:22,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555920442] [2024-06-28 03:47:22,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:47:22,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:47:22,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:47:24,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:47:24,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:47:24,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555920442] [2024-06-28 03:47:24,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555920442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:47:24,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:47:24,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:47:24,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898320161] [2024-06-28 03:47:24,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:47:24,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:47:24,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:47:24,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:47:24,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:47:25,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:47:25,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 564 transitions, 11627 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:25,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:47:25,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:47:25,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:47:28,348 INFO L124 PetriNetUnfolderBase]: 7505/12920 cut-off events. [2024-06-28 03:47:28,348 INFO L125 PetriNetUnfolderBase]: For 637857/637860 co-relation queries the response was YES. [2024-06-28 03:47:28,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95726 conditions, 12920 events. 7505/12920 cut-off events. For 637857/637860 co-relation queries the response was YES. Maximal size of possible extension queue 932. Compared 102561 event pairs, 2698 based on Foata normal form. 6/12924 useless extension candidates. Maximal degree in co-relation 95588. Up to 9941 conditions per place. [2024-06-28 03:47:28,540 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 285 selfloop transitions, 331 changer transitions 0/621 dead transitions. [2024-06-28 03:47:28,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 621 transitions, 13892 flow [2024-06-28 03:47:28,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:47:28,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:47:28,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-28 03:47:28,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-28 03:47:28,542 INFO L175 Difference]: Start difference. First operand has 296 places, 564 transitions, 11627 flow. Second operand 9 states and 161 transitions. [2024-06-28 03:47:28,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 621 transitions, 13892 flow [2024-06-28 03:47:31,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 621 transitions, 13130 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-28 03:47:31,196 INFO L231 Difference]: Finished difference. Result has 299 places, 591 transitions, 12521 flow [2024-06-28 03:47:31,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10899, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12521, PETRI_PLACES=299, PETRI_TRANSITIONS=591} [2024-06-28 03:47:31,197 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-28 03:47:31,197 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 591 transitions, 12521 flow [2024-06-28 03:47:31,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:31,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:47:31,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:47:31,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 03:47:31,198 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:47:31,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:47:31,198 INFO L85 PathProgramCache]: Analyzing trace with hash 542615934, now seen corresponding path program 4 times [2024-06-28 03:47:31,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:47:31,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417749864] [2024-06-28 03:47:31,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:47:31,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:47:31,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:47:33,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:47:33,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:47:33,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417749864] [2024-06-28 03:47:33,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417749864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:47:33,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:47:33,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:47:33,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213525407] [2024-06-28 03:47:33,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:47:33,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:47:33,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:47:33,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:47:33,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:47:33,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:47:33,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 591 transitions, 12521 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:33,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:47:33,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:47:33,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:47:36,502 INFO L124 PetriNetUnfolderBase]: 7496/12921 cut-off events. [2024-06-28 03:47:36,502 INFO L125 PetriNetUnfolderBase]: For 661344/661355 co-relation queries the response was YES. [2024-06-28 03:47:36,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96843 conditions, 12921 events. 7496/12921 cut-off events. For 661344/661355 co-relation queries the response was YES. Maximal size of possible extension queue 930. Compared 102515 event pairs, 2689 based on Foata normal form. 13/12932 useless extension candidates. Maximal degree in co-relation 96702. Up to 11706 conditions per place. [2024-06-28 03:47:36,686 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 496 selfloop transitions, 110 changer transitions 0/611 dead transitions. [2024-06-28 03:47:36,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 611 transitions, 13956 flow [2024-06-28 03:47:36,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:47:36,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:47:36,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-28 03:47:36,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-28 03:47:36,688 INFO L175 Difference]: Start difference. First operand has 299 places, 591 transitions, 12521 flow. Second operand 7 states and 122 transitions. [2024-06-28 03:47:36,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 611 transitions, 13956 flow [2024-06-28 03:47:40,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 611 transitions, 13773 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-28 03:47:40,388 INFO L231 Difference]: Finished difference. Result has 302 places, 592 transitions, 12607 flow [2024-06-28 03:47:40,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12338, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12607, PETRI_PLACES=302, PETRI_TRANSITIONS=592} [2024-06-28 03:47:40,389 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-28 03:47:40,389 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 592 transitions, 12607 flow [2024-06-28 03:47:40,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:40,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:47:40,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:47:40,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 03:47:40,389 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:47:40,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:47:40,390 INFO L85 PathProgramCache]: Analyzing trace with hash 542612338, now seen corresponding path program 4 times [2024-06-28 03:47:40,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:47:40,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673916231] [2024-06-28 03:47:40,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:47:40,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:47:40,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:47:43,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:47:43,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:47:43,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673916231] [2024-06-28 03:47:43,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673916231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:47:43,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:47:43,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:47:43,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790884625] [2024-06-28 03:47:43,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:47:43,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:47:43,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:47:43,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:47:43,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:47:43,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:47:43,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 592 transitions, 12607 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:43,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:47:43,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:47:43,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:47:46,649 INFO L124 PetriNetUnfolderBase]: 7520/12959 cut-off events. [2024-06-28 03:47:46,650 INFO L125 PetriNetUnfolderBase]: For 670914/670925 co-relation queries the response was YES. [2024-06-28 03:47:46,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97474 conditions, 12959 events. 7520/12959 cut-off events. For 670914/670925 co-relation queries the response was YES. Maximal size of possible extension queue 932. Compared 102835 event pairs, 2689 based on Foata normal form. 12/12969 useless extension candidates. Maximal degree in co-relation 97331. Up to 11722 conditions per place. [2024-06-28 03:47:46,832 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 496 selfloop transitions, 119 changer transitions 0/620 dead transitions. [2024-06-28 03:47:46,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 620 transitions, 14184 flow [2024-06-28 03:47:46,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:47:46,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:47:46,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 03:47:46,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-28 03:47:46,834 INFO L175 Difference]: Start difference. First operand has 302 places, 592 transitions, 12607 flow. Second operand 8 states and 135 transitions. [2024-06-28 03:47:46,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 620 transitions, 14184 flow [2024-06-28 03:47:50,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 620 transitions, 13962 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-28 03:47:50,692 INFO L231 Difference]: Finished difference. Result has 306 places, 600 transitions, 12800 flow [2024-06-28 03:47:50,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12387, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12800, PETRI_PLACES=306, PETRI_TRANSITIONS=600} [2024-06-28 03:47:50,693 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-28 03:47:50,693 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 600 transitions, 12800 flow [2024-06-28 03:47:50,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:50,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:47:50,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:47:50,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 03:47:50,693 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:47:50,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:47:50,694 INFO L85 PathProgramCache]: Analyzing trace with hash 542624428, now seen corresponding path program 5 times [2024-06-28 03:47:50,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:47:50,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129162622] [2024-06-28 03:47:50,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:47:50,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:47:50,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:47:53,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:47:53,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:47:53,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129162622] [2024-06-28 03:47:53,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129162622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:47:53,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:47:53,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:47:53,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799256611] [2024-06-28 03:47:53,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:47:53,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:47:53,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:47:53,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:47:53,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:47:53,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:47:53,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 600 transitions, 12800 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:47:53,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:47:53,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:47:53,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:47:57,604 INFO L124 PetriNetUnfolderBase]: 7548/13003 cut-off events. [2024-06-28 03:47:57,604 INFO L125 PetriNetUnfolderBase]: For 681663/681674 co-relation queries the response was YES. [2024-06-28 03:47:57,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98838 conditions, 13003 events. 7548/13003 cut-off events. For 681663/681674 co-relation queries the response was YES. Maximal size of possible extension queue 936. Compared 103244 event pairs, 2689 based on Foata normal form. 12/13013 useless extension candidates. Maximal degree in co-relation 98694. Up to 11659 conditions per place. [2024-06-28 03:47:57,785 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 474 selfloop transitions, 151 changer transitions 0/630 dead transitions. [2024-06-28 03:47:57,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 630 transitions, 14638 flow [2024-06-28 03:47:57,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:47:57,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:47:57,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-28 03:47:57,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-28 03:47:57,797 INFO L175 Difference]: Start difference. First operand has 306 places, 600 transitions, 12800 flow. Second operand 9 states and 150 transitions. [2024-06-28 03:47:57,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 630 transitions, 14638 flow [2024-06-28 03:48:01,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 630 transitions, 14375 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-28 03:48:01,921 INFO L231 Difference]: Finished difference. Result has 311 places, 608 transitions, 13158 flow [2024-06-28 03:48:01,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12537, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13158, PETRI_PLACES=311, PETRI_TRANSITIONS=608} [2024-06-28 03:48:01,922 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-28 03:48:01,922 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 608 transitions, 13158 flow [2024-06-28 03:48:01,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:48:01,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:48:01,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:48:01,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 03:48:01,923 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:48:01,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:48:01,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1728414142, now seen corresponding path program 2 times [2024-06-28 03:48:01,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:48:01,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178047700] [2024-06-28 03:48:01,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:48:01,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:48:01,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:48:04,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:48:04,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:48:04,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178047700] [2024-06-28 03:48:04,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178047700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:48:04,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:48:04,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:48:04,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161321779] [2024-06-28 03:48:04,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:48:04,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:48:04,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:48:04,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:48:04,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:48:04,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:48:04,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 608 transitions, 13158 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:48:04,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:48:04,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:48:04,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:48:08,450 INFO L124 PetriNetUnfolderBase]: 7219/12493 cut-off events. [2024-06-28 03:48:08,450 INFO L125 PetriNetUnfolderBase]: For 741382/741501 co-relation queries the response was YES. [2024-06-28 03:48:08,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97719 conditions, 12493 events. 7219/12493 cut-off events. For 741382/741501 co-relation queries the response was YES. Maximal size of possible extension queue 940. Compared 100084 event pairs, 3145 based on Foata normal form. 86/12472 useless extension candidates. Maximal degree in co-relation 97573. Up to 11341 conditions per place. [2024-06-28 03:48:08,645 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 537 selfloop transitions, 29 changer transitions 0/630 dead transitions. [2024-06-28 03:48:08,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 630 transitions, 14442 flow [2024-06-28 03:48:08,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:48:08,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:48:08,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-28 03:48:08,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-28 03:48:08,647 INFO L175 Difference]: Start difference. First operand has 311 places, 608 transitions, 13158 flow. Second operand 8 states and 134 transitions. [2024-06-28 03:48:08,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 630 transitions, 14442 flow [2024-06-28 03:48:12,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 630 transitions, 14098 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-28 03:48:12,921 INFO L231 Difference]: Finished difference. Result has 313 places, 610 transitions, 12976 flow [2024-06-28 03:48:12,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12814, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12976, PETRI_PLACES=313, PETRI_TRANSITIONS=610} [2024-06-28 03:48:12,922 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-28 03:48:12,922 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 610 transitions, 12976 flow [2024-06-28 03:48:12,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:48:12,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:48:12,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:48:12,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 03:48:12,923 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:48:12,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:48:12,923 INFO L85 PathProgramCache]: Analyzing trace with hash 679840224, now seen corresponding path program 5 times [2024-06-28 03:48:12,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:48:12,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094664049] [2024-06-28 03:48:12,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:48:12,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:48:13,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:48:14,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:48:14,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:48:14,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094664049] [2024-06-28 03:48:14,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094664049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:48:14,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:48:14,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:48:14,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696602773] [2024-06-28 03:48:14,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:48:14,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:48:14,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:48:14,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:48:14,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:48:14,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:48:14,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 610 transitions, 12976 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:48:14,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:48:14,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:48:14,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:48:19,520 INFO L124 PetriNetUnfolderBase]: 7560/13003 cut-off events. [2024-06-28 03:48:19,520 INFO L125 PetriNetUnfolderBase]: For 711198/711202 co-relation queries the response was YES. [2024-06-28 03:48:19,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100056 conditions, 13003 events. 7560/13003 cut-off events. For 711198/711202 co-relation queries the response was YES. Maximal size of possible extension queue 938. Compared 103021 event pairs, 2787 based on Foata normal form. 3/12990 useless extension candidates. Maximal degree in co-relation 99908. Up to 10102 conditions per place. [2024-06-28 03:48:19,688 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 332 selfloop transitions, 308 changer transitions 0/645 dead transitions. [2024-06-28 03:48:19,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 645 transitions, 14752 flow [2024-06-28 03:48:19,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:48:19,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:48:19,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-28 03:48:19,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-28 03:48:19,689 INFO L175 Difference]: Start difference. First operand has 313 places, 610 transitions, 12976 flow. Second operand 8 states and 140 transitions. [2024-06-28 03:48:19,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 645 transitions, 14752 flow [2024-06-28 03:48:23,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 645 transitions, 14552 flow, removed 74 selfloop flow, removed 6 redundant places. [2024-06-28 03:48:23,449 INFO L231 Difference]: Finished difference. Result has 316 places, 622 transitions, 13961 flow [2024-06-28 03:48:23,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12776, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13961, PETRI_PLACES=316, PETRI_TRANSITIONS=622} [2024-06-28 03:48:23,450 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-28 03:48:23,450 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 622 transitions, 13961 flow [2024-06-28 03:48:23,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:48:23,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:48:23,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:48:23,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 03:48:23,450 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:48:23,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:48:23,451 INFO L85 PathProgramCache]: Analyzing trace with hash 550027372, now seen corresponding path program 6 times [2024-06-28 03:48:23,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:48:23,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409574514] [2024-06-28 03:48:23,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:48:23,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:48:23,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:48:25,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:48:25,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:48:25,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409574514] [2024-06-28 03:48:25,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409574514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:48:25,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:48:25,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:48:25,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296475415] [2024-06-28 03:48:25,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:48:25,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:48:25,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:48:25,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:48:25,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:48:25,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:48:25,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 622 transitions, 13961 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:48:25,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:48:25,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:48:25,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:48:29,874 INFO L124 PetriNetUnfolderBase]: 7565/13031 cut-off events. [2024-06-28 03:48:29,875 INFO L125 PetriNetUnfolderBase]: For 773559/773559 co-relation queries the response was YES. [2024-06-28 03:48:30,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102556 conditions, 13031 events. 7565/13031 cut-off events. For 773559/773559 co-relation queries the response was YES. Maximal size of possible extension queue 942. Compared 103464 event pairs, 3765 based on Foata normal form. 1/13031 useless extension candidates. Maximal degree in co-relation 102406. Up to 12137 conditions per place. [2024-06-28 03:48:30,159 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 620 selfloop transitions, 15 changer transitions 0/640 dead transitions. [2024-06-28 03:48:30,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 640 transitions, 15339 flow [2024-06-28 03:48:30,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:48:30,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:48:30,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-28 03:48:30,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-28 03:48:30,160 INFO L175 Difference]: Start difference. First operand has 316 places, 622 transitions, 13961 flow. Second operand 7 states and 111 transitions. [2024-06-28 03:48:30,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 640 transitions, 15339 flow [2024-06-28 03:48:34,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 640 transitions, 14822 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-28 03:48:34,502 INFO L231 Difference]: Finished difference. Result has 316 places, 625 transitions, 13546 flow [2024-06-28 03:48:34,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13444, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13546, PETRI_PLACES=316, PETRI_TRANSITIONS=625} [2024-06-28 03:48:34,503 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-28 03:48:34,503 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 625 transitions, 13546 flow [2024-06-28 03:48:34,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:48:34,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:48:34,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:48:34,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 03:48:34,504 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:48:34,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:48:34,504 INFO L85 PathProgramCache]: Analyzing trace with hash -444952194, now seen corresponding path program 7 times [2024-06-28 03:48:34,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:48:34,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413554056] [2024-06-28 03:48:34,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:48:34,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:48:34,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:48:37,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:48:37,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:48:37,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413554056] [2024-06-28 03:48:37,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413554056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:48:37,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:48:37,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:48:37,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577032705] [2024-06-28 03:48:37,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:48:37,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:48:37,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:48:37,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:48:37,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:48:37,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:48:37,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 625 transitions, 13546 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:48:37,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:48:37,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:48:37,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:48:41,855 INFO L124 PetriNetUnfolderBase]: 7567/13025 cut-off events. [2024-06-28 03:48:41,855 INFO L125 PetriNetUnfolderBase]: For 754544/754589 co-relation queries the response was YES. [2024-06-28 03:48:41,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102052 conditions, 13025 events. 7567/13025 cut-off events. For 754544/754589 co-relation queries the response was YES. Maximal size of possible extension queue 938. Compared 103270 event pairs, 2715 based on Foata normal form. 22/13025 useless extension candidates. Maximal degree in co-relation 101901. Up to 11772 conditions per place. [2024-06-28 03:48:42,045 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 508 selfloop transitions, 127 changer transitions 0/640 dead transitions. [2024-06-28 03:48:42,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 640 transitions, 15068 flow [2024-06-28 03:48:42,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:48:42,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:48:42,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-28 03:48:42,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-28 03:48:42,046 INFO L175 Difference]: Start difference. First operand has 316 places, 625 transitions, 13546 flow. Second operand 7 states and 117 transitions. [2024-06-28 03:48:42,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 640 transitions, 15068 flow [2024-06-28 03:48:46,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 640 transitions, 14994 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-28 03:48:46,950 INFO L231 Difference]: Finished difference. Result has 318 places, 628 transitions, 13804 flow [2024-06-28 03:48:46,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13474, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13804, PETRI_PLACES=318, PETRI_TRANSITIONS=628} [2024-06-28 03:48:46,951 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-28 03:48:46,951 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 628 transitions, 13804 flow [2024-06-28 03:48:46,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:48:46,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:48:46,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:48:46,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 03:48:46,952 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:48:46,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:48:46,952 INFO L85 PathProgramCache]: Analyzing trace with hash -444802464, now seen corresponding path program 8 times [2024-06-28 03:48:46,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:48:46,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127681964] [2024-06-28 03:48:46,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:48:46,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:48:46,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:48:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:48:49,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:48:49,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127681964] [2024-06-28 03:48:49,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127681964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:48:49,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:48:49,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:48:49,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305758478] [2024-06-28 03:48:49,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:48:49,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:48:49,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:48:49,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:48:49,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:48:49,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:48:49,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 628 transitions, 13804 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:48:49,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:48:49,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:48:49,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:48:53,454 INFO L124 PetriNetUnfolderBase]: 7562/13029 cut-off events. [2024-06-28 03:48:53,455 INFO L125 PetriNetUnfolderBase]: For 755509/755512 co-relation queries the response was YES. [2024-06-28 03:48:53,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102289 conditions, 13029 events. 7562/13029 cut-off events. For 755509/755512 co-relation queries the response was YES. Maximal size of possible extension queue 941. Compared 103481 event pairs, 3771 based on Foata normal form. 3/13030 useless extension candidates. Maximal degree in co-relation 102137. Up to 12127 conditions per place.