./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe027_power.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe027_power.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe027_power.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe027_power.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 13:30:11,943 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 13:30:12,018 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 13:30:12,026 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 13:30:12,027 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 13:30:12,061 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 13:30:12,061 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 13:30:12,062 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 13:30:12,062 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 13:30:12,066 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 13:30:12,066 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 13:30:12,066 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 13:30:12,067 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 13:30:12,069 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 13:30:12,069 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 13:30:12,069 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 13:30:12,069 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 13:30:12,070 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 13:30:12,070 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 13:30:12,070 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 13:30:12,071 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 13:30:12,071 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 13:30:12,071 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 13:30:12,071 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 13:30:12,072 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 13:30:12,072 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 13:30:12,072 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 13:30:12,073 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 13:30:12,073 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 13:30:12,073 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 13:30:12,074 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 13:30:12,075 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 13:30:12,075 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:30:12,075 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 13:30:12,075 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 13:30:12,075 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 13:30:12,076 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 13:30:12,076 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 13:30:12,076 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 13:30:12,076 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 13:30:12,077 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 13:30:12,077 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 13:30:12,077 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 13:30:12,077 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 13:30:12,373 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 13:30:12,393 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 13:30:12,395 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 13:30:12,396 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 13:30:12,397 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 13:30:12,398 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe027_power.opt.yml/witness.yml [2024-06-14 13:30:12,662 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 13:30:12,663 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 13:30:12,664 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe027_power.opt.i [2024-06-14 13:30:13,853 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 13:30:14,175 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 13:30:14,176 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe027_power.opt.i [2024-06-14 13:30:14,192 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecd3fee45/3e568982ded94b12aa12166eb92bc9a2/FLAG7f4a2ddf4 [2024-06-14 13:30:14,208 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecd3fee45/3e568982ded94b12aa12166eb92bc9a2 [2024-06-14 13:30:14,208 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 13:30:14,209 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 13:30:14,212 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 13:30:14,212 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 13:30:14,217 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 13:30:14,217 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:30:12" (1/2) ... [2024-06-14 13:30:14,219 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a8de340 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:30:14, skipping insertion in model container [2024-06-14 13:30:14,219 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:30:12" (1/2) ... [2024-06-14 13:30:14,221 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3d8924d6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:30:14, skipping insertion in model container [2024-06-14 13:30:14,221 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:30:14" (2/2) ... [2024-06-14 13:30:14,222 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a8de340 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:30:14, skipping insertion in model container [2024-06-14 13:30:14,222 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:30:14" (2/2) ... [2024-06-14 13:30:14,222 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 13:30:14,453 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 13:30:14,454 INFO L97 edCorrectnessWitness]: Location invariant before [L887-L887] (((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 1) && __unbuffered_p2_EAX$read_delayed_var == & x) && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0) [2024-06-14 13:30:14,455 INFO L97 edCorrectnessWitness]: Location invariant before [L891-L891] (((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 1) && __unbuffered_p2_EAX$read_delayed_var == & x) && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0) [2024-06-14 13:30:14,455 INFO L97 edCorrectnessWitness]: Location invariant before [L889-L889] (((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 1) && __unbuffered_p2_EAX$read_delayed_var == & x) && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0) [2024-06-14 13:30:14,455 INFO L97 edCorrectnessWitness]: Location invariant before [L892-L892] (((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 1) && __unbuffered_p2_EAX$read_delayed_var == & x) && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0) [2024-06-14 13:30:14,455 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 13:30:14,455 INFO L106 edCorrectnessWitness]: ghost_update [L885-L885] multithreaded = 1; [2024-06-14 13:30:14,499 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 13:30:14,901 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:30:14,911 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 13:30:15,080 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:30:15,147 INFO L206 MainTranslator]: Completed translation [2024-06-14 13:30:15,147 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:30:15 WrapperNode [2024-06-14 13:30:15,148 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 13:30:15,149 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 13:30:15,149 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 13:30:15,149 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 13:30:15,155 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:30:15" (1/1) ... [2024-06-14 13:30:15,178 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:30:15" (1/1) ... [2024-06-14 13:30:15,218 INFO L138 Inliner]: procedures = 176, calls = 105, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 290 [2024-06-14 13:30:15,218 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 13:30:15,219 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 13:30:15,219 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 13:30:15,219 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 13:30:15,258 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:30:15" (1/1) ... [2024-06-14 13:30:15,259 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:30:15" (1/1) ... [2024-06-14 13:30:15,291 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:30:15" (1/1) ... [2024-06-14 13:30:15,332 INFO L175 MemorySlicer]: Split 58 memory accesses to 2 slices as follows [2, 56]. 97 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 8 writes are split as follows [0, 8]. [2024-06-14 13:30:15,333 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:30:15" (1/1) ... [2024-06-14 13:30:15,333 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:30:15" (1/1) ... [2024-06-14 13:30:15,366 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:30:15" (1/1) ... [2024-06-14 13:30:15,368 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:30:15" (1/1) ... [2024-06-14 13:30:15,371 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:30:15" (1/1) ... [2024-06-14 13:30:15,374 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:30:15" (1/1) ... [2024-06-14 13:30:15,388 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 13:30:15,389 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 13:30:15,389 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 13:30:15,389 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 13:30:15,390 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:30:15" (1/1) ... [2024-06-14 13:30:15,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:30:15,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 13:30:15,430 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 13:30:15,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 13:30:15,479 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-14 13:30:15,479 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-14 13:30:15,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-14 13:30:15,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-14 13:30:15,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 13:30:15,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 13:30:15,481 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 13:30:15,481 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 13:30:15,481 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 13:30:15,481 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 13:30:15,481 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 13:30:15,481 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 13:30:15,482 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-14 13:30:15,482 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-14 13:30:15,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 13:30:15,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-14 13:30:15,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 13:30:15,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 13:30:15,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 13:30:15,486 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 13:30:15,693 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 13:30:15,696 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 13:30:16,324 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 13:30:16,324 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 13:30:16,928 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 13:30:16,929 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 13:30:16,929 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:30:16 BoogieIcfgContainer [2024-06-14 13:30:16,929 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 13:30:16,932 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 13:30:16,932 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 13:30:16,935 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 13:30:16,935 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:30:12" (1/4) ... [2024-06-14 13:30:16,935 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b4c9a58 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:30:16, skipping insertion in model container [2024-06-14 13:30:16,936 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 01:30:14" (2/4) ... [2024-06-14 13:30:16,936 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b4c9a58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:30:16, skipping insertion in model container [2024-06-14 13:30:16,936 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:30:15" (3/4) ... [2024-06-14 13:30:16,937 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b4c9a58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:30:16, skipping insertion in model container [2024-06-14 13:30:16,937 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:30:16" (4/4) ... [2024-06-14 13:30:16,938 INFO L112 eAbstractionObserver]: Analyzing ICFG safe027_power.opt.i [2024-06-14 13:30:16,955 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 13:30:16,956 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-14 13:30:16,956 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 13:30:17,040 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 13:30:17,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-14 13:30:17,151 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-14 13:30:17,151 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:30:17,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 0/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 13:30:17,155 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-14 13:30:17,158 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-14 13:30:17,173 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 13:30:17,180 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;@3408ae71, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 13:30:17,180 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-14 13:30:17,186 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 13:30:17,186 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-14 13:30:17,187 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:30:17,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:17,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 13:30:17,188 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:30:17,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:17,194 INFO L85 PathProgramCache]: Analyzing trace with hash 659864087, now seen corresponding path program 1 times [2024-06-14 13:30:17,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:17,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724263664] [2024-06-14 13:30:17,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:17,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:17,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:19,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:19,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:19,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724263664] [2024-06-14 13:30:19,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724263664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:19,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:19,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 13:30:19,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048197970] [2024-06-14 13:30:19,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:19,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 13:30:19,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:19,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 13:30:19,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 13:30:19,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:30:19,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:19,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:19,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:30:19,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:22,227 INFO L124 PetriNetUnfolderBase]: 5551/7795 cut-off events. [2024-06-14 13:30:22,228 INFO L125 PetriNetUnfolderBase]: For 118/118 co-relation queries the response was YES. [2024-06-14 13:30:22,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15717 conditions, 7795 events. 5551/7795 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 41721 event pairs, 3349 based on Foata normal form. 2/7673 useless extension candidates. Maximal degree in co-relation 15701. Up to 7623 conditions per place. [2024-06-14 13:30:22,288 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 49 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2024-06-14 13:30:22,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 61 transitions, 251 flow [2024-06-14 13:30:22,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 13:30:22,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 13:30:22,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2024-06-14 13:30:22,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5723270440251572 [2024-06-14 13:30:22,301 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 91 transitions. [2024-06-14 13:30:22,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 61 transitions, 251 flow [2024-06-14 13:30:22,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 244 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 13:30:22,308 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-14 13:30:22,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-14 13:30:22,312 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-14 13:30:22,313 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-14 13:30:22,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:22,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:22,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:22,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 13:30:22,314 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:30:22,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:22,314 INFO L85 PathProgramCache]: Analyzing trace with hash 605825311, now seen corresponding path program 1 times [2024-06-14 13:30:22,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:22,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505992593] [2024-06-14 13:30:22,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:22,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:22,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:26,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:26,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:26,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505992593] [2024-06-14 13:30:26,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505992593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:26,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:26,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:30:26,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258403092] [2024-06-14 13:30:26,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:26,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:30:26,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:26,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:30:26,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:30:26,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:30:26,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:26,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:26,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:30:26,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:29,224 INFO L124 PetriNetUnfolderBase]: 7050/9850 cut-off events. [2024-06-14 13:30:29,225 INFO L125 PetriNetUnfolderBase]: For 1780/1780 co-relation queries the response was YES. [2024-06-14 13:30:29,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22574 conditions, 9850 events. 7050/9850 cut-off events. For 1780/1780 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 51531 event pairs, 3276 based on Foata normal form. 8/9851 useless extension candidates. Maximal degree in co-relation 22559. Up to 9559 conditions per place. [2024-06-14 13:30:29,290 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 60 selfloop transitions, 8 changer transitions 0/74 dead transitions. [2024-06-14 13:30:29,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 74 transitions, 337 flow [2024-06-14 13:30:29,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:30:29,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:30:29,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2024-06-14 13:30:29,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-06-14 13:30:29,297 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 112 transitions. [2024-06-14 13:30:29,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 74 transitions, 337 flow [2024-06-14 13:30:29,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 74 transitions, 332 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 13:30:29,307 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 168 flow [2024-06-14 13:30:29,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2024-06-14 13:30:29,310 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 1 predicate places. [2024-06-14 13:30:29,310 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 168 flow [2024-06-14 13:30:29,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:29,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:29,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:29,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 13:30:29,319 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:30:29,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:29,320 INFO L85 PathProgramCache]: Analyzing trace with hash 2018297710, now seen corresponding path program 1 times [2024-06-14 13:30:29,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:29,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428888181] [2024-06-14 13:30:29,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:29,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:29,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:31,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:31,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:31,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428888181] [2024-06-14 13:30:31,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428888181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:31,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:31,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:30:31,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642987672] [2024-06-14 13:30:31,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:31,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:30:31,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:31,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:30:31,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:30:31,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:30:31,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 168 flow. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 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) [2024-06-14 13:30:31,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:31,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:30:31,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:33,890 INFO L124 PetriNetUnfolderBase]: 5553/7820 cut-off events. [2024-06-14 13:30:33,890 INFO L125 PetriNetUnfolderBase]: For 3944/3944 co-relation queries the response was YES. [2024-06-14 13:30:33,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19746 conditions, 7820 events. 5553/7820 cut-off events. For 3944/3944 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 41943 event pairs, 3002 based on Foata normal form. 6/7823 useless extension candidates. Maximal degree in co-relation 19729. Up to 7613 conditions per place. [2024-06-14 13:30:33,928 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 63 selfloop transitions, 10 changer transitions 0/80 dead transitions. [2024-06-14 13:30:33,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 80 transitions, 408 flow [2024-06-14 13:30:33,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:30:33,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:30:33,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-14 13:30:33,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4679245283018868 [2024-06-14 13:30:33,934 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 168 flow. Second operand 5 states and 124 transitions. [2024-06-14 13:30:33,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 80 transitions, 408 flow [2024-06-14 13:30:33,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 80 transitions, 384 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-14 13:30:33,939 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 234 flow [2024-06-14 13:30:33,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=234, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2024-06-14 13:30:33,940 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 5 predicate places. [2024-06-14 13:30:33,941 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 234 flow [2024-06-14 13:30:33,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 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) [2024-06-14 13:30:33,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:33,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:33,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 13:30:33,942 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:30:33,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:33,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1875152364, now seen corresponding path program 1 times [2024-06-14 13:30:33,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:33,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918576750] [2024-06-14 13:30:33,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:33,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:33,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:36,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:36,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:36,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918576750] [2024-06-14 13:30:36,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918576750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:36,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:36,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:30:36,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866865688] [2024-06-14 13:30:36,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:36,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:30:36,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:36,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:30:36,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:30:36,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:30:36,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 234 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 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) [2024-06-14 13:30:36,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:36,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:30:36,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:39,051 INFO L124 PetriNetUnfolderBase]: 5544/7822 cut-off events. [2024-06-14 13:30:39,052 INFO L125 PetriNetUnfolderBase]: For 7876/7876 co-relation queries the response was YES. [2024-06-14 13:30:39,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22462 conditions, 7822 events. 5544/7822 cut-off events. For 7876/7876 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 41835 event pairs, 2892 based on Foata normal form. 3/7822 useless extension candidates. Maximal degree in co-relation 22442. Up to 7601 conditions per place. [2024-06-14 13:30:39,099 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 75 selfloop transitions, 14 changer transitions 0/96 dead transitions. [2024-06-14 13:30:39,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 96 transitions, 537 flow [2024-06-14 13:30:39,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:30:39,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:30:39,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 13:30:39,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2024-06-14 13:30:39,102 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 234 flow. Second operand 6 states and 147 transitions. [2024-06-14 13:30:39,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 96 transitions, 537 flow [2024-06-14 13:30:39,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 96 transitions, 506 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-14 13:30:39,110 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 310 flow [2024-06-14 13:30:39,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=310, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-06-14 13:30:39,112 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2024-06-14 13:30:39,112 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 310 flow [2024-06-14 13:30:39,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 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) [2024-06-14 13:30:39,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:39,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:39,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 13:30:39,114 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:30:39,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:39,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1999821557, now seen corresponding path program 1 times [2024-06-14 13:30:39,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:39,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634712542] [2024-06-14 13:30:39,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:39,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:39,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:42,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:42,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:42,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634712542] [2024-06-14 13:30:42,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634712542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:42,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:42,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:30:42,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376622920] [2024-06-14 13:30:42,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:42,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:30:42,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:42,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:30:42,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:30:42,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:30:42,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 310 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:42,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:42,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:30:42,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:44,625 INFO L124 PetriNetUnfolderBase]: 5756/8132 cut-off events. [2024-06-14 13:30:44,626 INFO L125 PetriNetUnfolderBase]: For 13245/13245 co-relation queries the response was YES. [2024-06-14 13:30:44,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25718 conditions, 8132 events. 5756/8132 cut-off events. For 13245/13245 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 43446 event pairs, 2787 based on Foata normal form. 39/8168 useless extension candidates. Maximal degree in co-relation 25695. Up to 7591 conditions per place. [2024-06-14 13:30:44,671 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 86 selfloop transitions, 24 changer transitions 0/117 dead transitions. [2024-06-14 13:30:44,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 117 transitions, 702 flow [2024-06-14 13:30:44,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:30:44,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:30:44,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-14 13:30:44,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48517520215633425 [2024-06-14 13:30:44,678 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 310 flow. Second operand 7 states and 180 transitions. [2024-06-14 13:30:44,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 117 transitions, 702 flow [2024-06-14 13:30:44,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 117 transitions, 679 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-14 13:30:44,688 INFO L231 Difference]: Finished difference. Result has 72 places, 72 transitions, 430 flow [2024-06-14 13:30:44,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=430, PETRI_PLACES=72, PETRI_TRANSITIONS=72} [2024-06-14 13:30:44,690 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 16 predicate places. [2024-06-14 13:30:44,690 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 72 transitions, 430 flow [2024-06-14 13:30:44,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:44,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:44,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:44,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 13:30:44,691 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:30:44,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:44,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1687431097, now seen corresponding path program 1 times [2024-06-14 13:30:44,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:44,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161191396] [2024-06-14 13:30:44,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:44,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:44,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:47,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:47,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:47,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161191396] [2024-06-14 13:30:47,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161191396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:47,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:47,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:30:47,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520813707] [2024-06-14 13:30:47,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:47,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:30:47,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:47,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:30:47,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:30:47,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:30:47,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 72 transitions, 430 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:47,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:47,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:30:47,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:49,765 INFO L124 PetriNetUnfolderBase]: 7229/10139 cut-off events. [2024-06-14 13:30:49,765 INFO L125 PetriNetUnfolderBase]: For 28009/28009 co-relation queries the response was YES. [2024-06-14 13:30:49,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35552 conditions, 10139 events. 7229/10139 cut-off events. For 28009/28009 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 53348 event pairs, 3192 based on Foata normal form. 3/10135 useless extension candidates. Maximal degree in co-relation 35526. Up to 9799 conditions per place. [2024-06-14 13:30:49,851 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 74 selfloop transitions, 20 changer transitions 0/100 dead transitions. [2024-06-14 13:30:49,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 100 transitions, 712 flow [2024-06-14 13:30:49,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:30:49,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:30:49,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-14 13:30:49,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4641509433962264 [2024-06-14 13:30:49,854 INFO L175 Difference]: Start difference. First operand has 72 places, 72 transitions, 430 flow. Second operand 5 states and 123 transitions. [2024-06-14 13:30:49,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 100 transitions, 712 flow [2024-06-14 13:30:49,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 100 transitions, 673 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-14 13:30:49,896 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 494 flow [2024-06-14 13:30:49,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=494, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2024-06-14 13:30:49,899 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 18 predicate places. [2024-06-14 13:30:49,899 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 494 flow [2024-06-14 13:30:49,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:49,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:49,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:49,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 13:30:49,900 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:30:49,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:49,901 INFO L85 PathProgramCache]: Analyzing trace with hash 869054877, now seen corresponding path program 1 times [2024-06-14 13:30:49,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:49,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621172599] [2024-06-14 13:30:49,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:49,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:49,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:53,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:53,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:53,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621172599] [2024-06-14 13:30:53,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621172599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:53,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:53,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:30:53,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296010262] [2024-06-14 13:30:53,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:53,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:30:53,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:53,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:30:53,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:30:53,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:30:53,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 494 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:53,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:53,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:30:53,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:55,516 INFO L124 PetriNetUnfolderBase]: 7256/10185 cut-off events. [2024-06-14 13:30:55,516 INFO L125 PetriNetUnfolderBase]: For 36566/36566 co-relation queries the response was YES. [2024-06-14 13:30:55,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38264 conditions, 10185 events. 7256/10185 cut-off events. For 36566/36566 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 53638 event pairs, 3082 based on Foata normal form. 3/10181 useless extension candidates. Maximal degree in co-relation 38236. Up to 9788 conditions per place. [2024-06-14 13:30:55,592 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 83 selfloop transitions, 25 changer transitions 0/114 dead transitions. [2024-06-14 13:30:55,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 114 transitions, 836 flow [2024-06-14 13:30:55,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:30:55,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:30:55,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-14 13:30:55,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46540880503144655 [2024-06-14 13:30:55,595 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 494 flow. Second operand 6 states and 148 transitions. [2024-06-14 13:30:55,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 114 transitions, 836 flow [2024-06-14 13:30:55,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 114 transitions, 793 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 13:30:55,639 INFO L231 Difference]: Finished difference. Result has 77 places, 80 transitions, 569 flow [2024-06-14 13:30:55,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=569, PETRI_PLACES=77, PETRI_TRANSITIONS=80} [2024-06-14 13:30:55,640 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 21 predicate places. [2024-06-14 13:30:55,640 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 80 transitions, 569 flow [2024-06-14 13:30:55,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:55,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:55,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:55,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 13:30:55,641 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:30:55,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:55,641 INFO L85 PathProgramCache]: Analyzing trace with hash -295030307, now seen corresponding path program 2 times [2024-06-14 13:30:55,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:55,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43039057] [2024-06-14 13:30:55,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:55,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:55,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:58,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:58,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:58,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43039057] [2024-06-14 13:30:58,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43039057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:58,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:58,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:30:58,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681191591] [2024-06-14 13:30:58,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:58,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:30:58,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:58,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:30:58,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:30:58,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:30:58,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 80 transitions, 569 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:58,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:58,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:30:58,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:01,538 INFO L124 PetriNetUnfolderBase]: 7247/10193 cut-off events. [2024-06-14 13:31:01,538 INFO L125 PetriNetUnfolderBase]: For 48167/48167 co-relation queries the response was YES. [2024-06-14 13:31:01,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40800 conditions, 10193 events. 7247/10193 cut-off events. For 48167/48167 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 54212 event pairs, 3082 based on Foata normal form. 3/10189 useless extension candidates. Maximal degree in co-relation 40771. Up to 9719 conditions per place. [2024-06-14 13:31:01,608 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 85 selfloop transitions, 36 changer transitions 0/127 dead transitions. [2024-06-14 13:31:01,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 127 transitions, 967 flow [2024-06-14 13:31:01,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:31:01,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:31:01,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 13:31:01,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609164420485175 [2024-06-14 13:31:01,610 INFO L175 Difference]: Start difference. First operand has 77 places, 80 transitions, 569 flow. Second operand 7 states and 171 transitions. [2024-06-14 13:31:01,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 127 transitions, 967 flow [2024-06-14 13:31:01,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 127 transitions, 902 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 13:31:01,647 INFO L231 Difference]: Finished difference. Result has 80 places, 84 transitions, 647 flow [2024-06-14 13:31:01,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=647, PETRI_PLACES=80, PETRI_TRANSITIONS=84} [2024-06-14 13:31:01,648 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 24 predicate places. [2024-06-14 13:31:01,648 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 84 transitions, 647 flow [2024-06-14 13:31:01,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:01,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:01,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:01,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 13:31:01,649 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:31:01,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:01,649 INFO L85 PathProgramCache]: Analyzing trace with hash -577230648, now seen corresponding path program 1 times [2024-06-14 13:31:01,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:01,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233552937] [2024-06-14 13:31:01,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:01,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:01,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:04,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:04,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:04,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233552937] [2024-06-14 13:31:04,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233552937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:04,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:04,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:31:04,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746388943] [2024-06-14 13:31:04,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:04,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:31:04,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:04,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:31:04,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:31:04,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:31:04,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 84 transitions, 647 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:04,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:04,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:31:04,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:06,316 INFO L124 PetriNetUnfolderBase]: 5737/8107 cut-off events. [2024-06-14 13:31:06,316 INFO L125 PetriNetUnfolderBase]: For 51067/51067 co-relation queries the response was YES. [2024-06-14 13:31:06,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35625 conditions, 8107 events. 5737/8107 cut-off events. For 51067/51067 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 43324 event pairs, 2612 based on Foata normal form. 8/8109 useless extension candidates. Maximal degree in co-relation 35595. Up to 7849 conditions per place. [2024-06-14 13:31:06,362 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 88 selfloop transitions, 13 changer transitions 0/108 dead transitions. [2024-06-14 13:31:06,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 108 transitions, 943 flow [2024-06-14 13:31:06,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:31:06,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:31:06,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-14 13:31:06,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45660377358490567 [2024-06-14 13:31:06,363 INFO L175 Difference]: Start difference. First operand has 80 places, 84 transitions, 647 flow. Second operand 5 states and 121 transitions. [2024-06-14 13:31:06,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 108 transitions, 943 flow [2024-06-14 13:31:06,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 108 transitions, 832 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 13:31:06,388 INFO L231 Difference]: Finished difference. Result has 80 places, 88 transitions, 620 flow [2024-06-14 13:31:06,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=620, PETRI_PLACES=80, PETRI_TRANSITIONS=88} [2024-06-14 13:31:06,389 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 24 predicate places. [2024-06-14 13:31:06,389 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 88 transitions, 620 flow [2024-06-14 13:31:06,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:06,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:06,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:06,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 13:31:06,390 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:31:06,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:06,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1472238912, now seen corresponding path program 1 times [2024-06-14 13:31:06,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:06,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239073552] [2024-06-14 13:31:06,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:06,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:06,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:08,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:08,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:08,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239073552] [2024-06-14 13:31:08,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239073552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:08,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:08,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:31:08,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546558798] [2024-06-14 13:31:08,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:08,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:31:08,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:08,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:31:08,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:31:08,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:31:08,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 88 transitions, 620 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:08,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:08,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:31:08,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:11,520 INFO L124 PetriNetUnfolderBase]: 7249/10189 cut-off events. [2024-06-14 13:31:11,521 INFO L125 PetriNetUnfolderBase]: For 70427/70427 co-relation queries the response was YES. [2024-06-14 13:31:11,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45500 conditions, 10189 events. 7249/10189 cut-off events. For 70427/70427 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 53820 event pairs, 2299 based on Foata normal form. 6/10188 useless extension candidates. Maximal degree in co-relation 45469. Up to 9818 conditions per place. [2024-06-14 13:31:11,582 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 104 selfloop transitions, 15 changer transitions 0/125 dead transitions. [2024-06-14 13:31:11,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 125 transitions, 984 flow [2024-06-14 13:31:11,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:31:11,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:31:11,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-14 13:31:11,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528301886792453 [2024-06-14 13:31:11,585 INFO L175 Difference]: Start difference. First operand has 80 places, 88 transitions, 620 flow. Second operand 6 states and 144 transitions. [2024-06-14 13:31:11,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 125 transitions, 984 flow [2024-06-14 13:31:11,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 125 transitions, 932 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-14 13:31:11,635 INFO L231 Difference]: Finished difference. Result has 83 places, 91 transitions, 658 flow [2024-06-14 13:31:11,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=658, PETRI_PLACES=83, PETRI_TRANSITIONS=91} [2024-06-14 13:31:11,636 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 27 predicate places. [2024-06-14 13:31:11,636 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 91 transitions, 658 flow [2024-06-14 13:31:11,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:11,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:11,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:11,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 13:31:11,637 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:31:11,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:11,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1170895148, now seen corresponding path program 2 times [2024-06-14 13:31:11,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:11,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282820463] [2024-06-14 13:31:11,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:11,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:11,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:14,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:14,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:14,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282820463] [2024-06-14 13:31:14,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282820463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:14,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:14,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:31:14,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762007564] [2024-06-14 13:31:14,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:14,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:31:14,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:14,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:31:14,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:31:14,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:31:14,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 91 transitions, 658 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:14,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:14,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:31:14,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:16,818 INFO L124 PetriNetUnfolderBase]: 7234/10164 cut-off events. [2024-06-14 13:31:16,818 INFO L125 PetriNetUnfolderBase]: For 81519/81519 co-relation queries the response was YES. [2024-06-14 13:31:16,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47041 conditions, 10164 events. 7234/10164 cut-off events. For 81519/81519 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 53629 event pairs, 2805 based on Foata normal form. 6/10163 useless extension candidates. Maximal degree in co-relation 47009. Up to 9737 conditions per place. [2024-06-14 13:31:16,876 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 99 selfloop transitions, 25 changer transitions 0/130 dead transitions. [2024-06-14 13:31:16,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 130 transitions, 1060 flow [2024-06-14 13:31:16,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:31:16,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:31:16,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-14 13:31:16,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4591194968553459 [2024-06-14 13:31:16,878 INFO L175 Difference]: Start difference. First operand has 83 places, 91 transitions, 658 flow. Second operand 6 states and 146 transitions. [2024-06-14 13:31:16,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 130 transitions, 1060 flow [2024-06-14 13:31:16,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 130 transitions, 996 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-14 13:31:16,935 INFO L231 Difference]: Finished difference. Result has 85 places, 96 transitions, 739 flow [2024-06-14 13:31:16,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=739, PETRI_PLACES=85, PETRI_TRANSITIONS=96} [2024-06-14 13:31:16,936 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 29 predicate places. [2024-06-14 13:31:16,936 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 96 transitions, 739 flow [2024-06-14 13:31:16,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:16,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:16,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:16,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 13:31:16,937 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:31:16,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:16,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1170900108, now seen corresponding path program 1 times [2024-06-14 13:31:16,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:16,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129123208] [2024-06-14 13:31:16,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:16,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:16,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:20,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:20,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:20,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129123208] [2024-06-14 13:31:20,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129123208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:20,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:20,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:31:20,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717374244] [2024-06-14 13:31:20,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:20,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:31:20,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:20,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:31:20,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:31:20,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:31:20,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 96 transitions, 739 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:20,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:20,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:31:20,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:23,023 INFO L124 PetriNetUnfolderBase]: 7390/10430 cut-off events. [2024-06-14 13:31:23,024 INFO L125 PetriNetUnfolderBase]: For 99779/99779 co-relation queries the response was YES. [2024-06-14 13:31:23,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50402 conditions, 10430 events. 7390/10430 cut-off events. For 99779/99779 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 55460 event pairs, 2516 based on Foata normal form. 24/10447 useless extension candidates. Maximal degree in co-relation 50369. Up to 9713 conditions per place. [2024-06-14 13:31:23,110 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 112 selfloop transitions, 30 changer transitions 0/148 dead transitions. [2024-06-14 13:31:23,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 148 transitions, 1231 flow [2024-06-14 13:31:23,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:31:23,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:31:23,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 13:31:23,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716981132075472 [2024-06-14 13:31:23,112 INFO L175 Difference]: Start difference. First operand has 85 places, 96 transitions, 739 flow. Second operand 7 states and 175 transitions. [2024-06-14 13:31:23,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 148 transitions, 1231 flow [2024-06-14 13:31:23,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 148 transitions, 1136 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-14 13:31:23,187 INFO L231 Difference]: Finished difference. Result has 88 places, 100 transitions, 798 flow [2024-06-14 13:31:23,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=798, PETRI_PLACES=88, PETRI_TRANSITIONS=100} [2024-06-14 13:31:23,187 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 32 predicate places. [2024-06-14 13:31:23,187 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 100 transitions, 798 flow [2024-06-14 13:31:23,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:23,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:23,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:23,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 13:31:23,188 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:31:23,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:23,189 INFO L85 PathProgramCache]: Analyzing trace with hash -558374302, now seen corresponding path program 2 times [2024-06-14 13:31:23,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:23,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091973841] [2024-06-14 13:31:23,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:23,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:23,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:26,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:26,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:26,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091973841] [2024-06-14 13:31:26,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091973841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:26,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:26,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:31:26,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669375772] [2024-06-14 13:31:26,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:26,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:31:26,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:26,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:31:26,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:31:26,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:31:26,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 100 transitions, 798 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:26,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:26,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:31:26,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:29,399 INFO L124 PetriNetUnfolderBase]: 7653/10831 cut-off events. [2024-06-14 13:31:29,399 INFO L125 PetriNetUnfolderBase]: For 119036/119044 co-relation queries the response was YES. [2024-06-14 13:31:29,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54391 conditions, 10831 events. 7653/10831 cut-off events. For 119036/119044 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 58109 event pairs, 2639 based on Foata normal form. 24/10851 useless extension candidates. Maximal degree in co-relation 54357. Up to 9674 conditions per place. [2024-06-14 13:31:29,453 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 127 selfloop transitions, 35 changer transitions 0/168 dead transitions. [2024-06-14 13:31:29,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 168 transitions, 1486 flow [2024-06-14 13:31:29,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:31:29,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:31:29,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-14 13:31:29,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47641509433962265 [2024-06-14 13:31:29,455 INFO L175 Difference]: Start difference. First operand has 88 places, 100 transitions, 798 flow. Second operand 8 states and 202 transitions. [2024-06-14 13:31:29,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 168 transitions, 1486 flow [2024-06-14 13:31:29,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 168 transitions, 1418 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 13:31:29,522 INFO L231 Difference]: Finished difference. Result has 91 places, 104 transitions, 913 flow [2024-06-14 13:31:29,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=730, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=913, PETRI_PLACES=91, PETRI_TRANSITIONS=104} [2024-06-14 13:31:29,523 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 35 predicate places. [2024-06-14 13:31:29,523 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 104 transitions, 913 flow [2024-06-14 13:31:29,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:29,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:29,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:29,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 13:31:29,524 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:31:29,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:29,525 INFO L85 PathProgramCache]: Analyzing trace with hash -558380812, now seen corresponding path program 3 times [2024-06-14 13:31:29,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:29,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576429533] [2024-06-14 13:31:29,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:29,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:29,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:32,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:32,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:32,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576429533] [2024-06-14 13:31:32,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576429533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:32,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:32,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:31:32,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51978807] [2024-06-14 13:31:32,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:32,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:31:32,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:32,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:31:32,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:31:32,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:31:32,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 104 transitions, 913 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:32,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:32,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:31:32,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:35,886 INFO L124 PetriNetUnfolderBase]: 7599/10761 cut-off events. [2024-06-14 13:31:35,886 INFO L125 PetriNetUnfolderBase]: For 131613/131621 co-relation queries the response was YES. [2024-06-14 13:31:35,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54938 conditions, 10761 events. 7599/10761 cut-off events. For 131613/131621 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 58000 event pairs, 2829 based on Foata normal form. 30/10787 useless extension candidates. Maximal degree in co-relation 54903. Up to 10102 conditions per place. [2024-06-14 13:31:35,953 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 133 selfloop transitions, 31 changer transitions 0/170 dead transitions. [2024-06-14 13:31:35,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 170 transitions, 1423 flow [2024-06-14 13:31:35,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:31:35,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:31:35,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-14 13:31:35,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4570230607966457 [2024-06-14 13:31:35,956 INFO L175 Difference]: Start difference. First operand has 91 places, 104 transitions, 913 flow. Second operand 9 states and 218 transitions. [2024-06-14 13:31:35,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 170 transitions, 1423 flow [2024-06-14 13:31:36,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 170 transitions, 1363 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 13:31:36,069 INFO L231 Difference]: Finished difference. Result has 96 places, 105 transitions, 935 flow [2024-06-14 13:31:36,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=935, PETRI_PLACES=96, PETRI_TRANSITIONS=105} [2024-06-14 13:31:36,069 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 40 predicate places. [2024-06-14 13:31:36,069 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 105 transitions, 935 flow [2024-06-14 13:31:36,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:36,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:36,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:36,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 13:31:36,070 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:31:36,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:36,071 INFO L85 PathProgramCache]: Analyzing trace with hash 570661908, now seen corresponding path program 1 times [2024-06-14 13:31:36,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:36,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816497400] [2024-06-14 13:31:36,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:36,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:36,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:39,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:39,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:39,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816497400] [2024-06-14 13:31:39,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816497400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:39,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:39,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:31:39,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088775061] [2024-06-14 13:31:39,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:39,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:31:39,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:39,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:31:39,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:31:39,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:31:39,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 105 transitions, 935 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:39,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:39,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:31:39,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:42,019 INFO L124 PetriNetUnfolderBase]: 7711/10931 cut-off events. [2024-06-14 13:31:42,019 INFO L125 PetriNetUnfolderBase]: For 143591/143591 co-relation queries the response was YES. [2024-06-14 13:31:42,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56660 conditions, 10931 events. 7711/10931 cut-off events. For 143591/143591 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 59231 event pairs, 2082 based on Foata normal form. 18/10930 useless extension candidates. Maximal degree in co-relation 56623. Up to 10384 conditions per place. [2024-06-14 13:31:42,094 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 130 selfloop transitions, 17 changer transitions 0/153 dead transitions. [2024-06-14 13:31:42,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 153 transitions, 1401 flow [2024-06-14 13:31:42,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:31:42,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:31:42,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-14 13:31:42,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528301886792453 [2024-06-14 13:31:42,096 INFO L175 Difference]: Start difference. First operand has 96 places, 105 transitions, 935 flow. Second operand 7 states and 168 transitions. [2024-06-14 13:31:42,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 153 transitions, 1401 flow [2024-06-14 13:31:42,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 153 transitions, 1314 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-14 13:31:42,209 INFO L231 Difference]: Finished difference. Result has 94 places, 107 transitions, 949 flow [2024-06-14 13:31:42,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=848, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=949, PETRI_PLACES=94, PETRI_TRANSITIONS=107} [2024-06-14 13:31:42,210 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 38 predicate places. [2024-06-14 13:31:42,210 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 107 transitions, 949 flow [2024-06-14 13:31:42,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:42,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:42,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:42,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 13:31:42,211 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:31:42,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:42,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1938013886, now seen corresponding path program 2 times [2024-06-14 13:31:42,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:42,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070312321] [2024-06-14 13:31:42,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:42,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:42,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:45,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:45,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:45,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070312321] [2024-06-14 13:31:45,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070312321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:45,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:45,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:31:45,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606932746] [2024-06-14 13:31:45,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:45,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:31:45,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:45,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:31:45,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:31:45,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:31:45,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 107 transitions, 949 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:45,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:45,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:31:45,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:48,222 INFO L124 PetriNetUnfolderBase]: 7784/11058 cut-off events. [2024-06-14 13:31:48,222 INFO L125 PetriNetUnfolderBase]: For 155402/155402 co-relation queries the response was YES. [2024-06-14 13:31:48,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57930 conditions, 11058 events. 7784/11058 cut-off events. For 155402/155402 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 60242 event pairs, 2731 based on Foata normal form. 18/11069 useless extension candidates. Maximal degree in co-relation 57893. Up to 10295 conditions per place. [2024-06-14 13:31:48,306 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 120 selfloop transitions, 30 changer transitions 0/156 dead transitions. [2024-06-14 13:31:48,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 156 transitions, 1425 flow [2024-06-14 13:31:48,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:31:48,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:31:48,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 13:31:48,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4555256064690027 [2024-06-14 13:31:48,308 INFO L175 Difference]: Start difference. First operand has 94 places, 107 transitions, 949 flow. Second operand 7 states and 169 transitions. [2024-06-14 13:31:48,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 156 transitions, 1425 flow [2024-06-14 13:31:48,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 156 transitions, 1356 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 13:31:48,430 INFO L231 Difference]: Finished difference. Result has 95 places, 110 transitions, 1016 flow [2024-06-14 13:31:48,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=848, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1016, PETRI_PLACES=95, PETRI_TRANSITIONS=110} [2024-06-14 13:31:48,430 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 39 predicate places. [2024-06-14 13:31:48,431 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 110 transitions, 1016 flow [2024-06-14 13:31:48,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:48,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:48,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:48,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 13:31:48,431 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:31:48,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:48,432 INFO L85 PathProgramCache]: Analyzing trace with hash -672546905, now seen corresponding path program 1 times [2024-06-14 13:31:48,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:48,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304088401] [2024-06-14 13:31:48,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:48,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:48,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:51,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:51,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:51,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304088401] [2024-06-14 13:31:51,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304088401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:51,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:51,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:31:51,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712043956] [2024-06-14 13:31:51,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:51,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:31:51,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:51,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:31:51,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:31:51,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:31:51,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 110 transitions, 1016 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:51,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:51,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:31:51,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:54,042 INFO L124 PetriNetUnfolderBase]: 6392/9142 cut-off events. [2024-06-14 13:31:54,042 INFO L125 PetriNetUnfolderBase]: For 146558/146558 co-relation queries the response was YES. [2024-06-14 13:31:54,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50105 conditions, 9142 events. 6392/9142 cut-off events. For 146558/146558 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 50526 event pairs, 2380 based on Foata normal form. 8/9147 useless extension candidates. Maximal degree in co-relation 50067. Up to 8839 conditions per place. [2024-06-14 13:31:54,099 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 118 selfloop transitions, 18 changer transitions 0/143 dead transitions. [2024-06-14 13:31:54,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 143 transitions, 1426 flow [2024-06-14 13:31:54,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:31:54,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:31:54,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-14 13:31:54,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528301886792453 [2024-06-14 13:31:54,101 INFO L175 Difference]: Start difference. First operand has 95 places, 110 transitions, 1016 flow. Second operand 6 states and 144 transitions. [2024-06-14 13:31:54,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 143 transitions, 1426 flow [2024-06-14 13:31:54,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 143 transitions, 1322 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-14 13:31:54,197 INFO L231 Difference]: Finished difference. Result has 96 places, 115 transitions, 1039 flow [2024-06-14 13:31:54,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=912, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1039, PETRI_PLACES=96, PETRI_TRANSITIONS=115} [2024-06-14 13:31:54,197 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 40 predicate places. [2024-06-14 13:31:54,197 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 115 transitions, 1039 flow [2024-06-14 13:31:54,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:54,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:54,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:54,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 13:31:54,198 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:31:54,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:54,199 INFO L85 PathProgramCache]: Analyzing trace with hash -169083965, now seen corresponding path program 2 times [2024-06-14 13:31:54,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:54,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35702929] [2024-06-14 13:31:54,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:54,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:54,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:56,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:56,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:56,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35702929] [2024-06-14 13:31:56,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35702929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:56,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:56,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:31:56,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407789568] [2024-06-14 13:31:56,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:56,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:31:56,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:56,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:31:56,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:31:56,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:31:56,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 115 transitions, 1039 flow. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:56,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:56,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:31:56,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:59,128 INFO L124 PetriNetUnfolderBase]: 6442/9198 cut-off events. [2024-06-14 13:31:59,128 INFO L125 PetriNetUnfolderBase]: For 159097/159097 co-relation queries the response was YES. [2024-06-14 13:31:59,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52380 conditions, 9198 events. 6442/9198 cut-off events. For 159097/159097 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 50664 event pairs, 2357 based on Foata normal form. 8/9200 useless extension candidates. Maximal degree in co-relation 52341. Up to 8876 conditions per place. [2024-06-14 13:31:59,185 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 125 selfloop transitions, 17 changer transitions 0/149 dead transitions. [2024-06-14 13:31:59,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 149 transitions, 1485 flow [2024-06-14 13:31:59,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:31:59,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:31:59,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-14 13:31:59,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44339622641509435 [2024-06-14 13:31:59,187 INFO L175 Difference]: Start difference. First operand has 96 places, 115 transitions, 1039 flow. Second operand 6 states and 141 transitions. [2024-06-14 13:31:59,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 149 transitions, 1485 flow [2024-06-14 13:31:59,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 149 transitions, 1396 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-14 13:31:59,274 INFO L231 Difference]: Finished difference. Result has 99 places, 123 transitions, 1099 flow [2024-06-14 13:31:59,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=950, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1099, PETRI_PLACES=99, PETRI_TRANSITIONS=123} [2024-06-14 13:31:59,275 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 43 predicate places. [2024-06-14 13:31:59,275 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 123 transitions, 1099 flow [2024-06-14 13:31:59,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:59,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:59,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:59,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 13:31:59,276 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:31:59,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:59,276 INFO L85 PathProgramCache]: Analyzing trace with hash 625794971, now seen corresponding path program 1 times [2024-06-14 13:31:59,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:59,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012630125] [2024-06-14 13:31:59,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:59,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:59,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:02,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:02,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:02,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012630125] [2024-06-14 13:32:02,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012630125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:02,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:02,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:32:02,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91720992] [2024-06-14 13:32:02,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:02,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:32:02,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:02,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:32:02,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:32:02,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:32:02,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 123 transitions, 1099 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:02,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:02,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:32:02,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:04,791 INFO L124 PetriNetUnfolderBase]: 6532/9323 cut-off events. [2024-06-14 13:32:04,792 INFO L125 PetriNetUnfolderBase]: For 175909/175909 co-relation queries the response was YES. [2024-06-14 13:32:04,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55372 conditions, 9323 events. 6532/9323 cut-off events. For 175909/175909 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 51515 event pairs, 2364 based on Foata normal form. 4/9321 useless extension candidates. Maximal degree in co-relation 55331. Up to 8946 conditions per place. [2024-06-14 13:32:04,858 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 147 selfloop transitions, 34 changer transitions 0/188 dead transitions. [2024-06-14 13:32:04,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 188 transitions, 2024 flow [2024-06-14 13:32:04,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:32:04,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:32:04,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 13:32:04,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4743935309973046 [2024-06-14 13:32:04,860 INFO L175 Difference]: Start difference. First operand has 99 places, 123 transitions, 1099 flow. Second operand 7 states and 176 transitions. [2024-06-14 13:32:04,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 188 transitions, 2024 flow [2024-06-14 13:32:04,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 188 transitions, 1902 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-14 13:32:04,958 INFO L231 Difference]: Finished difference. Result has 105 places, 144 transitions, 1403 flow [2024-06-14 13:32:04,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1022, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1403, PETRI_PLACES=105, PETRI_TRANSITIONS=144} [2024-06-14 13:32:04,959 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 49 predicate places. [2024-06-14 13:32:04,959 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 144 transitions, 1403 flow [2024-06-14 13:32:04,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:04,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:04,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:32:04,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 13:32:04,960 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:32:04,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:04,960 INFO L85 PathProgramCache]: Analyzing trace with hash -952139393, now seen corresponding path program 2 times [2024-06-14 13:32:04,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:04,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239788415] [2024-06-14 13:32:04,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:04,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:04,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:09,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:09,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:09,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239788415] [2024-06-14 13:32:09,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239788415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:09,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:09,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:32:09,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699824669] [2024-06-14 13:32:09,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:09,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:32:09,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:09,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:32:09,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:32:09,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:32:09,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 144 transitions, 1403 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:09,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:09,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:32:09,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:11,763 INFO L124 PetriNetUnfolderBase]: 6556/9358 cut-off events. [2024-06-14 13:32:11,764 INFO L125 PetriNetUnfolderBase]: For 198874/198874 co-relation queries the response was YES. [2024-06-14 13:32:11,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58026 conditions, 9358 events. 6556/9358 cut-off events. For 198874/198874 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 51917 event pairs, 2338 based on Foata normal form. 8/9363 useless extension candidates. Maximal degree in co-relation 57982. Up to 8999 conditions per place. [2024-06-14 13:32:11,832 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 153 selfloop transitions, 23 changer transitions 0/183 dead transitions. [2024-06-14 13:32:11,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 183 transitions, 1933 flow [2024-06-14 13:32:11,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:32:11,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:32:11,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-14 13:32:11,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4474393530997305 [2024-06-14 13:32:11,834 INFO L175 Difference]: Start difference. First operand has 105 places, 144 transitions, 1403 flow. Second operand 7 states and 166 transitions. [2024-06-14 13:32:11,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 183 transitions, 1933 flow [2024-06-14 13:32:11,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 183 transitions, 1863 flow, removed 34 selfloop flow, removed 1 redundant places. [2024-06-14 13:32:11,965 INFO L231 Difference]: Finished difference. Result has 111 places, 149 transitions, 1491 flow [2024-06-14 13:32:11,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1335, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1491, PETRI_PLACES=111, PETRI_TRANSITIONS=149} [2024-06-14 13:32:11,966 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 55 predicate places. [2024-06-14 13:32:11,966 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 149 transitions, 1491 flow [2024-06-14 13:32:11,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:11,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:11,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:32:11,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 13:32:11,966 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:32:11,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:11,967 INFO L85 PathProgramCache]: Analyzing trace with hash -946632863, now seen corresponding path program 3 times [2024-06-14 13:32:11,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:11,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063110994] [2024-06-14 13:32:11,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:11,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:11,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:15,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:15,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:15,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063110994] [2024-06-14 13:32:15,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063110994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:15,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:15,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:32:15,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619839305] [2024-06-14 13:32:15,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:15,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:32:15,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:15,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:32:15,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:32:15,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:32:15,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 149 transitions, 1491 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:15,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:15,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:32:15,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:18,413 INFO L124 PetriNetUnfolderBase]: 7659/10852 cut-off events. [2024-06-14 13:32:18,413 INFO L125 PetriNetUnfolderBase]: For 257457/257457 co-relation queries the response was YES. [2024-06-14 13:32:18,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71563 conditions, 10852 events. 7659/10852 cut-off events. For 257457/257457 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 59849 event pairs, 2331 based on Foata normal form. 8/10854 useless extension candidates. Maximal degree in co-relation 71516. Up to 9400 conditions per place. [2024-06-14 13:32:18,499 INFO L140 encePairwiseOnDemand]: 37/53 looper letters, 143 selfloop transitions, 72 changer transitions 0/222 dead transitions. [2024-06-14 13:32:18,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 222 transitions, 2597 flow [2024-06-14 13:32:18,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:32:18,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:32:18,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-14 13:32:18,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44654088050314467 [2024-06-14 13:32:18,501 INFO L175 Difference]: Start difference. First operand has 111 places, 149 transitions, 1491 flow. Second operand 9 states and 213 transitions. [2024-06-14 13:32:18,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 222 transitions, 2597 flow [2024-06-14 13:32:18,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 222 transitions, 2437 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-14 13:32:18,807 INFO L231 Difference]: Finished difference. Result has 117 places, 176 transitions, 1951 flow [2024-06-14 13:32:18,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1333, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1951, PETRI_PLACES=117, PETRI_TRANSITIONS=176} [2024-06-14 13:32:18,808 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 61 predicate places. [2024-06-14 13:32:18,808 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 176 transitions, 1951 flow [2024-06-14 13:32:18,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:18,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:18,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:32:18,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 13:32:18,809 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:32:18,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:18,809 INFO L85 PathProgramCache]: Analyzing trace with hash 773710262, now seen corresponding path program 1 times [2024-06-14 13:32:18,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:18,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515763513] [2024-06-14 13:32:18,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:18,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:18,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:23,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:23,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515763513] [2024-06-14 13:32:23,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515763513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:23,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:23,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:32:23,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440136205] [2024-06-14 13:32:23,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:23,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:32:23,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:23,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:32:23,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:32:23,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:32:23,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 176 transitions, 1951 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:23,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:23,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:32:23,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:26,809 INFO L124 PetriNetUnfolderBase]: 9231/12827 cut-off events. [2024-06-14 13:32:26,809 INFO L125 PetriNetUnfolderBase]: For 344870/344870 co-relation queries the response was YES. [2024-06-14 13:32:26,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90604 conditions, 12827 events. 9231/12827 cut-off events. For 344870/344870 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 68987 event pairs, 3239 based on Foata normal form. 24/12845 useless extension candidates. Maximal degree in co-relation 90554. Up to 12447 conditions per place. [2024-06-14 13:32:26,907 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 182 selfloop transitions, 30 changer transitions 0/218 dead transitions. [2024-06-14 13:32:26,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 218 transitions, 2622 flow [2024-06-14 13:32:26,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:32:26,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:32:26,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-14 13:32:26,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:32:26,909 INFO L175 Difference]: Start difference. First operand has 117 places, 176 transitions, 1951 flow. Second operand 7 states and 159 transitions. [2024-06-14 13:32:26,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 218 transitions, 2622 flow [2024-06-14 13:32:27,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 218 transitions, 2480 flow, removed 56 selfloop flow, removed 3 redundant places. [2024-06-14 13:32:27,309 INFO L231 Difference]: Finished difference. Result has 122 places, 184 transitions, 2003 flow [2024-06-14 13:32:27,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1814, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2003, PETRI_PLACES=122, PETRI_TRANSITIONS=184} [2024-06-14 13:32:27,309 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 66 predicate places. [2024-06-14 13:32:27,310 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 184 transitions, 2003 flow [2024-06-14 13:32:27,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:27,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:27,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:32:27,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 13:32:27,310 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:32:27,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:27,311 INFO L85 PathProgramCache]: Analyzing trace with hash -2075250042, now seen corresponding path program 1 times [2024-06-14 13:32:27,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:27,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564042790] [2024-06-14 13:32:27,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:27,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:27,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:30,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:30,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:30,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564042790] [2024-06-14 13:32:30,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564042790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:30,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:30,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:32:30,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887671793] [2024-06-14 13:32:30,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:30,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:32:30,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:30,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:32:30,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:32:31,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:32:31,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 184 transitions, 2003 flow. Second operand has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:31,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:31,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:32:31,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:34,969 INFO L124 PetriNetUnfolderBase]: 10117/14374 cut-off events. [2024-06-14 13:32:34,969 INFO L125 PetriNetUnfolderBase]: For 420823/420823 co-relation queries the response was YES. [2024-06-14 13:32:35,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103648 conditions, 14374 events. 10117/14374 cut-off events. For 420823/420823 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 82953 event pairs, 3079 based on Foata normal form. 80/14451 useless extension candidates. Maximal degree in co-relation 103595. Up to 11973 conditions per place. [2024-06-14 13:32:35,092 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 212 selfloop transitions, 36 changer transitions 0/256 dead transitions. [2024-06-14 13:32:35,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 256 transitions, 3156 flow [2024-06-14 13:32:35,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:32:35,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:32:35,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-14 13:32:35,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-14 13:32:35,094 INFO L175 Difference]: Start difference. First operand has 122 places, 184 transitions, 2003 flow. Second operand 8 states and 208 transitions. [2024-06-14 13:32:35,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 256 transitions, 3156 flow [2024-06-14 13:32:35,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 256 transitions, 3084 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 13:32:35,497 INFO L231 Difference]: Finished difference. Result has 127 places, 192 transitions, 2251 flow [2024-06-14 13:32:35,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1931, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2251, PETRI_PLACES=127, PETRI_TRANSITIONS=192} [2024-06-14 13:32:35,497 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 71 predicate places. [2024-06-14 13:32:35,497 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 192 transitions, 2251 flow [2024-06-14 13:32:35,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:35,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:35,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:32:35,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 13:32:35,498 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:32:35,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:35,498 INFO L85 PathProgramCache]: Analyzing trace with hash -2075189592, now seen corresponding path program 2 times [2024-06-14 13:32:35,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:35,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014048713] [2024-06-14 13:32:35,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:35,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:35,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:39,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:39,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:39,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014048713] [2024-06-14 13:32:39,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014048713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:39,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:39,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:32:39,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037674081] [2024-06-14 13:32:39,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:39,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:32:39,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:39,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:32:39,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:32:39,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:32:39,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 192 transitions, 2251 flow. Second operand has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:39,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:39,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:32:39,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:43,337 INFO L124 PetriNetUnfolderBase]: 10061/14295 cut-off events. [2024-06-14 13:32:43,338 INFO L125 PetriNetUnfolderBase]: For 448928/448928 co-relation queries the response was YES. [2024-06-14 13:32:43,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106405 conditions, 14295 events. 10061/14295 cut-off events. For 448928/448928 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 82893 event pairs, 3477 based on Foata normal form. 20/14307 useless extension candidates. Maximal degree in co-relation 106350. Up to 13658 conditions per place. [2024-06-14 13:32:43,452 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 199 selfloop transitions, 38 changer transitions 0/245 dead transitions. [2024-06-14 13:32:43,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 245 transitions, 3040 flow [2024-06-14 13:32:43,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:32:43,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:32:43,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-14 13:32:43,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46462264150943394 [2024-06-14 13:32:43,454 INFO L175 Difference]: Start difference. First operand has 127 places, 192 transitions, 2251 flow. Second operand 8 states and 197 transitions. [2024-06-14 13:32:43,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 245 transitions, 3040 flow [2024-06-14 13:32:44,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 245 transitions, 2995 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-14 13:32:44,004 INFO L231 Difference]: Finished difference. Result has 132 places, 193 transitions, 2338 flow [2024-06-14 13:32:44,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2206, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2338, PETRI_PLACES=132, PETRI_TRANSITIONS=193} [2024-06-14 13:32:44,004 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 76 predicate places. [2024-06-14 13:32:44,004 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 193 transitions, 2338 flow [2024-06-14 13:32:44,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:44,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:44,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:32:44,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 13:32:44,005 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:32:44,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:44,005 INFO L85 PathProgramCache]: Analyzing trace with hash -957137004, now seen corresponding path program 3 times [2024-06-14 13:32:44,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:44,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352622303] [2024-06-14 13:32:44,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:44,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:44,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:50,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:50,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:50,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352622303] [2024-06-14 13:32:50,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352622303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:50,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:50,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:32:50,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976937913] [2024-06-14 13:32:50,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:50,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:32:50,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:50,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:32:50,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:32:50,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:32:50,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 193 transitions, 2338 flow. Second operand has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:50,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:50,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:32:50,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:53,858 INFO L124 PetriNetUnfolderBase]: 10699/15216 cut-off events. [2024-06-14 13:32:53,858 INFO L125 PetriNetUnfolderBase]: For 511776/511776 co-relation queries the response was YES. [2024-06-14 13:32:53,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113237 conditions, 15216 events. 10699/15216 cut-off events. For 511776/511776 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 88982 event pairs, 3573 based on Foata normal form. 112/15325 useless extension candidates. Maximal degree in co-relation 113180. Up to 13767 conditions per place. [2024-06-14 13:32:53,998 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 209 selfloop transitions, 25 changer transitions 0/242 dead transitions. [2024-06-14 13:32:53,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 242 transitions, 3061 flow [2024-06-14 13:32:54,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:32:54,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:32:54,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-14 13:32:54,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528301886792453 [2024-06-14 13:32:54,001 INFO L175 Difference]: Start difference. First operand has 132 places, 193 transitions, 2338 flow. Second operand 8 states and 192 transitions. [2024-06-14 13:32:54,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 242 transitions, 3061 flow [2024-06-14 13:32:54,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 242 transitions, 2963 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 13:32:54,615 INFO L231 Difference]: Finished difference. Result has 134 places, 195 transitions, 2367 flow [2024-06-14 13:32:54,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2240, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2367, PETRI_PLACES=134, PETRI_TRANSITIONS=195} [2024-06-14 13:32:54,616 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 78 predicate places. [2024-06-14 13:32:54,616 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 195 transitions, 2367 flow [2024-06-14 13:32:54,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:54,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:54,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:32:54,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 13:32:54,617 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:32:54,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:54,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1791462778, now seen corresponding path program 4 times [2024-06-14 13:32:54,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:54,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023393978] [2024-06-14 13:32:54,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:54,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:54,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:58,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:58,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:58,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023393978] [2024-06-14 13:32:58,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023393978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:58,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:58,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:32:58,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465483660] [2024-06-14 13:32:58,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:58,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:32:58,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:58,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:32:58,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:32:58,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:32:58,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 195 transitions, 2367 flow. Second operand has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:58,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:58,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:32:58,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:02,965 INFO L124 PetriNetUnfolderBase]: 11510/16422 cut-off events. [2024-06-14 13:33:02,965 INFO L125 PetriNetUnfolderBase]: For 585373/585373 co-relation queries the response was YES. [2024-06-14 13:33:03,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123460 conditions, 16422 events. 11510/16422 cut-off events. For 585373/585373 co-relation queries the response was YES. Maximal size of possible extension queue 710. Compared 98148 event pairs, 3838 based on Foata normal form. 108/16512 useless extension candidates. Maximal degree in co-relation 123402. Up to 14821 conditions per place. [2024-06-14 13:33:03,116 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 196 selfloop transitions, 54 changer transitions 0/258 dead transitions. [2024-06-14 13:33:03,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 258 transitions, 3384 flow [2024-06-14 13:33:03,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:33:03,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:33:03,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-14 13:33:03,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44234800838574423 [2024-06-14 13:33:03,118 INFO L175 Difference]: Start difference. First operand has 134 places, 195 transitions, 2367 flow. Second operand 9 states and 211 transitions. [2024-06-14 13:33:03,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 258 transitions, 3384 flow [2024-06-14 13:33:03,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 258 transitions, 3319 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 13:33:03,902 INFO L231 Difference]: Finished difference. Result has 140 places, 210 transitions, 2728 flow [2024-06-14 13:33:03,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2302, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2728, PETRI_PLACES=140, PETRI_TRANSITIONS=210} [2024-06-14 13:33:03,903 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 84 predicate places. [2024-06-14 13:33:03,903 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 210 transitions, 2728 flow [2024-06-14 13:33:03,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:33:03,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:03,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:33:03,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 13:33:03,903 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:33:03,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:03,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1733178268, now seen corresponding path program 1 times [2024-06-14 13:33:03,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:03,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781097032] [2024-06-14 13:33:03,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:03,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:03,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:07,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:07,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:07,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781097032] [2024-06-14 13:33:07,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781097032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:07,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:07,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:33:07,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732016205] [2024-06-14 13:33:07,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:07,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:33:07,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:07,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:33:07,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:33:08,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:33:08,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 210 transitions, 2728 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:33:08,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:08,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:33:08,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:12,922 INFO L124 PetriNetUnfolderBase]: 12632/17696 cut-off events. [2024-06-14 13:33:12,922 INFO L125 PetriNetUnfolderBase]: For 597066/597066 co-relation queries the response was YES. [2024-06-14 13:33:12,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132293 conditions, 17696 events. 12632/17696 cut-off events. For 597066/597066 co-relation queries the response was YES. Maximal size of possible extension queue 709. Compared 101871 event pairs, 4439 based on Foata normal form. 8/17698 useless extension candidates. Maximal degree in co-relation 132231. Up to 17352 conditions per place. [2024-06-14 13:33:13,094 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 192 selfloop transitions, 62 changer transitions 0/260 dead transitions. [2024-06-14 13:33:13,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 260 transitions, 3616 flow [2024-06-14 13:33:13,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:33:13,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:33:13,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-14 13:33:13,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42318059299191374 [2024-06-14 13:33:13,096 INFO L175 Difference]: Start difference. First operand has 140 places, 210 transitions, 2728 flow. Second operand 7 states and 157 transitions. [2024-06-14 13:33:13,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 260 transitions, 3616 flow [2024-06-14 13:33:14,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 260 transitions, 3301 flow, removed 125 selfloop flow, removed 4 redundant places. [2024-06-14 13:33:14,141 INFO L231 Difference]: Finished difference. Result has 143 places, 229 transitions, 2896 flow [2024-06-14 13:33:14,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2437, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2896, PETRI_PLACES=143, PETRI_TRANSITIONS=229} [2024-06-14 13:33:14,142 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 87 predicate places. [2024-06-14 13:33:14,142 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 229 transitions, 2896 flow [2024-06-14 13:33:14,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:33:14,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:14,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:33:14,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 13:33:14,143 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:33:14,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:14,143 INFO L85 PathProgramCache]: Analyzing trace with hash 896572849, now seen corresponding path program 1 times [2024-06-14 13:33:14,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:14,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357781818] [2024-06-14 13:33:14,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:14,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:14,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:15,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:15,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:15,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357781818] [2024-06-14 13:33:15,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357781818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:15,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:15,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:33:15,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239920356] [2024-06-14 13:33:15,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:15,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:33:15,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:15,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:33:15,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:33:15,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:33:15,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 229 transitions, 2896 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:33:15,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:15,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:33:15,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:21,221 INFO L124 PetriNetUnfolderBase]: 15396/21443 cut-off events. [2024-06-14 13:33:21,222 INFO L125 PetriNetUnfolderBase]: For 659066/659066 co-relation queries the response was YES. [2024-06-14 13:33:21,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153117 conditions, 21443 events. 15396/21443 cut-off events. For 659066/659066 co-relation queries the response was YES. Maximal size of possible extension queue 841. Compared 123951 event pairs, 4970 based on Foata normal form. 2/21443 useless extension candidates. Maximal degree in co-relation 153054. Up to 21321 conditions per place. [2024-06-14 13:33:21,458 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 237 selfloop transitions, 10 changer transitions 0/252 dead transitions. [2024-06-14 13:33:21,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 252 transitions, 3535 flow [2024-06-14 13:33:21,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:33:21,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:33:21,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-06-14 13:33:21,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39622641509433965 [2024-06-14 13:33:21,460 INFO L175 Difference]: Start difference. First operand has 143 places, 229 transitions, 2896 flow. Second operand 5 states and 105 transitions. [2024-06-14 13:33:21,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 252 transitions, 3535 flow [2024-06-14 13:33:22,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 252 transitions, 3340 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-14 13:33:22,578 INFO L231 Difference]: Finished difference. Result has 144 places, 237 transitions, 2851 flow [2024-06-14 13:33:22,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2707, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2851, PETRI_PLACES=144, PETRI_TRANSITIONS=237} [2024-06-14 13:33:22,578 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 88 predicate places. [2024-06-14 13:33:22,578 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 237 transitions, 2851 flow [2024-06-14 13:33:22,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:33:22,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:22,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:33:22,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 13:33:22,579 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:33:22,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:22,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1312220576, now seen corresponding path program 1 times [2024-06-14 13:33:22,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:22,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609823361] [2024-06-14 13:33:22,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:22,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:22,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:27,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:27,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:27,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609823361] [2024-06-14 13:33:27,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609823361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:27,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:27,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:33:27,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713820477] [2024-06-14 13:33:27,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:27,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:33:27,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:27,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:33:27,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:33:27,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:33:27,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 237 transitions, 2851 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:33:27,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:27,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:33:27,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:32,672 INFO L124 PetriNetUnfolderBase]: 14256/20117 cut-off events. [2024-06-14 13:33:32,672 INFO L125 PetriNetUnfolderBase]: For 651959/651959 co-relation queries the response was YES. [2024-06-14 13:33:32,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147048 conditions, 20117 events. 14256/20117 cut-off events. For 651959/651959 co-relation queries the response was YES. Maximal size of possible extension queue 819. Compared 119659 event pairs, 3639 based on Foata normal form. 16/20104 useless extension candidates. Maximal degree in co-relation 146983. Up to 19098 conditions per place.