./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/rfi006_rmo.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/rfi006_rmo.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/rfi006_rmo.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/rfi006_rmo.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 21:21:43,882 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 21:21:43,938 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 21:21:43,941 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 21:21:43,942 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 21:21:43,969 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 21:21:43,969 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 21:21:43,970 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 21:21:43,970 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 21:21:43,973 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 21:21:43,973 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 21:21:43,973 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 21:21:43,974 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 21:21:43,975 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 21:21:43,975 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 21:21:43,975 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 21:21:43,975 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 21:21:43,976 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 21:21:43,976 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 21:21:43,976 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 21:21:43,976 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 21:21:43,976 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 21:21:43,976 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 21:21:43,977 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 21:21:43,977 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 21:21:43,977 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 21:21:43,977 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 21:21:43,977 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 21:21:43,977 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 21:21:43,978 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 21:21:43,978 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 21:21:43,978 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 21:21:43,979 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:21:43,979 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 21:21:43,979 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 21:21:43,979 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 21:21:43,979 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 21:21:43,979 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 21:21:43,979 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 21:21:43,979 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 21:21:43,979 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 21:21:43,980 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 21:21:43,980 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 21:21:43,980 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 21:21:44,138 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 21:21:44,156 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 21:21:44,158 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 21:21:44,159 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 21:21:44,159 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 21:21:44,160 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi006_rmo.i [2024-06-21 21:21:45,228 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 21:21:45,394 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 21:21:45,394 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi006_rmo.i [2024-06-21 21:21:45,411 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53e3a490b/9b530321d2fa47e2877e7e3b19bfc5a9/FLAG293ef99f6 [2024-06-21 21:21:45,466 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53e3a490b/9b530321d2fa47e2877e7e3b19bfc5a9 [2024-06-21 21:21:45,468 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 21:21:45,470 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 21:21:45,472 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/rfi006_rmo.yml/witness.yml [2024-06-21 21:21:45,674 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 21:21:45,676 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 21:21:45,676 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 21:21:45,677 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 21:21:45,680 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 21:21:45,681 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:21:45" (1/2) ... [2024-06-21 21:21:45,681 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@518f1c1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:21:45, skipping insertion in model container [2024-06-21 21:21:45,681 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:21:45" (1/2) ... [2024-06-21 21:21:45,683 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@471fd251 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:21:45, skipping insertion in model container [2024-06-21 21:21:45,683 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:21:45" (2/2) ... [2024-06-21 21:21:45,684 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@518f1c1a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:21:45, skipping insertion in model container [2024-06-21 21:21:45,684 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:21:45" (2/2) ... [2024-06-21 21:21:45,684 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 21:21:45,785 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 21:21:45,786 INFO L97 edCorrectnessWitness]: Location invariant before [L852-L852] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && x$w_buff0 == 0) && x$w_buff0_used == (_Bool)0) && x$w_buff1 == 0) && x$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & x && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1)))) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & x && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || x$read_delayed_var == 0) [2024-06-21 21:21:45,786 INFO L97 edCorrectnessWitness]: Location invariant before [L850-L850] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && x$w_buff0 == 0) && x$w_buff0_used == (_Bool)0) && x$w_buff1 == 0) && x$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & x && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1)))) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & x && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || x$read_delayed_var == 0) [2024-06-21 21:21:45,786 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && x$w_buff0 == 0) && x$w_buff0_used == (_Bool)0) && x$w_buff1 == 0) && x$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & x && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1)))) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & x && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || x$read_delayed_var == 0) [2024-06-21 21:21:45,787 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 21:21:45,787 INFO L106 edCorrectnessWitness]: ghost_update [L848-L848] multithreaded = 1; [2024-06-21 21:21:45,823 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 21:21:46,119 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:21:46,133 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 21:21:46,273 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:21:46,301 INFO L206 MainTranslator]: Completed translation [2024-06-21 21:21:46,302 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:21:46 WrapperNode [2024-06-21 21:21:46,302 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 21:21:46,303 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 21:21:46,304 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 21:21:46,304 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 21:21:46,310 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:21:46" (1/1) ... [2024-06-21 21:21:46,339 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:21:46" (1/1) ... [2024-06-21 21:21:46,385 INFO L138 Inliner]: procedures = 175, calls = 86, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 208 [2024-06-21 21:21:46,395 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 21:21:46,395 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 21:21:46,396 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 21:21:46,396 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 21:21:46,405 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:21:46" (1/1) ... [2024-06-21 21:21:46,405 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:21:46" (1/1) ... [2024-06-21 21:21:46,420 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:21:46" (1/1) ... [2024-06-21 21:21:46,447 INFO L175 MemorySlicer]: Split 45 memory accesses to 2 slices as follows [2, 43]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 7 writes are split as follows [0, 7]. [2024-06-21 21:21:46,448 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:21:46" (1/1) ... [2024-06-21 21:21:46,448 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:21:46" (1/1) ... [2024-06-21 21:21:46,463 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:21:46" (1/1) ... [2024-06-21 21:21:46,472 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:21:46" (1/1) ... [2024-06-21 21:21:46,483 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:21:46" (1/1) ... [2024-06-21 21:21:46,485 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:21:46" (1/1) ... [2024-06-21 21:21:46,489 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 21:21:46,496 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 21:21:46,497 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 21:21:46,497 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 21:21:46,498 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:21:46" (1/1) ... [2024-06-21 21:21:46,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:21:46,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 21:21:46,547 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 21:21:46,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 21:21:46,620 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 21:21:46,621 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 21:21:46,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 21:21:46,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 21:21:46,621 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 21:21:46,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 21:21:46,622 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 21:21:46,622 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 21:21:46,622 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 21:21:46,622 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 21:21:46,622 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 21:21:46,622 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 21:21:46,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 21:21:46,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 21:21:46,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 21:21:46,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 21:21:46,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 21:21:46,625 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 21:21:46,736 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 21:21:46,738 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 21:21:47,170 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 21:21:47,170 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 21:21:47,468 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 21:21:47,468 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 21:21:47,469 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:21:47 BoogieIcfgContainer [2024-06-21 21:21:47,469 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 21:21:47,471 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 21:21:47,471 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 21:21:47,473 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 21:21:47,473 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 09:21:45" (1/4) ... [2024-06-21 21:21:47,474 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f8f6932 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:21:47, skipping insertion in model container [2024-06-21 21:21:47,474 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:21:45" (2/4) ... [2024-06-21 21:21:47,474 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f8f6932 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:21:47, skipping insertion in model container [2024-06-21 21:21:47,474 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:21:46" (3/4) ... [2024-06-21 21:21:47,475 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f8f6932 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:21:47, skipping insertion in model container [2024-06-21 21:21:47,475 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:21:47" (4/4) ... [2024-06-21 21:21:47,476 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi006_rmo.i [2024-06-21 21:21:47,490 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 21:21:47,490 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 21:21:47,490 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 21:21:47,540 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 21:21:47,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 21:21:47,595 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 21:21:47,595 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:21:47,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 21:21:47,598 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 21:21:47,601 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 21:21:47,614 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 21:21:47,620 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;@436ac7ba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 21:21:47,620 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 21:21:47,625 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 21:21:47,625 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 21:21:47,625 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:21:47,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:47,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 21:21:47,626 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:21:47,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:47,632 INFO L85 PathProgramCache]: Analyzing trace with hash 717398002, now seen corresponding path program 1 times [2024-06-21 21:21:47,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:47,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052201535] [2024-06-21 21:21:47,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:47,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:49,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:49,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:49,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052201535] [2024-06-21 21:21:49,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052201535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:49,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:49,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 21:21:49,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299820151] [2024-06-21 21:21:49,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:49,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 21:21:49,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:49,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 21:21:49,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 21:21:49,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:21:49,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:49,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:49,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:21:49,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:49,779 INFO L124 PetriNetUnfolderBase]: 990/1587 cut-off events. [2024-06-21 21:21:49,779 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-21 21:21:49,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3167 conditions, 1587 events. 990/1587 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7695 event pairs, 650 based on Foata normal form. 1/1554 useless extension candidates. Maximal degree in co-relation 3155. Up to 1503 conditions per place. [2024-06-21 21:21:49,793 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 34 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-21 21:21:49,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 181 flow [2024-06-21 21:21:49,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 21:21:49,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 21:21:49,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-21 21:21:49,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-21 21:21:49,803 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 71 transitions. [2024-06-21 21:21:49,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 181 flow [2024-06-21 21:21:49,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 21:21:49,808 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-21 21:21:49,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-21 21:21:49,813 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-21 21:21:49,813 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-21 21:21:49,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:49,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:49,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:49,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 21:21:49,814 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:21:49,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:49,814 INFO L85 PathProgramCache]: Analyzing trace with hash -2069957505, now seen corresponding path program 1 times [2024-06-21 21:21:49,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:49,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879779543] [2024-06-21 21:21:49,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:49,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:49,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:51,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:51,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:51,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879779543] [2024-06-21 21:21:51,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879779543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:51,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:51,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 21:21:51,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136623245] [2024-06-21 21:21:51,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:51,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 21:21:51,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:51,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 21:21:51,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 21:21:51,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:21:51,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:51,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:51,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:21:51,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:52,472 INFO L124 PetriNetUnfolderBase]: 984/1578 cut-off events. [2024-06-21 21:21:52,472 INFO L125 PetriNetUnfolderBase]: For 292/292 co-relation queries the response was YES. [2024-06-21 21:21:52,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3587 conditions, 1578 events. 984/1578 cut-off events. For 292/292 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7686 event pairs, 540 based on Foata normal form. 3/1576 useless extension candidates. Maximal degree in co-relation 3575. Up to 1475 conditions per place. [2024-06-21 21:21:52,503 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 43 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-06-21 21:21:52,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 256 flow [2024-06-21 21:21:52,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 21:21:52,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 21:21:52,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-06-21 21:21:52,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-21 21:21:52,505 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 93 transitions. [2024-06-21 21:21:52,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 256 flow [2024-06-21 21:21:52,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 21:21:52,507 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-21 21:21:52,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-21 21:21:52,507 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-21 21:21:52,508 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-21 21:21:52,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:52,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:52,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:52,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 21:21:52,508 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:21:52,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:52,509 INFO L85 PathProgramCache]: Analyzing trace with hash 255828026, now seen corresponding path program 1 times [2024-06-21 21:21:52,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:52,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922750789] [2024-06-21 21:21:52,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:52,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:52,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:54,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:54,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:54,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922750789] [2024-06-21 21:21:54,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922750789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:54,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:54,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 21:21:54,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094457278] [2024-06-21 21:21:54,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:54,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 21:21:54,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:54,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 21:21:54,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 21:21:54,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:21:54,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:54,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:54,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:21:54,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:55,264 INFO L124 PetriNetUnfolderBase]: 1209/1891 cut-off events. [2024-06-21 21:21:55,265 INFO L125 PetriNetUnfolderBase]: For 982/982 co-relation queries the response was YES. [2024-06-21 21:21:55,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4798 conditions, 1891 events. 1209/1891 cut-off events. For 982/982 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9042 event pairs, 475 based on Foata normal form. 5/1894 useless extension candidates. Maximal degree in co-relation 4784. Up to 1726 conditions per place. [2024-06-21 21:21:55,273 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 16 changer transitions 0/81 dead transitions. [2024-06-21 21:21:55,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 81 transitions, 420 flow [2024-06-21 21:21:55,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:21:55,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:21:55,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-21 21:21:55,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-21 21:21:55,275 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 119 transitions. [2024-06-21 21:21:55,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 81 transitions, 420 flow [2024-06-21 21:21:55,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 81 transitions, 406 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 21:21:55,277 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 237 flow [2024-06-21 21:21:55,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-06-21 21:21:55,278 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-21 21:21:55,278 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 237 flow [2024-06-21 21:21:55,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:55,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:55,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:55,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 21:21:55,279 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:21:55,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:55,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1897701671, now seen corresponding path program 1 times [2024-06-21 21:21:55,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:55,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728283080] [2024-06-21 21:21:55,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:55,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:55,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:57,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:57,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:57,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728283080] [2024-06-21 21:21:57,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728283080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:57,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:57,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:21:57,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693134748] [2024-06-21 21:21:57,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:57,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:21:57,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:57,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:21:57,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:21:57,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:21:57,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:57,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:57,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:21:57,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:58,526 INFO L124 PetriNetUnfolderBase]: 1224/1916 cut-off events. [2024-06-21 21:21:58,527 INFO L125 PetriNetUnfolderBase]: For 2350/2352 co-relation queries the response was YES. [2024-06-21 21:21:58,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5767 conditions, 1916 events. 1224/1916 cut-off events. For 2350/2352 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9244 event pairs, 330 based on Foata normal form. 12/1926 useless extension candidates. Maximal degree in co-relation 5750. Up to 1687 conditions per place. [2024-06-21 21:21:58,536 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 64 selfloop transitions, 19 changer transitions 0/89 dead transitions. [2024-06-21 21:21:58,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 89 transitions, 527 flow [2024-06-21 21:21:58,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:21:58,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:21:58,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-21 21:21:58,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2024-06-21 21:21:58,541 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 237 flow. Second operand 6 states and 136 transitions. [2024-06-21 21:21:58,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 89 transitions, 527 flow [2024-06-21 21:21:58,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 89 transitions, 519 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-21 21:21:58,547 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 293 flow [2024-06-21 21:21:58,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=293, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-06-21 21:21:58,548 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-21 21:21:58,549 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 293 flow [2024-06-21 21:21:58,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:58,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:58,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:58,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 21:21:58,550 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:21:58,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:58,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1140067924, now seen corresponding path program 1 times [2024-06-21 21:21:58,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:58,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198029745] [2024-06-21 21:21:58,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:58,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:58,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:59,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:59,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198029745] [2024-06-21 21:21:59,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198029745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:59,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:59,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:21:59,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322250366] [2024-06-21 21:21:59,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:59,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:21:59,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:59,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:21:59,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:21:59,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:21:59,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 293 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:59,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:59,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:21:59,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:00,596 INFO L124 PetriNetUnfolderBase]: 1219/1906 cut-off events. [2024-06-21 21:22:00,596 INFO L125 PetriNetUnfolderBase]: For 3470/3470 co-relation queries the response was YES. [2024-06-21 21:22:00,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6271 conditions, 1906 events. 1219/1906 cut-off events. For 3470/3470 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9116 event pairs, 468 based on Foata normal form. 2/1905 useless extension candidates. Maximal degree in co-relation 6250. Up to 1831 conditions per place. [2024-06-21 21:22:00,605 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 53 selfloop transitions, 8 changer transitions 0/66 dead transitions. [2024-06-21 21:22:00,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 66 transitions, 449 flow [2024-06-21 21:22:00,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:22:00,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:22:00,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-21 21:22:00,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-21 21:22:00,608 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 293 flow. Second operand 5 states and 89 transitions. [2024-06-21 21:22:00,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 66 transitions, 449 flow [2024-06-21 21:22:00,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 66 transitions, 399 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 21:22:00,617 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 267 flow [2024-06-21 21:22:00,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-06-21 21:22:00,619 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-21 21:22:00,619 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 267 flow [2024-06-21 21:22:00,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:00,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:00,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:00,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 21:22:00,620 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:22:00,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:00,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1004535879, now seen corresponding path program 1 times [2024-06-21 21:22:00,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:00,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305608973] [2024-06-21 21:22:00,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:00,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:00,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:02,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:02,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:02,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305608973] [2024-06-21 21:22:02,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305608973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:02,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:02,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:22:02,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507298829] [2024-06-21 21:22:02,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:02,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:22:02,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:02,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:22:02,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:22:02,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:22:02,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 267 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:02,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:02,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:22:02,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:03,112 INFO L124 PetriNetUnfolderBase]: 1209/1894 cut-off events. [2024-06-21 21:22:03,113 INFO L125 PetriNetUnfolderBase]: For 4025/4025 co-relation queries the response was YES. [2024-06-21 21:22:03,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6208 conditions, 1894 events. 1209/1894 cut-off events. For 4025/4025 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9041 event pairs, 438 based on Foata normal form. 4/1898 useless extension candidates. Maximal degree in co-relation 6185. Up to 1795 conditions per place. [2024-06-21 21:22:03,122 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 59 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2024-06-21 21:22:03,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 75 transitions, 473 flow [2024-06-21 21:22:03,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:22:03,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:22:03,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-21 21:22:03,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 21:22:03,124 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 267 flow. Second operand 6 states and 106 transitions. [2024-06-21 21:22:03,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 75 transitions, 473 flow [2024-06-21 21:22:03,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 75 transitions, 451 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 21:22:03,128 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 299 flow [2024-06-21 21:22:03,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=299, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2024-06-21 21:22:03,129 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-21 21:22:03,129 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 299 flow [2024-06-21 21:22:03,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:03,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:03,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:03,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 21:22:03,129 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:22:03,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:03,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1081561335, now seen corresponding path program 1 times [2024-06-21 21:22:03,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:03,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005799780] [2024-06-21 21:22:03,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:03,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:03,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:05,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:05,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:05,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005799780] [2024-06-21 21:22:05,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005799780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:05,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:05,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:22:05,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567850576] [2024-06-21 21:22:05,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:05,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:22:05,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:05,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:22:05,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:22:05,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:22:05,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 299 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:05,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:05,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:22:05,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:06,503 INFO L124 PetriNetUnfolderBase]: 1217/1905 cut-off events. [2024-06-21 21:22:06,503 INFO L125 PetriNetUnfolderBase]: For 5203/5207 co-relation queries the response was YES. [2024-06-21 21:22:06,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6693 conditions, 1905 events. 1217/1905 cut-off events. For 5203/5207 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9120 event pairs, 449 based on Foata normal form. 8/1913 useless extension candidates. Maximal degree in co-relation 6670. Up to 1737 conditions per place. [2024-06-21 21:22:06,512 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 19 changer transitions 0/83 dead transitions. [2024-06-21 21:22:06,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 83 transitions, 561 flow [2024-06-21 21:22:06,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:22:06,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:22:06,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-21 21:22:06,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-21 21:22:06,514 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 299 flow. Second operand 6 states and 115 transitions. [2024-06-21 21:22:06,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 83 transitions, 561 flow [2024-06-21 21:22:06,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 83 transitions, 531 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 21:22:06,518 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 341 flow [2024-06-21 21:22:06,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=341, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2024-06-21 21:22:06,518 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-21 21:22:06,518 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 341 flow [2024-06-21 21:22:06,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:06,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:06,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:06,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 21:22:06,519 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:22:06,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:06,519 INFO L85 PathProgramCache]: Analyzing trace with hash -388569045, now seen corresponding path program 2 times [2024-06-21 21:22:06,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:06,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933406904] [2024-06-21 21:22:06,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:06,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:06,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:08,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:08,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:08,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933406904] [2024-06-21 21:22:08,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933406904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:08,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:08,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:22:08,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970840909] [2024-06-21 21:22:08,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:08,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:22:08,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:08,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:22:08,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:22:08,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:22:08,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 341 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:08,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:08,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:22:08,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:09,480 INFO L124 PetriNetUnfolderBase]: 1205/1875 cut-off events. [2024-06-21 21:22:09,481 INFO L125 PetriNetUnfolderBase]: For 6242/6242 co-relation queries the response was YES. [2024-06-21 21:22:09,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6808 conditions, 1875 events. 1205/1875 cut-off events. For 6242/6242 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8885 event pairs, 467 based on Foata normal form. 2/1876 useless extension candidates. Maximal degree in co-relation 6784. Up to 1721 conditions per place. [2024-06-21 21:22:09,493 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 52 selfloop transitions, 20 changer transitions 0/77 dead transitions. [2024-06-21 21:22:09,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 77 transitions, 531 flow [2024-06-21 21:22:09,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:22:09,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:22:09,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-21 21:22:09,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 21:22:09,494 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 341 flow. Second operand 6 states and 110 transitions. [2024-06-21 21:22:09,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 77 transitions, 531 flow [2024-06-21 21:22:09,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 77 transitions, 502 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 21:22:09,499 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 360 flow [2024-06-21 21:22:09,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=360, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2024-06-21 21:22:09,500 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-21 21:22:09,500 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 360 flow [2024-06-21 21:22:09,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:09,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:09,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:09,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 21:22:09,500 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:22:09,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:09,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1263208520, now seen corresponding path program 1 times [2024-06-21 21:22:09,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:09,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056657469] [2024-06-21 21:22:09,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:09,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:09,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:11,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:11,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056657469] [2024-06-21 21:22:11,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056657469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:11,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:11,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:22:11,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198338662] [2024-06-21 21:22:11,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:11,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:22:11,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:11,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:22:11,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:22:11,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:22:11,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 360 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:11,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:11,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:22:11,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:12,542 INFO L124 PetriNetUnfolderBase]: 1413/2216 cut-off events. [2024-06-21 21:22:12,542 INFO L125 PetriNetUnfolderBase]: For 8844/8844 co-relation queries the response was YES. [2024-06-21 21:22:12,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8341 conditions, 2216 events. 1413/2216 cut-off events. For 8844/8844 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10853 event pairs, 392 based on Foata normal form. 8/2223 useless extension candidates. Maximal degree in co-relation 8316. Up to 1716 conditions per place. [2024-06-21 21:22:12,552 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 87 selfloop transitions, 39 changer transitions 0/131 dead transitions. [2024-06-21 21:22:12,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 131 transitions, 1029 flow [2024-06-21 21:22:12,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:22:12,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:22:12,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-21 21:22:12,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-21 21:22:12,556 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 360 flow. Second operand 8 states and 161 transitions. [2024-06-21 21:22:12,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 131 transitions, 1029 flow [2024-06-21 21:22:12,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 131 transitions, 903 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 21:22:12,564 INFO L231 Difference]: Finished difference. Result has 69 places, 82 transitions, 581 flow [2024-06-21 21:22:12,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=581, PETRI_PLACES=69, PETRI_TRANSITIONS=82} [2024-06-21 21:22:12,566 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-21 21:22:12,566 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 82 transitions, 581 flow [2024-06-21 21:22:12,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:12,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:12,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:12,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 21:22:12,567 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:22:12,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:12,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1543357714, now seen corresponding path program 2 times [2024-06-21 21:22:12,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:12,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484638331] [2024-06-21 21:22:12,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:12,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:12,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:15,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:15,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:15,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484638331] [2024-06-21 21:22:15,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484638331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:15,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:15,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:22:15,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923454350] [2024-06-21 21:22:15,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:15,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:22:15,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:15,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:22:15,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:22:15,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:22:15,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 82 transitions, 581 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:15,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:15,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:22:15,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:16,417 INFO L124 PetriNetUnfolderBase]: 1501/2372 cut-off events. [2024-06-21 21:22:16,417 INFO L125 PetriNetUnfolderBase]: For 11704/11710 co-relation queries the response was YES. [2024-06-21 21:22:16,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9771 conditions, 2372 events. 1501/2372 cut-off events. For 11704/11710 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 11911 event pairs, 409 based on Foata normal form. 16/2387 useless extension candidates. Maximal degree in co-relation 9742. Up to 1772 conditions per place. [2024-06-21 21:22:16,431 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 71 selfloop transitions, 48 changer transitions 0/124 dead transitions. [2024-06-21 21:22:16,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 124 transitions, 1027 flow [2024-06-21 21:22:16,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:22:16,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:22:16,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 21:22:16,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-21 21:22:16,434 INFO L175 Difference]: Start difference. First operand has 69 places, 82 transitions, 581 flow. Second operand 7 states and 137 transitions. [2024-06-21 21:22:16,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 124 transitions, 1027 flow [2024-06-21 21:22:16,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 124 transitions, 999 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-21 21:22:16,447 INFO L231 Difference]: Finished difference. Result has 74 places, 89 transitions, 734 flow [2024-06-21 21:22:16,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=734, PETRI_PLACES=74, PETRI_TRANSITIONS=89} [2024-06-21 21:22:16,449 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-06-21 21:22:16,450 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 89 transitions, 734 flow [2024-06-21 21:22:16,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:16,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:16,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:16,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 21:22:16,450 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:22:16,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:16,451 INFO L85 PathProgramCache]: Analyzing trace with hash 839263160, now seen corresponding path program 3 times [2024-06-21 21:22:16,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:16,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072245000] [2024-06-21 21:22:16,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:16,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:16,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:18,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:18,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:18,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072245000] [2024-06-21 21:22:18,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072245000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:18,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:18,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:22:18,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762954438] [2024-06-21 21:22:18,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:18,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:22:18,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:18,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:22:18,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:22:18,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:22:18,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 89 transitions, 734 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:18,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:18,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:22:18,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:19,856 INFO L124 PetriNetUnfolderBase]: 1545/2425 cut-off events. [2024-06-21 21:22:19,857 INFO L125 PetriNetUnfolderBase]: For 14504/14508 co-relation queries the response was YES. [2024-06-21 21:22:19,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10791 conditions, 2425 events. 1545/2425 cut-off events. For 14504/14508 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 12028 event pairs, 425 based on Foata normal form. 8/2432 useless extension candidates. Maximal degree in co-relation 10760. Up to 1790 conditions per place. [2024-06-21 21:22:19,870 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 69 selfloop transitions, 58 changer transitions 0/132 dead transitions. [2024-06-21 21:22:19,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 132 transitions, 1286 flow [2024-06-21 21:22:19,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:22:19,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:22:19,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 21:22:19,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-21 21:22:19,871 INFO L175 Difference]: Start difference. First operand has 74 places, 89 transitions, 734 flow. Second operand 7 states and 137 transitions. [2024-06-21 21:22:19,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 132 transitions, 1286 flow [2024-06-21 21:22:19,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 132 transitions, 1170 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-21 21:22:19,886 INFO L231 Difference]: Finished difference. Result has 77 places, 99 transitions, 878 flow [2024-06-21 21:22:19,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=878, PETRI_PLACES=77, PETRI_TRANSITIONS=99} [2024-06-21 21:22:19,887 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 34 predicate places. [2024-06-21 21:22:19,887 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 99 transitions, 878 flow [2024-06-21 21:22:19,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:19,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:19,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:19,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 21:22:19,887 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:22:19,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:19,888 INFO L85 PathProgramCache]: Analyzing trace with hash 146859560, now seen corresponding path program 4 times [2024-06-21 21:22:19,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:19,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480068707] [2024-06-21 21:22:19,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:19,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:19,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:22,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:22,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:22,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480068707] [2024-06-21 21:22:22,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480068707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:22,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:22,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:22:22,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711199081] [2024-06-21 21:22:22,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:22,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:22:22,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:22,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:22:22,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:22:22,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:22:22,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 99 transitions, 878 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:22,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:22,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:22:22,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:23,168 INFO L124 PetriNetUnfolderBase]: 1529/2406 cut-off events. [2024-06-21 21:22:23,168 INFO L125 PetriNetUnfolderBase]: For 14705/14715 co-relation queries the response was YES. [2024-06-21 21:22:23,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10593 conditions, 2406 events. 1529/2406 cut-off events. For 14705/14715 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12017 event pairs, 409 based on Foata normal form. 14/2419 useless extension candidates. Maximal degree in co-relation 10561. Up to 1783 conditions per place. [2024-06-21 21:22:23,190 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 65 selfloop transitions, 60 changer transitions 0/130 dead transitions. [2024-06-21 21:22:23,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 130 transitions, 1260 flow [2024-06-21 21:22:23,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:22:23,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:22:23,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-21 21:22:23,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-06-21 21:22:23,193 INFO L175 Difference]: Start difference. First operand has 77 places, 99 transitions, 878 flow. Second operand 7 states and 134 transitions. [2024-06-21 21:22:23,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 130 transitions, 1260 flow [2024-06-21 21:22:23,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 130 transitions, 1173 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-21 21:22:23,207 INFO L231 Difference]: Finished difference. Result has 82 places, 99 transitions, 921 flow [2024-06-21 21:22:23,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=791, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=921, PETRI_PLACES=82, PETRI_TRANSITIONS=99} [2024-06-21 21:22:23,208 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-21 21:22:23,208 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 99 transitions, 921 flow [2024-06-21 21:22:23,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:23,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:23,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:23,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 21:22:23,209 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:22:23,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:23,209 INFO L85 PathProgramCache]: Analyzing trace with hash 613488337, now seen corresponding path program 1 times [2024-06-21 21:22:23,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:23,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638719195] [2024-06-21 21:22:23,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:23,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:23,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:26,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:26,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:26,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638719195] [2024-06-21 21:22:26,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638719195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:26,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:26,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:22:26,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083549087] [2024-06-21 21:22:26,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:26,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:22:26,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:26,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:22:26,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:22:26,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:22:26,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 99 transitions, 921 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:26,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:26,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:22:26,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:27,519 INFO L124 PetriNetUnfolderBase]: 1678/2665 cut-off events. [2024-06-21 21:22:27,519 INFO L125 PetriNetUnfolderBase]: For 18357/18380 co-relation queries the response was YES. [2024-06-21 21:22:27,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12291 conditions, 2665 events. 1678/2665 cut-off events. For 18357/18380 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13706 event pairs, 459 based on Foata normal form. 15/2679 useless extension candidates. Maximal degree in co-relation 12256. Up to 1888 conditions per place. [2024-06-21 21:22:27,553 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 83 selfloop transitions, 76 changer transitions 0/164 dead transitions. [2024-06-21 21:22:27,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 164 transitions, 1776 flow [2024-06-21 21:22:27,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:22:27,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:22:27,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 21:22:27,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-21 21:22:27,556 INFO L175 Difference]: Start difference. First operand has 82 places, 99 transitions, 921 flow. Second operand 9 states and 167 transitions. [2024-06-21 21:22:27,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 164 transitions, 1776 flow [2024-06-21 21:22:27,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 164 transitions, 1569 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 21:22:27,573 INFO L231 Difference]: Finished difference. Result has 89 places, 124 transitions, 1304 flow [2024-06-21 21:22:27,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1304, PETRI_PLACES=89, PETRI_TRANSITIONS=124} [2024-06-21 21:22:27,574 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-21 21:22:27,574 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 124 transitions, 1304 flow [2024-06-21 21:22:27,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:27,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:27,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:27,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 21:22:27,575 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:22:27,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:27,575 INFO L85 PathProgramCache]: Analyzing trace with hash 182515815, now seen corresponding path program 2 times [2024-06-21 21:22:27,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:27,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080685100] [2024-06-21 21:22:27,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:27,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:27,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:29,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:29,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:29,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080685100] [2024-06-21 21:22:29,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080685100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:29,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:29,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:22:29,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354331522] [2024-06-21 21:22:29,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:29,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:22:29,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:29,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:22:29,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:22:29,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:22:29,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 124 transitions, 1304 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:29,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:29,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:22:29,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:30,606 INFO L124 PetriNetUnfolderBase]: 1854/2978 cut-off events. [2024-06-21 21:22:30,607 INFO L125 PetriNetUnfolderBase]: For 23628/23640 co-relation queries the response was YES. [2024-06-21 21:22:30,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14484 conditions, 2978 events. 1854/2978 cut-off events. For 23628/23640 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15920 event pairs, 449 based on Foata normal form. 18/2996 useless extension candidates. Maximal degree in co-relation 14444. Up to 2172 conditions per place. [2024-06-21 21:22:30,621 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 126 selfloop transitions, 92 changer transitions 0/223 dead transitions. [2024-06-21 21:22:30,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 223 transitions, 2670 flow [2024-06-21 21:22:30,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:22:30,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:22:30,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-21 21:22:30,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-21 21:22:30,623 INFO L175 Difference]: Start difference. First operand has 89 places, 124 transitions, 1304 flow. Second operand 8 states and 163 transitions. [2024-06-21 21:22:30,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 223 transitions, 2670 flow [2024-06-21 21:22:30,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 223 transitions, 2452 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-21 21:22:30,647 INFO L231 Difference]: Finished difference. Result has 97 places, 175 transitions, 2110 flow [2024-06-21 21:22:30,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1176, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2110, PETRI_PLACES=97, PETRI_TRANSITIONS=175} [2024-06-21 21:22:30,647 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-21 21:22:30,647 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 175 transitions, 2110 flow [2024-06-21 21:22:30,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:30,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:30,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:30,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 21:22:30,648 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:22:30,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:30,648 INFO L85 PathProgramCache]: Analyzing trace with hash -992969249, now seen corresponding path program 3 times [2024-06-21 21:22:30,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:30,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684727135] [2024-06-21 21:22:30,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:30,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:30,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:32,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:32,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:32,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684727135] [2024-06-21 21:22:32,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684727135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:32,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:32,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:22:32,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368119610] [2024-06-21 21:22:32,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:32,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:22:32,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:32,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:22:32,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:22:32,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:22:32,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 175 transitions, 2110 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:32,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:32,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:22:32,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:34,322 INFO L124 PetriNetUnfolderBase]: 1858/2988 cut-off events. [2024-06-21 21:22:34,323 INFO L125 PetriNetUnfolderBase]: For 27569/27573 co-relation queries the response was YES. [2024-06-21 21:22:34,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15557 conditions, 2988 events. 1858/2988 cut-off events. For 27569/27573 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 16040 event pairs, 414 based on Foata normal form. 6/2994 useless extension candidates. Maximal degree in co-relation 15511. Up to 2328 conditions per place. [2024-06-21 21:22:34,369 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 164 selfloop transitions, 84 changer transitions 0/253 dead transitions. [2024-06-21 21:22:34,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 253 transitions, 3295 flow [2024-06-21 21:22:34,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:22:34,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:22:34,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 21:22:34,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-21 21:22:34,372 INFO L175 Difference]: Start difference. First operand has 97 places, 175 transitions, 2110 flow. Second operand 9 states and 172 transitions. [2024-06-21 21:22:34,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 253 transitions, 3295 flow [2024-06-21 21:22:34,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 253 transitions, 3127 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-21 21:22:34,408 INFO L231 Difference]: Finished difference. Result has 106 places, 204 transitions, 2642 flow [2024-06-21 21:22:34,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1990, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2642, PETRI_PLACES=106, PETRI_TRANSITIONS=204} [2024-06-21 21:22:34,409 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-06-21 21:22:34,409 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 204 transitions, 2642 flow [2024-06-21 21:22:34,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:34,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:34,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:34,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 21:22:34,410 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:22:34,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:34,411 INFO L85 PathProgramCache]: Analyzing trace with hash 998498309, now seen corresponding path program 4 times [2024-06-21 21:22:34,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:34,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383950980] [2024-06-21 21:22:34,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:34,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:36,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:36,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:36,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383950980] [2024-06-21 21:22:36,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383950980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:36,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:36,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:22:36,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961476834] [2024-06-21 21:22:36,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:36,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:22:36,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:36,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:22:36,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:22:36,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:22:36,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 204 transitions, 2642 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:36,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:36,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:22:36,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:38,217 INFO L124 PetriNetUnfolderBase]: 1911/3099 cut-off events. [2024-06-21 21:22:38,218 INFO L125 PetriNetUnfolderBase]: For 31152/31170 co-relation queries the response was YES. [2024-06-21 21:22:38,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17061 conditions, 3099 events. 1911/3099 cut-off events. For 31152/31170 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 17029 event pairs, 520 based on Foata normal form. 25/3123 useless extension candidates. Maximal degree in co-relation 17010. Up to 2087 conditions per place. [2024-06-21 21:22:38,239 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 86 selfloop transitions, 166 changer transitions 0/257 dead transitions. [2024-06-21 21:22:38,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 257 transitions, 3605 flow [2024-06-21 21:22:38,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:22:38,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:22:38,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-21 21:22:38,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-21 21:22:38,241 INFO L175 Difference]: Start difference. First operand has 106 places, 204 transitions, 2642 flow. Second operand 7 states and 142 transitions. [2024-06-21 21:22:38,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 257 transitions, 3605 flow [2024-06-21 21:22:38,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 257 transitions, 3519 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 21:22:38,283 INFO L231 Difference]: Finished difference. Result has 109 places, 217 transitions, 3158 flow [2024-06-21 21:22:38,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2571, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3158, PETRI_PLACES=109, PETRI_TRANSITIONS=217} [2024-06-21 21:22:38,285 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-21 21:22:38,285 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 217 transitions, 3158 flow [2024-06-21 21:22:38,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:38,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:38,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:38,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 21:22:38,286 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:22:38,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:38,287 INFO L85 PathProgramCache]: Analyzing trace with hash 746057005, now seen corresponding path program 5 times [2024-06-21 21:22:38,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:38,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31967618] [2024-06-21 21:22:38,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:38,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:38,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:41,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:41,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:41,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31967618] [2024-06-21 21:22:41,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31967618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:41,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:41,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:22:41,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844100699] [2024-06-21 21:22:41,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:41,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:22:41,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:41,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:22:41,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:22:41,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:22:41,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 217 transitions, 3158 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:41,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:41,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:22:41,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:42,466 INFO L124 PetriNetUnfolderBase]: 1982/3181 cut-off events. [2024-06-21 21:22:42,467 INFO L125 PetriNetUnfolderBase]: For 38345/38355 co-relation queries the response was YES. [2024-06-21 21:22:42,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18705 conditions, 3181 events. 1982/3181 cut-off events. For 38345/38355 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 17230 event pairs, 499 based on Foata normal form. 13/3194 useless extension candidates. Maximal degree in co-relation 18652. Up to 2151 conditions per place. [2024-06-21 21:22:42,488 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 90 selfloop transitions, 183 changer transitions 0/278 dead transitions. [2024-06-21 21:22:42,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 278 transitions, 4316 flow [2024-06-21 21:22:42,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:22:42,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:22:42,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 21:22:42,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 21:22:42,491 INFO L175 Difference]: Start difference. First operand has 109 places, 217 transitions, 3158 flow. Second operand 8 states and 152 transitions. [2024-06-21 21:22:42,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 278 transitions, 4316 flow [2024-06-21 21:22:42,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 278 transitions, 3860 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-21 21:22:42,529 INFO L231 Difference]: Finished difference. Result has 111 places, 235 transitions, 3454 flow [2024-06-21 21:22:42,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2742, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3454, PETRI_PLACES=111, PETRI_TRANSITIONS=235} [2024-06-21 21:22:42,529 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2024-06-21 21:22:42,529 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 235 transitions, 3454 flow [2024-06-21 21:22:42,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:42,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:42,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:42,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 21:22:42,530 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:22:42,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:42,530 INFO L85 PathProgramCache]: Analyzing trace with hash 991707205, now seen corresponding path program 6 times [2024-06-21 21:22:42,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:42,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443138089] [2024-06-21 21:22:42,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:42,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:42,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:45,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:45,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:45,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443138089] [2024-06-21 21:22:45,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443138089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:45,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:45,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:22:45,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736601326] [2024-06-21 21:22:45,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:45,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:22:45,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:45,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:22:45,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:22:45,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:22:45,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 235 transitions, 3454 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:45,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:45,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:22:45,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:46,702 INFO L124 PetriNetUnfolderBase]: 1957/3169 cut-off events. [2024-06-21 21:22:46,702 INFO L125 PetriNetUnfolderBase]: For 35360/35374 co-relation queries the response was YES. [2024-06-21 21:22:46,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18272 conditions, 3169 events. 1957/3169 cut-off events. For 35360/35374 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 17344 event pairs, 448 based on Foata normal form. 17/3185 useless extension candidates. Maximal degree in co-relation 18220. Up to 2130 conditions per place. [2024-06-21 21:22:46,723 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 94 selfloop transitions, 186 changer transitions 0/285 dead transitions. [2024-06-21 21:22:46,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 285 transitions, 4298 flow [2024-06-21 21:22:46,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:22:46,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:22:46,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 21:22:46,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 21:22:46,725 INFO L175 Difference]: Start difference. First operand has 111 places, 235 transitions, 3454 flow. Second operand 9 states and 168 transitions. [2024-06-21 21:22:46,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 285 transitions, 4298 flow [2024-06-21 21:22:46,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 285 transitions, 3915 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-06-21 21:22:46,763 INFO L231 Difference]: Finished difference. Result has 115 places, 235 transitions, 3467 flow [2024-06-21 21:22:46,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3071, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3467, PETRI_PLACES=115, PETRI_TRANSITIONS=235} [2024-06-21 21:22:46,763 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 72 predicate places. [2024-06-21 21:22:46,763 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 235 transitions, 3467 flow [2024-06-21 21:22:46,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:46,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:46,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:46,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 21:22:46,764 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:22:46,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:46,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1205434376, now seen corresponding path program 1 times [2024-06-21 21:22:46,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:46,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321384489] [2024-06-21 21:22:46,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:46,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:46,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:49,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:49,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:49,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321384489] [2024-06-21 21:22:49,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321384489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:49,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:49,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:22:49,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120676458] [2024-06-21 21:22:49,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:49,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:22:49,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:49,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:22:49,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:22:49,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:22:49,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 235 transitions, 3467 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:49,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:49,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:22:49,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:50,475 INFO L124 PetriNetUnfolderBase]: 1949/3183 cut-off events. [2024-06-21 21:22:50,475 INFO L125 PetriNetUnfolderBase]: For 39644/39646 co-relation queries the response was YES. [2024-06-21 21:22:50,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18388 conditions, 3183 events. 1949/3183 cut-off events. For 39644/39646 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 17674 event pairs, 741 based on Foata normal form. 4/3187 useless extension candidates. Maximal degree in co-relation 18334. Up to 2849 conditions per place. [2024-06-21 21:22:50,497 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 244 selfloop transitions, 17 changer transitions 0/266 dead transitions. [2024-06-21 21:22:50,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 266 transitions, 4091 flow [2024-06-21 21:22:50,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:22:50,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:22:50,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 21:22:50,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 21:22:50,500 INFO L175 Difference]: Start difference. First operand has 115 places, 235 transitions, 3467 flow. Second operand 8 states and 137 transitions. [2024-06-21 21:22:50,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 266 transitions, 4091 flow [2024-06-21 21:22:50,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 266 transitions, 3647 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-21 21:22:50,543 INFO L231 Difference]: Finished difference. Result has 116 places, 237 transitions, 3090 flow [2024-06-21 21:22:50,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3023, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3090, PETRI_PLACES=116, PETRI_TRANSITIONS=237} [2024-06-21 21:22:50,544 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-21 21:22:50,545 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 237 transitions, 3090 flow [2024-06-21 21:22:50,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:50,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:50,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:50,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 21:22:50,545 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:22:50,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:50,546 INFO L85 PathProgramCache]: Analyzing trace with hash 906195085, now seen corresponding path program 1 times [2024-06-21 21:22:50,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:50,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241837558] [2024-06-21 21:22:50,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:50,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:50,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:51,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:51,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:51,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241837558] [2024-06-21 21:22:51,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241837558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:51,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:51,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:22:51,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934279867] [2024-06-21 21:22:51,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:51,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:22:51,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:51,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:22:51,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:22:51,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:22:51,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 237 transitions, 3090 flow. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:51,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:51,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:22:51,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:52,680 INFO L124 PetriNetUnfolderBase]: 1847/3002 cut-off events. [2024-06-21 21:22:52,680 INFO L125 PetriNetUnfolderBase]: For 39567/39642 co-relation queries the response was YES. [2024-06-21 21:22:52,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17308 conditions, 3002 events. 1847/3002 cut-off events. For 39567/39642 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 16745 event pairs, 683 based on Foata normal form. 35/3004 useless extension candidates. Maximal degree in co-relation 17253. Up to 2693 conditions per place. [2024-06-21 21:22:52,699 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 227 selfloop transitions, 9 changer transitions 0/250 dead transitions. [2024-06-21 21:22:52,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 250 transitions, 3610 flow [2024-06-21 21:22:52,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:22:52,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:22:52,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-21 21:22:52,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-21 21:22:52,700 INFO L175 Difference]: Start difference. First operand has 116 places, 237 transitions, 3090 flow. Second operand 5 states and 89 transitions. [2024-06-21 21:22:52,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 250 transitions, 3610 flow [2024-06-21 21:22:52,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 250 transitions, 3550 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 21:22:52,742 INFO L231 Difference]: Finished difference. Result has 115 places, 240 transitions, 3082 flow [2024-06-21 21:22:52,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3030, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3082, PETRI_PLACES=115, PETRI_TRANSITIONS=240} [2024-06-21 21:22:52,742 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 72 predicate places. [2024-06-21 21:22:52,742 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 240 transitions, 3082 flow [2024-06-21 21:22:52,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:52,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:52,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:52,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 21:22:52,743 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:22:52,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:52,743 INFO L85 PathProgramCache]: Analyzing trace with hash -338722981, now seen corresponding path program 1 times [2024-06-21 21:22:52,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:52,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23250507] [2024-06-21 21:22:52,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:52,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:52,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:54,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:54,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:54,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23250507] [2024-06-21 21:22:54,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23250507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:54,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:54,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:22:54,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506364338] [2024-06-21 21:22:54,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:54,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:22:54,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:54,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:22:54,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:22:54,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:22:54,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 240 transitions, 3082 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:54,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:54,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:22:54,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:55,316 INFO L124 PetriNetUnfolderBase]: 2033/3294 cut-off events. [2024-06-21 21:22:55,316 INFO L125 PetriNetUnfolderBase]: For 38807/38819 co-relation queries the response was YES. [2024-06-21 21:22:55,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18466 conditions, 3294 events. 2033/3294 cut-off events. For 38807/38819 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 18349 event pairs, 439 based on Foata normal form. 16/3310 useless extension candidates. Maximal degree in co-relation 18411. Up to 2677 conditions per place. [2024-06-21 21:22:55,338 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 234 selfloop transitions, 50 changer transitions 0/289 dead transitions. [2024-06-21 21:22:55,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 289 transitions, 3917 flow [2024-06-21 21:22:55,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:22:55,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:22:55,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 21:22:55,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-21 21:22:55,340 INFO L175 Difference]: Start difference. First operand has 115 places, 240 transitions, 3082 flow. Second operand 8 states and 153 transitions. [2024-06-21 21:22:55,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 289 transitions, 3917 flow [2024-06-21 21:22:55,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 289 transitions, 3876 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 21:22:55,397 INFO L231 Difference]: Finished difference. Result has 121 places, 251 transitions, 3282 flow [2024-06-21 21:22:55,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3041, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3282, PETRI_PLACES=121, PETRI_TRANSITIONS=251} [2024-06-21 21:22:55,397 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 78 predicate places. [2024-06-21 21:22:55,398 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 251 transitions, 3282 flow [2024-06-21 21:22:55,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:55,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:55,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:55,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 21:22:55,398 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:22:55,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:55,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1282200557, now seen corresponding path program 2 times [2024-06-21 21:22:55,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:55,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914647775] [2024-06-21 21:22:55,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:55,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:55,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:57,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:57,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:57,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914647775] [2024-06-21 21:22:57,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914647775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:57,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:57,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:22:57,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691067815] [2024-06-21 21:22:57,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:57,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:22:57,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:57,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:22:57,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:22:57,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:22:57,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 251 transitions, 3282 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:57,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:57,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:22:57,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:59,071 INFO L124 PetriNetUnfolderBase]: 2044/3306 cut-off events. [2024-06-21 21:22:59,071 INFO L125 PetriNetUnfolderBase]: For 42552/42556 co-relation queries the response was YES. [2024-06-21 21:22:59,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19095 conditions, 3306 events. 2044/3306 cut-off events. For 42552/42556 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 18334 event pairs, 438 based on Foata normal form. 8/3314 useless extension candidates. Maximal degree in co-relation 19038. Up to 2808 conditions per place. [2024-06-21 21:22:59,093 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 228 selfloop transitions, 53 changer transitions 0/286 dead transitions. [2024-06-21 21:22:59,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 286 transitions, 3962 flow [2024-06-21 21:22:59,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:22:59,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:22:59,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 21:22:59,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-21 21:22:59,096 INFO L175 Difference]: Start difference. First operand has 121 places, 251 transitions, 3282 flow. Second operand 8 states and 149 transitions. [2024-06-21 21:22:59,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 286 transitions, 3962 flow [2024-06-21 21:22:59,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 286 transitions, 3921 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-21 21:22:59,151 INFO L231 Difference]: Finished difference. Result has 127 places, 253 transitions, 3387 flow [2024-06-21 21:22:59,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3247, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3387, PETRI_PLACES=127, PETRI_TRANSITIONS=253} [2024-06-21 21:22:59,151 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-21 21:22:59,151 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 253 transitions, 3387 flow [2024-06-21 21:22:59,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:22:59,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:22:59,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:59,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 21:22:59,152 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:22:59,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:22:59,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1311236435, now seen corresponding path program 3 times [2024-06-21 21:22:59,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:22:59,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137597115] [2024-06-21 21:22:59,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:22:59,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:22:59,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:00,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:00,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:00,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137597115] [2024-06-21 21:23:00,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137597115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:00,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:00,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:23:00,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338111466] [2024-06-21 21:23:00,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:00,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:23:00,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:00,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:23:00,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:23:00,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:23:00,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 253 transitions, 3387 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:00,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:00,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:23:00,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:01,590 INFO L124 PetriNetUnfolderBase]: 2189/3552 cut-off events. [2024-06-21 21:23:01,590 INFO L125 PetriNetUnfolderBase]: For 48464/48476 co-relation queries the response was YES. [2024-06-21 21:23:01,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20416 conditions, 3552 events. 2189/3552 cut-off events. For 48464/48476 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 20180 event pairs, 332 based on Foata normal form. 14/3566 useless extension candidates. Maximal degree in co-relation 20357. Up to 2687 conditions per place. [2024-06-21 21:23:01,615 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 234 selfloop transitions, 71 changer transitions 0/310 dead transitions. [2024-06-21 21:23:01,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 310 transitions, 4385 flow [2024-06-21 21:23:01,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:23:01,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:23:01,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 21:23:01,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-21 21:23:01,617 INFO L175 Difference]: Start difference. First operand has 127 places, 253 transitions, 3387 flow. Second operand 8 states and 151 transitions. [2024-06-21 21:23:01,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 310 transitions, 4385 flow [2024-06-21 21:23:01,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 310 transitions, 4259 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 21:23:01,679 INFO L231 Difference]: Finished difference. Result has 131 places, 272 transitions, 3631 flow [2024-06-21 21:23:01,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3275, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3631, PETRI_PLACES=131, PETRI_TRANSITIONS=272} [2024-06-21 21:23:01,680 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-21 21:23:01,680 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 272 transitions, 3631 flow [2024-06-21 21:23:01,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:01,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:01,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:01,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 21:23:01,680 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:23:01,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:01,681 INFO L85 PathProgramCache]: Analyzing trace with hash -717267439, now seen corresponding path program 1 times [2024-06-21 21:23:01,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:01,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069333182] [2024-06-21 21:23:01,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:01,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:01,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:04,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:04,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:04,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069333182] [2024-06-21 21:23:04,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069333182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:04,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:04,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:23:04,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481941014] [2024-06-21 21:23:04,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:04,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:23:04,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:04,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:23:04,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:23:04,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:23:04,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 272 transitions, 3631 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:04,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:04,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:23:04,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:06,552 INFO L124 PetriNetUnfolderBase]: 2220/3610 cut-off events. [2024-06-21 21:23:06,552 INFO L125 PetriNetUnfolderBase]: For 52880/52882 co-relation queries the response was YES. [2024-06-21 21:23:06,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21452 conditions, 3610 events. 2220/3610 cut-off events. For 52880/52882 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 20627 event pairs, 529 based on Foata normal form. 4/3613 useless extension candidates. Maximal degree in co-relation 21390. Up to 2538 conditions per place. [2024-06-21 21:23:06,579 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 145 selfloop transitions, 188 changer transitions 0/338 dead transitions. [2024-06-21 21:23:06,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 338 transitions, 4711 flow [2024-06-21 21:23:06,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:23:06,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:23:06,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 223 transitions. [2024-06-21 21:23:06,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44246031746031744 [2024-06-21 21:23:06,582 INFO L175 Difference]: Start difference. First operand has 131 places, 272 transitions, 3631 flow. Second operand 12 states and 223 transitions. [2024-06-21 21:23:06,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 338 transitions, 4711 flow [2024-06-21 21:23:06,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 338 transitions, 4622 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 21:23:06,650 INFO L231 Difference]: Finished difference. Result has 139 places, 281 transitions, 4069 flow [2024-06-21 21:23:06,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3542, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4069, PETRI_PLACES=139, PETRI_TRANSITIONS=281} [2024-06-21 21:23:06,651 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-21 21:23:06,651 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 281 transitions, 4069 flow [2024-06-21 21:23:06,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:06,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:06,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:06,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 21:23:06,652 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:23:06,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:06,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1902510461, now seen corresponding path program 2 times [2024-06-21 21:23:06,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:06,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994908988] [2024-06-21 21:23:06,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:06,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:06,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:09,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:09,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:09,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994908988] [2024-06-21 21:23:09,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994908988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:09,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:09,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:23:09,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075488107] [2024-06-21 21:23:09,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:09,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:23:09,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:09,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:23:09,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:23:09,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:23:09,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 281 transitions, 4069 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:09,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:09,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:23:09,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:11,161 INFO L124 PetriNetUnfolderBase]: 2215/3609 cut-off events. [2024-06-21 21:23:11,161 INFO L125 PetriNetUnfolderBase]: For 57172/57174 co-relation queries the response was YES. [2024-06-21 21:23:11,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22112 conditions, 3609 events. 2215/3609 cut-off events. For 57172/57174 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 20638 event pairs, 535 based on Foata normal form. 4/3612 useless extension candidates. Maximal degree in co-relation 22049. Up to 2533 conditions per place. [2024-06-21 21:23:11,188 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 134 selfloop transitions, 187 changer transitions 0/326 dead transitions. [2024-06-21 21:23:11,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 326 transitions, 4868 flow [2024-06-21 21:23:11,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:23:11,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:23:11,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-21 21:23:11,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 21:23:11,197 INFO L175 Difference]: Start difference. First operand has 139 places, 281 transitions, 4069 flow. Second operand 10 states and 190 transitions. [2024-06-21 21:23:11,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 326 transitions, 4868 flow [2024-06-21 21:23:11,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 326 transitions, 4245 flow, removed 24 selfloop flow, removed 12 redundant places. [2024-06-21 21:23:11,282 INFO L231 Difference]: Finished difference. Result has 137 places, 281 transitions, 3835 flow [2024-06-21 21:23:11,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3450, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3835, PETRI_PLACES=137, PETRI_TRANSITIONS=281} [2024-06-21 21:23:11,283 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-21 21:23:11,283 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 281 transitions, 3835 flow [2024-06-21 21:23:11,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:11,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:11,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:11,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 21:23:11,284 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:23:11,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:11,284 INFO L85 PathProgramCache]: Analyzing trace with hash -65752867, now seen corresponding path program 4 times [2024-06-21 21:23:11,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:11,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072975685] [2024-06-21 21:23:11,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:11,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:11,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:13,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:13,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:13,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072975685] [2024-06-21 21:23:13,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072975685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:13,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:13,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:23:13,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363234291] [2024-06-21 21:23:13,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:13,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:23:13,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:13,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:23:13,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:23:13,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:23:13,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 281 transitions, 3835 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:13,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:13,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:23:13,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:14,800 INFO L124 PetriNetUnfolderBase]: 2249/3666 cut-off events. [2024-06-21 21:23:14,801 INFO L125 PetriNetUnfolderBase]: For 58689/58697 co-relation queries the response was YES. [2024-06-21 21:23:14,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22234 conditions, 3666 events. 2249/3666 cut-off events. For 58689/58697 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 21094 event pairs, 355 based on Foata normal form. 12/3678 useless extension candidates. Maximal degree in co-relation 22172. Up to 2753 conditions per place. [2024-06-21 21:23:14,828 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 236 selfloop transitions, 75 changer transitions 0/316 dead transitions. [2024-06-21 21:23:14,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 316 transitions, 4693 flow [2024-06-21 21:23:14,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:23:14,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:23:14,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 21:23:14,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-21 21:23:14,829 INFO L175 Difference]: Start difference. First operand has 137 places, 281 transitions, 3835 flow. Second operand 7 states and 131 transitions. [2024-06-21 21:23:14,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 316 transitions, 4693 flow [2024-06-21 21:23:14,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 316 transitions, 4319 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 21:23:14,993 INFO L231 Difference]: Finished difference. Result has 135 places, 285 transitions, 3683 flow [2024-06-21 21:23:14,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3461, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3683, PETRI_PLACES=135, PETRI_TRANSITIONS=285} [2024-06-21 21:23:14,993 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2024-06-21 21:23:14,994 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 285 transitions, 3683 flow [2024-06-21 21:23:14,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:14,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:14,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:14,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 21:23:14,994 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:23:14,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:14,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1577195363, now seen corresponding path program 5 times [2024-06-21 21:23:14,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:14,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31712204] [2024-06-21 21:23:14,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:14,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:15,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:17,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:17,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:17,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31712204] [2024-06-21 21:23:17,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31712204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:17,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:17,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:23:17,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506332143] [2024-06-21 21:23:17,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:17,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:23:17,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:17,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:23:17,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:23:17,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:23:17,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 285 transitions, 3683 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:17,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:17,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:23:17,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:18,679 INFO L124 PetriNetUnfolderBase]: 2245/3657 cut-off events. [2024-06-21 21:23:18,679 INFO L125 PetriNetUnfolderBase]: For 59232/59253 co-relation queries the response was YES. [2024-06-21 21:23:18,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21946 conditions, 3657 events. 2245/3657 cut-off events. For 59232/59253 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 21004 event pairs, 500 based on Foata normal form. 21/3678 useless extension candidates. Maximal degree in co-relation 21883. Up to 3093 conditions per place. [2024-06-21 21:23:18,705 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 251 selfloop transitions, 59 changer transitions 0/315 dead transitions. [2024-06-21 21:23:18,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 315 transitions, 4443 flow [2024-06-21 21:23:18,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:23:18,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:23:18,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 21:23:18,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 21:23:18,707 INFO L175 Difference]: Start difference. First operand has 135 places, 285 transitions, 3683 flow. Second operand 8 states and 140 transitions. [2024-06-21 21:23:18,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 315 transitions, 4443 flow [2024-06-21 21:23:18,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 315 transitions, 4267 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 21:23:18,789 INFO L231 Difference]: Finished difference. Result has 137 places, 288 transitions, 3683 flow [2024-06-21 21:23:18,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3511, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3683, PETRI_PLACES=137, PETRI_TRANSITIONS=288} [2024-06-21 21:23:18,790 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-21 21:23:18,790 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 288 transitions, 3683 flow [2024-06-21 21:23:18,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:18,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:18,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:18,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 21:23:18,790 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:23:18,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:18,791 INFO L85 PathProgramCache]: Analyzing trace with hash -942758650, now seen corresponding path program 1 times [2024-06-21 21:23:18,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:18,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884174342] [2024-06-21 21:23:18,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:18,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:18,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:21,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:21,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:21,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884174342] [2024-06-21 21:23:21,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884174342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:21,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:21,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:23:21,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551025389] [2024-06-21 21:23:21,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:21,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:23:21,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:21,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:23:21,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:23:21,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:23:21,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 288 transitions, 3683 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:21,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:21,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:23:21,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:22,332 INFO L124 PetriNetUnfolderBase]: 2833/4543 cut-off events. [2024-06-21 21:23:22,333 INFO L125 PetriNetUnfolderBase]: For 79242/79246 co-relation queries the response was YES. [2024-06-21 21:23:22,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26452 conditions, 4543 events. 2833/4543 cut-off events. For 79242/79246 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 26721 event pairs, 565 based on Foata normal form. 20/4555 useless extension candidates. Maximal degree in co-relation 26390. Up to 2581 conditions per place. [2024-06-21 21:23:22,368 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 310 selfloop transitions, 63 changer transitions 0/378 dead transitions. [2024-06-21 21:23:22,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 378 transitions, 5089 flow [2024-06-21 21:23:22,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:23:22,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:23:22,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-21 21:23:22,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-06-21 21:23:22,369 INFO L175 Difference]: Start difference. First operand has 137 places, 288 transitions, 3683 flow. Second operand 9 states and 195 transitions. [2024-06-21 21:23:22,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 378 transitions, 5089 flow [2024-06-21 21:23:22,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 378 transitions, 4977 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 21:23:22,470 INFO L231 Difference]: Finished difference. Result has 145 places, 300 transitions, 3891 flow [2024-06-21 21:23:22,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3571, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3891, PETRI_PLACES=145, PETRI_TRANSITIONS=300} [2024-06-21 21:23:22,471 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-21 21:23:22,471 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 300 transitions, 3891 flow [2024-06-21 21:23:22,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:22,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:22,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:22,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 21:23:22,472 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:23:22,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:22,472 INFO L85 PathProgramCache]: Analyzing trace with hash 816038496, now seen corresponding path program 2 times [2024-06-21 21:23:22,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:22,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442262093] [2024-06-21 21:23:22,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:22,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:22,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:24,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:24,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:24,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442262093] [2024-06-21 21:23:24,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442262093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:24,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:24,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:23:24,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822009775] [2024-06-21 21:23:24,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:24,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:23:24,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:24,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:23:24,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:23:24,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:23:24,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 300 transitions, 3891 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:24,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:24,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:23:24,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:26,213 INFO L124 PetriNetUnfolderBase]: 2853/4570 cut-off events. [2024-06-21 21:23:26,213 INFO L125 PetriNetUnfolderBase]: For 86311/86315 co-relation queries the response was YES. [2024-06-21 21:23:26,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28794 conditions, 4570 events. 2853/4570 cut-off events. For 86311/86315 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 26762 event pairs, 657 based on Foata normal form. 8/4578 useless extension candidates. Maximal degree in co-relation 28727. Up to 3795 conditions per place. [2024-06-21 21:23:26,248 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 244 selfloop transitions, 97 changer transitions 0/346 dead transitions. [2024-06-21 21:23:26,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 346 transitions, 4772 flow [2024-06-21 21:23:26,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:23:26,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:23:26,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 21:23:26,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-21 21:23:26,250 INFO L175 Difference]: Start difference. First operand has 145 places, 300 transitions, 3891 flow. Second operand 9 states and 169 transitions. [2024-06-21 21:23:26,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 346 transitions, 4772 flow [2024-06-21 21:23:26,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 346 transitions, 4741 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-21 21:23:26,369 INFO L231 Difference]: Finished difference. Result has 152 places, 302 transitions, 4093 flow [2024-06-21 21:23:26,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3864, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4093, PETRI_PLACES=152, PETRI_TRANSITIONS=302} [2024-06-21 21:23:26,370 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 109 predicate places. [2024-06-21 21:23:26,370 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 302 transitions, 4093 flow [2024-06-21 21:23:26,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:26,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:26,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:26,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 21:23:26,371 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:23:26,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:26,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1010994736, now seen corresponding path program 3 times [2024-06-21 21:23:26,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:26,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724262538] [2024-06-21 21:23:26,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:26,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:26,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:28,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:28,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:28,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724262538] [2024-06-21 21:23:28,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724262538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:28,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:28,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:23:28,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931450225] [2024-06-21 21:23:28,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:28,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:23:28,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:28,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:23:28,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:23:28,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:23:28,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 302 transitions, 4093 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:28,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:28,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:23:28,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:30,085 INFO L124 PetriNetUnfolderBase]: 2873/4608 cut-off events. [2024-06-21 21:23:30,086 INFO L125 PetriNetUnfolderBase]: For 93776/93780 co-relation queries the response was YES. [2024-06-21 21:23:30,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29556 conditions, 4608 events. 2873/4608 cut-off events. For 93776/93780 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 27186 event pairs, 651 based on Foata normal form. 8/4616 useless extension candidates. Maximal degree in co-relation 29487. Up to 3737 conditions per place. [2024-06-21 21:23:30,125 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 242 selfloop transitions, 103 changer transitions 0/350 dead transitions. [2024-06-21 21:23:30,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 350 transitions, 4990 flow [2024-06-21 21:23:30,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:23:30,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:23:30,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 21:23:30,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-21 21:23:30,127 INFO L175 Difference]: Start difference. First operand has 152 places, 302 transitions, 4093 flow. Second operand 9 states and 170 transitions. [2024-06-21 21:23:30,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 350 transitions, 4990 flow [2024-06-21 21:23:30,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 350 transitions, 4784 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 21:23:30,266 INFO L231 Difference]: Finished difference. Result has 154 places, 304 transitions, 4133 flow [2024-06-21 21:23:30,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3887, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4133, PETRI_PLACES=154, PETRI_TRANSITIONS=304} [2024-06-21 21:23:30,267 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-21 21:23:30,267 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 304 transitions, 4133 flow [2024-06-21 21:23:30,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:30,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:30,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:30,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 21:23:30,268 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:23:30,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:30,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1993625488, now seen corresponding path program 4 times [2024-06-21 21:23:30,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:30,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933786596] [2024-06-21 21:23:30,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:30,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:30,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:31,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:31,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:31,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933786596] [2024-06-21 21:23:31,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933786596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:31,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:31,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:23:31,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931478964] [2024-06-21 21:23:31,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:31,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:23:31,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:31,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:23:31,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:23:31,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:23:31,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 304 transitions, 4133 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:31,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:31,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:23:31,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:33,612 INFO L124 PetriNetUnfolderBase]: 3244/5236 cut-off events. [2024-06-21 21:23:33,612 INFO L125 PetriNetUnfolderBase]: For 119829/119831 co-relation queries the response was YES. [2024-06-21 21:23:33,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33654 conditions, 5236 events. 3244/5236 cut-off events. For 119829/119831 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 31708 event pairs, 639 based on Foata normal form. 16/5251 useless extension candidates. Maximal degree in co-relation 33584. Up to 2581 conditions per place. [2024-06-21 21:23:33,649 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 166 selfloop transitions, 203 changer transitions 0/374 dead transitions. [2024-06-21 21:23:33,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 374 transitions, 5396 flow [2024-06-21 21:23:33,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:23:33,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:23:33,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-21 21:23:33,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-21 21:23:33,652 INFO L175 Difference]: Start difference. First operand has 154 places, 304 transitions, 4133 flow. Second operand 9 states and 183 transitions. [2024-06-21 21:23:33,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 374 transitions, 5396 flow [2024-06-21 21:23:33,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 374 transitions, 5149 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 21:23:33,782 INFO L231 Difference]: Finished difference. Result has 157 places, 315 transitions, 4561 flow [2024-06-21 21:23:33,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3912, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4561, PETRI_PLACES=157, PETRI_TRANSITIONS=315} [2024-06-21 21:23:33,782 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-21 21:23:33,782 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 315 transitions, 4561 flow [2024-06-21 21:23:33,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:33,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:33,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:33,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 21:23:33,783 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:23:33,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:33,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1143230150, now seen corresponding path program 5 times [2024-06-21 21:23:33,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:33,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645613197] [2024-06-21 21:23:33,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:33,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:33,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:36,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:36,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:36,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645613197] [2024-06-21 21:23:36,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645613197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:36,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:36,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:23:36,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558068431] [2024-06-21 21:23:36,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:36,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:23:36,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:36,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:23:36,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:23:36,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:23:36,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 315 transitions, 4561 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:36,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:36,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:23:36,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:37,804 INFO L124 PetriNetUnfolderBase]: 3621/5847 cut-off events. [2024-06-21 21:23:37,804 INFO L125 PetriNetUnfolderBase]: For 148843/148865 co-relation queries the response was YES. [2024-06-21 21:23:37,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38616 conditions, 5847 events. 3621/5847 cut-off events. For 148843/148865 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 36307 event pairs, 865 based on Foata normal form. 38/5885 useless extension candidates. Maximal degree in co-relation 38544. Up to 4220 conditions per place. [2024-06-21 21:23:37,858 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 323 selfloop transitions, 80 changer transitions 0/408 dead transitions. [2024-06-21 21:23:37,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 408 transitions, 6269 flow [2024-06-21 21:23:37,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:23:37,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:23:37,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-21 21:23:37,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132275132275133 [2024-06-21 21:23:37,860 INFO L175 Difference]: Start difference. First operand has 157 places, 315 transitions, 4561 flow. Second operand 9 states and 194 transitions. [2024-06-21 21:23:37,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 408 transitions, 6269 flow [2024-06-21 21:23:38,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 408 transitions, 6054 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-21 21:23:38,146 INFO L231 Difference]: Finished difference. Result has 165 places, 333 transitions, 4837 flow [2024-06-21 21:23:38,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4357, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4837, PETRI_PLACES=165, PETRI_TRANSITIONS=333} [2024-06-21 21:23:38,147 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-21 21:23:38,147 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 333 transitions, 4837 flow [2024-06-21 21:23:38,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:38,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:38,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:38,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 21:23:38,148 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:23:38,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:38,148 INFO L85 PathProgramCache]: Analyzing trace with hash -766022542, now seen corresponding path program 6 times [2024-06-21 21:23:38,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:38,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854205620] [2024-06-21 21:23:38,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:38,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:38,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:40,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:40,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:40,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854205620] [2024-06-21 21:23:40,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854205620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:40,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:40,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:23:40,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355225350] [2024-06-21 21:23:40,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:40,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:23:40,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:40,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:23:40,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:23:40,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:23:40,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 333 transitions, 4837 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:40,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:40,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:23:40,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:42,022 INFO L124 PetriNetUnfolderBase]: 3846/6249 cut-off events. [2024-06-21 21:23:42,022 INFO L125 PetriNetUnfolderBase]: For 173204/173226 co-relation queries the response was YES. [2024-06-21 21:23:42,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42377 conditions, 6249 events. 3846/6249 cut-off events. For 173204/173226 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 39713 event pairs, 1051 based on Foata normal form. 64/6312 useless extension candidates. Maximal degree in co-relation 42300. Up to 4745 conditions per place. [2024-06-21 21:23:42,076 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 184 selfloop transitions, 206 changer transitions 0/395 dead transitions. [2024-06-21 21:23:42,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 395 transitions, 6017 flow [2024-06-21 21:23:42,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:23:42,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:23:42,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 21:23:42,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-21 21:23:42,078 INFO L175 Difference]: Start difference. First operand has 165 places, 333 transitions, 4837 flow. Second operand 9 states and 179 transitions. [2024-06-21 21:23:42,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 395 transitions, 6017 flow [2024-06-21 21:23:42,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 395 transitions, 5948 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 21:23:42,308 INFO L231 Difference]: Finished difference. Result has 171 places, 348 transitions, 5518 flow [2024-06-21 21:23:42,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4769, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5518, PETRI_PLACES=171, PETRI_TRANSITIONS=348} [2024-06-21 21:23:42,309 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-21 21:23:42,309 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 348 transitions, 5518 flow [2024-06-21 21:23:42,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:42,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:42,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:42,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 21:23:42,310 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:23:42,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:42,310 INFO L85 PathProgramCache]: Analyzing trace with hash -760660162, now seen corresponding path program 7 times [2024-06-21 21:23:42,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:42,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875358177] [2024-06-21 21:23:42,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:42,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:42,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:44,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:44,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:44,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875358177] [2024-06-21 21:23:44,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875358177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:44,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:44,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:23:44,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448772121] [2024-06-21 21:23:44,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:44,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:23:44,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:44,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:23:44,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:23:44,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:23:44,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 348 transitions, 5518 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:44,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:44,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:23:44,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:47,273 INFO L124 PetriNetUnfolderBase]: 4016/6537 cut-off events. [2024-06-21 21:23:47,274 INFO L125 PetriNetUnfolderBase]: For 188051/188053 co-relation queries the response was YES. [2024-06-21 21:23:47,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45374 conditions, 6537 events. 4016/6537 cut-off events. For 188051/188053 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 42125 event pairs, 1124 based on Foata normal form. 44/6580 useless extension candidates. Maximal degree in co-relation 45294. Up to 5015 conditions per place. [2024-06-21 21:23:47,334 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 197 selfloop transitions, 198 changer transitions 0/400 dead transitions. [2024-06-21 21:23:47,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 400 transitions, 6571 flow [2024-06-21 21:23:47,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:23:47,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:23:47,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 21:23:47,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2024-06-21 21:23:47,336 INFO L175 Difference]: Start difference. First operand has 171 places, 348 transitions, 5518 flow. Second operand 10 states and 193 transitions. [2024-06-21 21:23:47,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 400 transitions, 6571 flow [2024-06-21 21:23:47,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 400 transitions, 6301 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 21:23:47,587 INFO L231 Difference]: Finished difference. Result has 176 places, 351 transitions, 5746 flow [2024-06-21 21:23:47,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5248, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5746, PETRI_PLACES=176, PETRI_TRANSITIONS=351} [2024-06-21 21:23:47,587 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-21 21:23:47,587 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 351 transitions, 5746 flow [2024-06-21 21:23:47,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:47,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:47,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:47,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 21:23:47,588 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:23:47,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:47,588 INFO L85 PathProgramCache]: Analyzing trace with hash -757471451, now seen corresponding path program 1 times [2024-06-21 21:23:47,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:47,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159071988] [2024-06-21 21:23:47,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:47,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:47,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:50,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:50,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:50,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159071988] [2024-06-21 21:23:50,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159071988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:50,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:50,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:23:50,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236026218] [2024-06-21 21:23:50,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:50,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:23:50,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:50,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:23:50,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:23:50,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:23:50,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 351 transitions, 5746 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:50,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:50,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:23:50,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:52,606 INFO L124 PetriNetUnfolderBase]: 4166/6793 cut-off events. [2024-06-21 21:23:52,607 INFO L125 PetriNetUnfolderBase]: For 199632/199634 co-relation queries the response was YES. [2024-06-21 21:23:52,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47063 conditions, 6793 events. 4166/6793 cut-off events. For 199632/199634 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 44344 event pairs, 1188 based on Foata normal form. 32/6824 useless extension candidates. Maximal degree in co-relation 46982. Up to 5377 conditions per place. [2024-06-21 21:23:52,661 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 196 selfloop transitions, 199 changer transitions 0/400 dead transitions. [2024-06-21 21:23:52,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 400 transitions, 6756 flow [2024-06-21 21:23:52,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:23:52,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:23:52,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-21 21:23:52,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-21 21:23:52,663 INFO L175 Difference]: Start difference. First operand has 176 places, 351 transitions, 5746 flow. Second operand 10 states and 192 transitions. [2024-06-21 21:23:52,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 400 transitions, 6756 flow [2024-06-21 21:23:52,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 400 transitions, 6351 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-21 21:23:52,945 INFO L231 Difference]: Finished difference. Result has 179 places, 354 transitions, 5827 flow [2024-06-21 21:23:52,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5341, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5827, PETRI_PLACES=179, PETRI_TRANSITIONS=354} [2024-06-21 21:23:52,946 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-21 21:23:52,946 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 354 transitions, 5827 flow [2024-06-21 21:23:52,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:52,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:52,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:52,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 21:23:52,946 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:23:52,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:52,947 INFO L85 PathProgramCache]: Analyzing trace with hash -109233958, now seen corresponding path program 1 times [2024-06-21 21:23:52,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:52,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752393339] [2024-06-21 21:23:52,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:52,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:52,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:54,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:54,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:54,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752393339] [2024-06-21 21:23:54,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752393339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:54,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:54,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:23:54,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449824955] [2024-06-21 21:23:54,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:54,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:23:54,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:54,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:23:54,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:23:54,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:23:54,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 354 transitions, 5827 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:54,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:54,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:23:54,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:56,053 INFO L124 PetriNetUnfolderBase]: 3815/6376 cut-off events. [2024-06-21 21:23:56,053 INFO L125 PetriNetUnfolderBase]: For 197345/197424 co-relation queries the response was YES. [2024-06-21 21:23:56,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45078 conditions, 6376 events. 3815/6376 cut-off events. For 197345/197424 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 43247 event pairs, 1242 based on Foata normal form. 63/6368 useless extension candidates. Maximal degree in co-relation 44996. Up to 5725 conditions per place. [2024-06-21 21:23:56,105 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 331 selfloop transitions, 21 changer transitions 0/388 dead transitions. [2024-06-21 21:23:56,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 388 transitions, 6799 flow [2024-06-21 21:23:56,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:23:56,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:23:56,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 21:23:56,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-21 21:23:56,106 INFO L175 Difference]: Start difference. First operand has 179 places, 354 transitions, 5827 flow. Second operand 7 states and 132 transitions. [2024-06-21 21:23:56,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 388 transitions, 6799 flow [2024-06-21 21:23:56,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 388 transitions, 6356 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-21 21:23:56,361 INFO L231 Difference]: Finished difference. Result has 179 places, 362 transitions, 5590 flow [2024-06-21 21:23:56,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5388, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5590, PETRI_PLACES=179, PETRI_TRANSITIONS=362} [2024-06-21 21:23:56,362 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-21 21:23:56,362 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 362 transitions, 5590 flow [2024-06-21 21:23:56,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:56,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:56,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:56,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 21:23:56,363 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:23:56,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:56,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1644756254, now seen corresponding path program 8 times [2024-06-21 21:23:56,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:56,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250885982] [2024-06-21 21:23:56,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:56,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:56,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:59,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:59,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:59,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250885982] [2024-06-21 21:23:59,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250885982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:59,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:59,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:23:59,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075177922] [2024-06-21 21:23:59,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:59,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:23:59,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:59,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:23:59,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:23:59,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:23:59,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 362 transitions, 5590 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:59,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:59,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:23:59,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:00,969 INFO L124 PetriNetUnfolderBase]: 4316/7084 cut-off events. [2024-06-21 21:24:00,969 INFO L125 PetriNetUnfolderBase]: For 215540/215540 co-relation queries the response was YES. [2024-06-21 21:24:01,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48242 conditions, 7084 events. 4316/7084 cut-off events. For 215540/215540 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 47017 event pairs, 922 based on Foata normal form. 24/7107 useless extension candidates. Maximal degree in co-relation 48158. Up to 3093 conditions per place. [2024-06-21 21:24:01,034 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 187 selfloop transitions, 224 changer transitions 0/416 dead transitions. [2024-06-21 21:24:01,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 416 transitions, 6881 flow [2024-06-21 21:24:01,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:24:01,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:24:01,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 21:24:01,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-21 21:24:01,036 INFO L175 Difference]: Start difference. First operand has 179 places, 362 transitions, 5590 flow. Second operand 8 states and 158 transitions. [2024-06-21 21:24:01,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 416 transitions, 6881 flow [2024-06-21 21:24:01,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 416 transitions, 6836 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-21 21:24:01,468 INFO L231 Difference]: Finished difference. Result has 185 places, 366 transitions, 6126 flow [2024-06-21 21:24:01,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5545, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6126, PETRI_PLACES=185, PETRI_TRANSITIONS=366} [2024-06-21 21:24:01,469 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-21 21:24:01,469 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 366 transitions, 6126 flow [2024-06-21 21:24:01,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:24:01,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:01,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:01,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 21:24:01,470 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:24:01,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:01,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1949623580, now seen corresponding path program 9 times [2024-06-21 21:24:01,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:01,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335547416] [2024-06-21 21:24:01,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:01,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:01,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:05,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:05,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:05,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335547416] [2024-06-21 21:24:05,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335547416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:05,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:05,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:24:05,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675443204] [2024-06-21 21:24:05,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:05,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:24:05,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:05,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:24:05,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:24:05,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:24:05,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 366 transitions, 6126 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:24:05,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:05,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:24:05,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:07,435 INFO L124 PetriNetUnfolderBase]: 4562/7499 cut-off events. [2024-06-21 21:24:07,435 INFO L125 PetriNetUnfolderBase]: For 253813/253813 co-relation queries the response was YES. [2024-06-21 21:24:07,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52123 conditions, 7499 events. 4562/7499 cut-off events. For 253813/253813 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 50547 event pairs, 1318 based on Foata normal form. 50/7548 useless extension candidates. Maximal degree in co-relation 52037. Up to 5613 conditions per place. [2024-06-21 21:24:07,511 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 199 selfloop transitions, 210 changer transitions 0/414 dead transitions. [2024-06-21 21:24:07,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 414 transitions, 7286 flow [2024-06-21 21:24:07,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:24:07,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:24:07,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 21:24:07,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-21 21:24:07,522 INFO L175 Difference]: Start difference. First operand has 185 places, 366 transitions, 6126 flow. Second operand 8 states and 155 transitions. [2024-06-21 21:24:07,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 414 transitions, 7286 flow [2024-06-21 21:24:08,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 414 transitions, 7012 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-21 21:24:08,006 INFO L231 Difference]: Finished difference. Result has 188 places, 370 transitions, 6420 flow [2024-06-21 21:24:08,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5852, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6420, PETRI_PLACES=188, PETRI_TRANSITIONS=370} [2024-06-21 21:24:08,007 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-21 21:24:08,007 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 370 transitions, 6420 flow [2024-06-21 21:24:08,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:24:08,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:08,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:08,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 21:24:08,007 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:24:08,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:08,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1648417664, now seen corresponding path program 10 times [2024-06-21 21:24:08,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:08,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842548279] [2024-06-21 21:24:08,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:08,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:10,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:10,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:10,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842548279] [2024-06-21 21:24:10,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842548279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:10,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:10,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:24:10,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793917301] [2024-06-21 21:24:10,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:10,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:24:10,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:10,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:24:10,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:24:10,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:24:10,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 370 transitions, 6420 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:24:10,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:10,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:24:10,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:12,939 INFO L124 PetriNetUnfolderBase]: 4692/7737 cut-off events. [2024-06-21 21:24:12,940 INFO L125 PetriNetUnfolderBase]: For 246079/246079 co-relation queries the response was YES. [2024-06-21 21:24:12,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54216 conditions, 7737 events. 4692/7737 cut-off events. For 246079/246079 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 52567 event pairs, 1315 based on Foata normal form. 26/7762 useless extension candidates. Maximal degree in co-relation 54129. Up to 5455 conditions per place. [2024-06-21 21:24:13,015 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 197 selfloop transitions, 223 changer transitions 0/425 dead transitions. [2024-06-21 21:24:13,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 425 transitions, 7647 flow [2024-06-21 21:24:13,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:24:13,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:24:13,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 21:24:13,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-21 21:24:13,017 INFO L175 Difference]: Start difference. First operand has 188 places, 370 transitions, 6420 flow. Second operand 8 states and 158 transitions. [2024-06-21 21:24:13,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 425 transitions, 7647 flow [2024-06-21 21:24:13,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 425 transitions, 7192 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 21:24:13,493 INFO L231 Difference]: Finished difference. Result has 190 places, 373 transitions, 6533 flow [2024-06-21 21:24:13,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5965, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6533, PETRI_PLACES=190, PETRI_TRANSITIONS=373} [2024-06-21 21:24:13,493 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-21 21:24:13,493 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 373 transitions, 6533 flow [2024-06-21 21:24:13,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:24:13,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:13,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:13,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 21:24:13,494 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:24:13,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:13,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1624254820, now seen corresponding path program 11 times [2024-06-21 21:24:13,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:13,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760832716] [2024-06-21 21:24:13,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:13,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:16,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:16,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:16,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760832716] [2024-06-21 21:24:16,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760832716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:16,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:16,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:24:16,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215830727] [2024-06-21 21:24:16,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:16,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:24:16,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:16,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:24:16,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:24:16,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:24:16,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 373 transitions, 6533 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:24:16,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:16,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:24:16,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:18,163 INFO L124 PetriNetUnfolderBase]: 4937/8215 cut-off events. [2024-06-21 21:24:18,163 INFO L125 PetriNetUnfolderBase]: For 272245/272265 co-relation queries the response was YES. [2024-06-21 21:24:18,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57336 conditions, 8215 events. 4937/8215 cut-off events. For 272245/272265 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 57111 event pairs, 1114 based on Foata normal form. 46/8260 useless extension candidates. Maximal degree in co-relation 57248. Up to 5111 conditions per place. [2024-06-21 21:24:18,242 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 199 selfloop transitions, 233 changer transitions 0/437 dead transitions. [2024-06-21 21:24:18,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 437 transitions, 8035 flow [2024-06-21 21:24:18,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:24:18,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:24:18,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-21 21:24:18,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-21 21:24:18,244 INFO L175 Difference]: Start difference. First operand has 190 places, 373 transitions, 6533 flow. Second operand 8 states and 164 transitions. [2024-06-21 21:24:18,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 437 transitions, 8035 flow [2024-06-21 21:24:18,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 437 transitions, 7542 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 21:24:18,757 INFO L231 Difference]: Finished difference. Result has 192 places, 378 transitions, 6702 flow [2024-06-21 21:24:18,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6040, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6702, PETRI_PLACES=192, PETRI_TRANSITIONS=378} [2024-06-21 21:24:18,758 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 149 predicate places. [2024-06-21 21:24:18,758 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 378 transitions, 6702 flow [2024-06-21 21:24:18,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:24:18,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:18,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:18,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 21:24:18,759 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:24:18,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:18,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1629765070, now seen corresponding path program 12 times [2024-06-21 21:24:18,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:18,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632915017] [2024-06-21 21:24:18,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:18,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:18,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:22,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:22,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:22,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632915017] [2024-06-21 21:24:22,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632915017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:22,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:22,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:24:22,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903758848] [2024-06-21 21:24:22,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:22,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:24:22,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:22,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:24:22,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:24:22,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:24:22,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 378 transitions, 6702 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:24:22,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:22,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:24:22,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:24,794 INFO L124 PetriNetUnfolderBase]: 5163/8591 cut-off events. [2024-06-21 21:24:24,794 INFO L125 PetriNetUnfolderBase]: For 303900/303900 co-relation queries the response was YES. [2024-06-21 21:24:24,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59913 conditions, 8591 events. 5163/8591 cut-off events. For 303900/303900 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 60253 event pairs, 1565 based on Foata normal form. 46/8636 useless extension candidates. Maximal degree in co-relation 59824. Up to 6566 conditions per place. [2024-06-21 21:24:24,891 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 225 selfloop transitions, 207 changer transitions 0/437 dead transitions. [2024-06-21 21:24:24,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 437 transitions, 8014 flow [2024-06-21 21:24:24,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:24:24,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:24:24,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 21:24:24,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 21:24:24,893 INFO L175 Difference]: Start difference. First operand has 192 places, 378 transitions, 6702 flow. Second operand 9 states and 171 transitions. [2024-06-21 21:24:24,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 437 transitions, 8014 flow [2024-06-21 21:24:25,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 437 transitions, 7709 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-21 21:24:25,434 INFO L231 Difference]: Finished difference. Result has 197 places, 381 transitions, 6963 flow [2024-06-21 21:24:25,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6397, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6963, PETRI_PLACES=197, PETRI_TRANSITIONS=381} [2024-06-21 21:24:25,435 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-21 21:24:25,435 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 381 transitions, 6963 flow [2024-06-21 21:24:25,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:24:25,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:25,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:25,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 21:24:25,436 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:24:25,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:25,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1624402690, now seen corresponding path program 13 times [2024-06-21 21:24:25,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:25,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526597418] [2024-06-21 21:24:25,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:25,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:25,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:28,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:28,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:28,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526597418] [2024-06-21 21:24:28,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526597418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:28,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:28,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:24:28,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58746134] [2024-06-21 21:24:28,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:28,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:24:28,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:28,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:24:28,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:24:28,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:24:28,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 381 transitions, 6963 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:24:28,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:28,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:24:28,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:30,693 INFO L124 PetriNetUnfolderBase]: 5375/8984 cut-off events. [2024-06-21 21:24:30,694 INFO L125 PetriNetUnfolderBase]: For 323725/323745 co-relation queries the response was YES. [2024-06-21 21:24:30,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62912 conditions, 8984 events. 5375/8984 cut-off events. For 323725/323745 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 64122 event pairs, 1668 based on Foata normal form. 64/9047 useless extension candidates. Maximal degree in co-relation 62821. Up to 6980 conditions per place. [2024-06-21 21:24:30,783 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 217 selfloop transitions, 216 changer transitions 0/438 dead transitions. [2024-06-21 21:24:30,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 438 transitions, 8275 flow [2024-06-21 21:24:30,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:24:30,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:24:30,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 21:24:30,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-06-21 21:24:30,785 INFO L175 Difference]: Start difference. First operand has 197 places, 381 transitions, 6963 flow. Second operand 8 states and 159 transitions. [2024-06-21 21:24:30,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 438 transitions, 8275 flow [2024-06-21 21:24:31,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 438 transitions, 7838 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-21 21:24:31,438 INFO L231 Difference]: Finished difference. Result has 198 places, 384 transitions, 7107 flow [2024-06-21 21:24:31,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6526, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7107, PETRI_PLACES=198, PETRI_TRANSITIONS=384} [2024-06-21 21:24:31,439 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-21 21:24:31,439 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 384 transitions, 7107 flow [2024-06-21 21:24:31,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:24:31,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:31,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:31,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 21:24:31,440 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:24:31,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:31,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1452799734, now seen corresponding path program 2 times [2024-06-21 21:24:31,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:31,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972369896] [2024-06-21 21:24:31,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:31,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:31,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:33,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:33,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:33,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972369896] [2024-06-21 21:24:33,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972369896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:33,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:33,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:24:33,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906772401] [2024-06-21 21:24:33,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:33,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:24:33,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:33,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:24:33,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:24:33,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:24:33,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 384 transitions, 7107 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:24:33,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:33,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:24:33,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:35,479 INFO L124 PetriNetUnfolderBase]: 4990/8445 cut-off events. [2024-06-21 21:24:35,479 INFO L125 PetriNetUnfolderBase]: For 311752/311875 co-relation queries the response was YES. [2024-06-21 21:24:35,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60357 conditions, 8445 events. 4990/8445 cut-off events. For 311752/311875 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 61513 event pairs, 1759 based on Foata normal form. 99/8426 useless extension candidates. Maximal degree in co-relation 60265. Up to 7693 conditions per place. [2024-06-21 21:24:35,558 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 346 selfloop transitions, 20 changer transitions 0/402 dead transitions. [2024-06-21 21:24:35,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 402 transitions, 7891 flow [2024-06-21 21:24:35,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:24:35,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:24:35,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-21 21:24:35,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 21:24:35,560 INFO L175 Difference]: Start difference. First operand has 198 places, 384 transitions, 7107 flow. Second operand 6 states and 110 transitions. [2024-06-21 21:24:35,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 402 transitions, 7891 flow [2024-06-21 21:24:36,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 402 transitions, 7405 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-21 21:24:36,094 INFO L231 Difference]: Finished difference. Result has 198 places, 384 transitions, 6672 flow [2024-06-21 21:24:36,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6621, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6672, PETRI_PLACES=198, PETRI_TRANSITIONS=384} [2024-06-21 21:24:36,094 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-21 21:24:36,095 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 384 transitions, 6672 flow [2024-06-21 21:24:36,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:24:36,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:36,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:36,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 21:24:36,095 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:24:36,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:36,096 INFO L85 PathProgramCache]: Analyzing trace with hash 241887344, now seen corresponding path program 14 times [2024-06-21 21:24:36,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:36,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976554514] [2024-06-21 21:24:36,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:36,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:36,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:39,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:39,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:39,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976554514] [2024-06-21 21:24:39,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976554514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:39,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:39,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:24:39,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737602010] [2024-06-21 21:24:39,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:39,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:24:39,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:39,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:24:39,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:24:39,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:24:39,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 384 transitions, 6672 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:24:39,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:39,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:24:39,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:42,140 INFO L124 PetriNetUnfolderBase]: 5595/9345 cut-off events. [2024-06-21 21:24:42,141 INFO L125 PetriNetUnfolderBase]: For 342374/342382 co-relation queries the response was YES. [2024-06-21 21:24:42,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64179 conditions, 9345 events. 5595/9345 cut-off events. For 342374/342382 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 67157 event pairs, 1682 based on Foata normal form. 49/9394 useless extension candidates. Maximal degree in co-relation 64086. Up to 7624 conditions per place. [2024-06-21 21:24:42,242 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 231 selfloop transitions, 215 changer transitions 0/451 dead transitions. [2024-06-21 21:24:42,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 451 transitions, 8118 flow [2024-06-21 21:24:42,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:24:42,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:24:42,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-21 21:24:42,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 21:24:42,244 INFO L175 Difference]: Start difference. First operand has 198 places, 384 transitions, 6672 flow. Second operand 10 states and 185 transitions. [2024-06-21 21:24:42,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 451 transitions, 8118 flow [2024-06-21 21:24:42,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 451 transitions, 8063 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 21:24:42,802 INFO L231 Difference]: Finished difference. Result has 204 places, 387 transitions, 7198 flow [2024-06-21 21:24:42,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6621, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7198, PETRI_PLACES=204, PETRI_TRANSITIONS=387} [2024-06-21 21:24:42,803 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-21 21:24:42,803 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 387 transitions, 7198 flow [2024-06-21 21:24:42,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:24:42,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:42,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:42,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 21:24:42,804 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:24:42,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:42,804 INFO L85 PathProgramCache]: Analyzing trace with hash 47947934, now seen corresponding path program 15 times [2024-06-21 21:24:42,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:42,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606639903] [2024-06-21 21:24:42,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:42,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:42,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:45,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:45,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:45,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606639903] [2024-06-21 21:24:45,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606639903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:45,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:45,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:24:45,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238369053] [2024-06-21 21:24:45,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:45,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:24:45,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:45,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:24:45,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:24:45,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:24:45,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 387 transitions, 7198 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:24:45,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:45,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:24:45,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:48,434 INFO L124 PetriNetUnfolderBase]: 5506/9181 cut-off events. [2024-06-21 21:24:48,435 INFO L125 PetriNetUnfolderBase]: For 315047/315055 co-relation queries the response was YES. [2024-06-21 21:24:48,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62199 conditions, 9181 events. 5506/9181 cut-off events. For 315047/315055 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 65751 event pairs, 1670 based on Foata normal form. 49/9229 useless extension candidates. Maximal degree in co-relation 62105. Up to 7489 conditions per place. [2024-06-21 21:24:48,531 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 229 selfloop transitions, 211 changer transitions 0/445 dead transitions. [2024-06-21 21:24:48,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 445 transitions, 8499 flow [2024-06-21 21:24:48,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:24:48,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:24:48,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 21:24:48,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-21 21:24:48,533 INFO L175 Difference]: Start difference. First operand has 204 places, 387 transitions, 7198 flow. Second operand 9 states and 169 transitions. [2024-06-21 21:24:48,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 445 transitions, 8499 flow [2024-06-21 21:24:49,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 445 transitions, 7989 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-21 21:24:49,235 INFO L231 Difference]: Finished difference. Result has 205 places, 387 transitions, 7130 flow [2024-06-21 21:24:49,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6688, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7130, PETRI_PLACES=205, PETRI_TRANSITIONS=387} [2024-06-21 21:24:49,235 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-21 21:24:49,235 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 387 transitions, 7130 flow [2024-06-21 21:24:49,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:24:49,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:49,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:49,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 21:24:49,236 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:24:49,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:49,236 INFO L85 PathProgramCache]: Analyzing trace with hash 48163415, now seen corresponding path program 2 times [2024-06-21 21:24:49,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:49,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112244543] [2024-06-21 21:24:49,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:49,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:49,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:52,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:52,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:52,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112244543] [2024-06-21 21:24:52,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112244543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:52,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:52,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:24:52,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309725118] [2024-06-21 21:24:52,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:52,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:24:52,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:52,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:24:52,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:24:52,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:24:52,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 387 transitions, 7130 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:24:52,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:52,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:24:52,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:54,934 INFO L124 PetriNetUnfolderBase]: 5540/9231 cut-off events. [2024-06-21 21:24:54,934 INFO L125 PetriNetUnfolderBase]: For 286843/286851 co-relation queries the response was YES. [2024-06-21 21:24:54,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61998 conditions, 9231 events. 5540/9231 cut-off events. For 286843/286851 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 66167 event pairs, 1682 based on Foata normal form. 9/9239 useless extension candidates. Maximal degree in co-relation 61903. Up to 7879 conditions per place. [2024-06-21 21:24:55,210 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 217 selfloop transitions, 214 changer transitions 0/436 dead transitions. [2024-06-21 21:24:55,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 436 transitions, 8385 flow [2024-06-21 21:24:55,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:24:55,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:24:55,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 21:24:55,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 21:24:55,211 INFO L175 Difference]: Start difference. First operand has 205 places, 387 transitions, 7130 flow. Second operand 9 states and 164 transitions. [2024-06-21 21:24:55,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 436 transitions, 8385 flow [2024-06-21 21:24:55,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 436 transitions, 7833 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-21 21:24:55,737 INFO L231 Difference]: Finished difference. Result has 207 places, 393 transitions, 7157 flow [2024-06-21 21:24:55,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6580, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7157, PETRI_PLACES=207, PETRI_TRANSITIONS=393} [2024-06-21 21:24:55,738 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-21 21:24:55,738 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 393 transitions, 7157 flow [2024-06-21 21:24:55,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:24:55,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:55,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:55,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 21:24:55,738 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:24:55,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:55,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1476835527, now seen corresponding path program 3 times [2024-06-21 21:24:55,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:55,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333888583] [2024-06-21 21:24:55,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:55,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:58,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:58,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:58,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333888583] [2024-06-21 21:24:58,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333888583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:58,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:58,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:24:58,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844413615] [2024-06-21 21:24:58,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:58,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:24:58,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:58,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:24:58,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:24:58,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:24:58,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 393 transitions, 7157 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:24:58,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:58,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:24:58,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:25:01,551 INFO L124 PetriNetUnfolderBase]: 5596/9318 cut-off events. [2024-06-21 21:25:01,551 INFO L125 PetriNetUnfolderBase]: For 293015/293023 co-relation queries the response was YES. [2024-06-21 21:25:01,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62563 conditions, 9318 events. 5596/9318 cut-off events. For 293015/293023 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 66821 event pairs, 1687 based on Foata normal form. 9/9326 useless extension candidates. Maximal degree in co-relation 62466. Up to 7947 conditions per place. [2024-06-21 21:25:01,639 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 215 selfloop transitions, 224 changer transitions 0/444 dead transitions. [2024-06-21 21:25:01,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 444 transitions, 8468 flow [2024-06-21 21:25:01,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:25:01,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:25:01,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 21:25:01,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 21:25:01,641 INFO L175 Difference]: Start difference. First operand has 207 places, 393 transitions, 7157 flow. Second operand 9 states and 164 transitions. [2024-06-21 21:25:01,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 444 transitions, 8468 flow [2024-06-21 21:25:02,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 444 transitions, 7958 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-21 21:25:02,252 INFO L231 Difference]: Finished difference. Result has 211 places, 404 transitions, 7346 flow [2024-06-21 21:25:02,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6659, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7346, PETRI_PLACES=211, PETRI_TRANSITIONS=404} [2024-06-21 21:25:02,253 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-21 21:25:02,253 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 404 transitions, 7346 flow [2024-06-21 21:25:02,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:25:02,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:25:02,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:25:02,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 21:25:02,254 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:25:02,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:25:02,254 INFO L85 PathProgramCache]: Analyzing trace with hash 249252665, now seen corresponding path program 4 times [2024-06-21 21:25:02,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:25:02,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947263655] [2024-06-21 21:25:02,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:25:02,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:25:02,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:25:05,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:25:05,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:25:05,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947263655] [2024-06-21 21:25:05,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947263655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:25:05,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:25:05,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:25:05,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525692643] [2024-06-21 21:25:05,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:25:05,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:25:05,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:25:05,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:25:05,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:25:05,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:25:05,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 404 transitions, 7346 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:25:05,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:25:05,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:25:05,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:25:08,285 INFO L124 PetriNetUnfolderBase]: 5583/9304 cut-off events. [2024-06-21 21:25:08,286 INFO L125 PetriNetUnfolderBase]: For 298402/298410 co-relation queries the response was YES. [2024-06-21 21:25:08,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62522 conditions, 9304 events. 5583/9304 cut-off events. For 298402/298410 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 66709 event pairs, 1675 based on Foata normal form. 9/9312 useless extension candidates. Maximal degree in co-relation 62423. Up to 7932 conditions per place. [2024-06-21 21:25:08,387 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 212 selfloop transitions, 231 changer transitions 0/448 dead transitions. [2024-06-21 21:25:08,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 448 transitions, 8555 flow [2024-06-21 21:25:08,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:25:08,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:25:08,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 21:25:08,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 21:25:08,389 INFO L175 Difference]: Start difference. First operand has 211 places, 404 transitions, 7346 flow. Second operand 9 states and 164 transitions. [2024-06-21 21:25:08,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 448 transitions, 8555 flow [2024-06-21 21:25:09,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 448 transitions, 8023 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-21 21:25:09,134 INFO L231 Difference]: Finished difference. Result has 215 places, 411 transitions, 7488 flow [2024-06-21 21:25:09,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6818, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7488, PETRI_PLACES=215, PETRI_TRANSITIONS=411} [2024-06-21 21:25:09,135 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-21 21:25:09,135 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 411 transitions, 7488 flow [2024-06-21 21:25:09,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:25:09,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:25:09,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:25:09,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 21:25:09,135 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:25:09,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:25:09,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1210811817, now seen corresponding path program 5 times [2024-06-21 21:25:09,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:25:09,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012704731] [2024-06-21 21:25:09,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:25:09,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:25:09,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:25:12,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:25:12,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:25:12,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012704731] [2024-06-21 21:25:12,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012704731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:25:12,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:25:12,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:25:12,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75348108] [2024-06-21 21:25:12,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:25:12,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:25:12,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:25:12,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:25:12,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:25:12,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:25:12,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 411 transitions, 7488 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:25:12,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:25:12,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:25:12,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:25:14,667 INFO L124 PetriNetUnfolderBase]: 5609/9357 cut-off events. [2024-06-21 21:25:14,667 INFO L125 PetriNetUnfolderBase]: For 303730/303738 co-relation queries the response was YES. [2024-06-21 21:25:14,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62907 conditions, 9357 events. 5609/9357 cut-off events. For 303730/303738 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 67028 event pairs, 1584 based on Foata normal form. 7/9363 useless extension candidates. Maximal degree in co-relation 62806. Up to 7396 conditions per place. [2024-06-21 21:25:14,774 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 206 selfloop transitions, 246 changer transitions 0/457 dead transitions. [2024-06-21 21:25:14,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 457 transitions, 8673 flow [2024-06-21 21:25:14,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:25:14,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:25:14,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 21:25:14,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 21:25:14,776 INFO L175 Difference]: Start difference. First operand has 215 places, 411 transitions, 7488 flow. Second operand 9 states and 168 transitions. [2024-06-21 21:25:14,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 457 transitions, 8673 flow [2024-06-21 21:25:15,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 457 transitions, 8202 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-21 21:25:15,578 INFO L231 Difference]: Finished difference. Result has 221 places, 415 transitions, 7653 flow [2024-06-21 21:25:15,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7017, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7653, PETRI_PLACES=221, PETRI_TRANSITIONS=415} [2024-06-21 21:25:15,579 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-21 21:25:15,579 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 415 transitions, 7653 flow [2024-06-21 21:25:15,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:25:15,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:25:15,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:25:15,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 21:25:15,580 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:25:15,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:25:15,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1024835124, now seen corresponding path program 3 times [2024-06-21 21:25:15,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:25:15,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63536703] [2024-06-21 21:25:15,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:25:15,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:25:15,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:25:17,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:25:17,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:25:17,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63536703] [2024-06-21 21:25:17,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63536703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:25:17,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:25:17,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:25:17,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051856951] [2024-06-21 21:25:17,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:25:17,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:25:17,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:25:17,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:25:17,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:25:17,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:25:17,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 415 transitions, 7653 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:25:17,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:25:17,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:25:17,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:25:19,883 INFO L124 PetriNetUnfolderBase]: 5224/8883 cut-off events. [2024-06-21 21:25:19,883 INFO L125 PetriNetUnfolderBase]: For 322834/322959 co-relation queries the response was YES. [2024-06-21 21:25:19,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60816 conditions, 8883 events. 5224/8883 cut-off events. For 322834/322959 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 65750 event pairs, 1792 based on Foata normal form. 101/8869 useless extension candidates. Maximal degree in co-relation 60713. Up to 8081 conditions per place. [2024-06-21 21:25:19,983 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 370 selfloop transitions, 24 changer transitions 0/430 dead transitions. [2024-06-21 21:25:19,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 430 transitions, 8525 flow [2024-06-21 21:25:19,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:25:19,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:25:19,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-21 21:25:19,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 21:25:19,985 INFO L175 Difference]: Start difference. First operand has 221 places, 415 transitions, 7653 flow. Second operand 6 states and 105 transitions. [2024-06-21 21:25:19,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 430 transitions, 8525 flow [2024-06-21 21:25:20,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 430 transitions, 8012 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 21:25:20,744 INFO L231 Difference]: Finished difference. Result has 221 places, 418 transitions, 7252 flow [2024-06-21 21:25:20,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7140, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7252, PETRI_PLACES=221, PETRI_TRANSITIONS=418} [2024-06-21 21:25:20,745 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-21 21:25:20,745 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 418 transitions, 7252 flow [2024-06-21 21:25:20,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:25:20,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:25:20,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:25:20,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 21:25:20,745 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:25:20,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:25:20,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1447079862, now seen corresponding path program 1 times [2024-06-21 21:25:20,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:25:20,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267118966] [2024-06-21 21:25:20,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:25:20,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:25:20,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:25:22,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:25:22,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:25:22,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267118966] [2024-06-21 21:25:22,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267118966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:25:22,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:25:22,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:25:22,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589686645] [2024-06-21 21:25:22,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:25:22,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:25:22,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:25:22,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:25:22,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:25:22,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:25:22,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 418 transitions, 7252 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:25:22,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:25:22,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:25:22,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:25:24,770 INFO L124 PetriNetUnfolderBase]: 5613/9414 cut-off events. [2024-06-21 21:25:24,771 INFO L125 PetriNetUnfolderBase]: For 318196/318196 co-relation queries the response was YES. [2024-06-21 21:25:24,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62704 conditions, 9414 events. 5613/9414 cut-off events. For 318196/318196 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 68193 event pairs, 2374 based on Foata normal form. 2/9414 useless extension candidates. Maximal degree in co-relation 62600. Up to 8808 conditions per place. [2024-06-21 21:25:24,858 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 420 selfloop transitions, 17 changer transitions 0/442 dead transitions. [2024-06-21 21:25:24,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 442 transitions, 8332 flow [2024-06-21 21:25:24,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:25:24,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:25:24,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-21 21:25:24,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 21:25:24,859 INFO L175 Difference]: Start difference. First operand has 221 places, 418 transitions, 7252 flow. Second operand 6 states and 106 transitions. [2024-06-21 21:25:24,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 442 transitions, 8332 flow [2024-06-21 21:25:25,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 442 transitions, 8242 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-21 21:25:25,557 INFO L231 Difference]: Finished difference. Result has 223 places, 424 transitions, 7276 flow [2024-06-21 21:25:25,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7162, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7276, PETRI_PLACES=223, PETRI_TRANSITIONS=424} [2024-06-21 21:25:25,558 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-21 21:25:25,558 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 424 transitions, 7276 flow [2024-06-21 21:25:25,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:25:25,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:25:25,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:25:25,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 21:25:25,558 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:25:25,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:25:25,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1010529492, now seen corresponding path program 2 times [2024-06-21 21:25:25,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:25:25,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941376973] [2024-06-21 21:25:25,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:25:25,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:25:25,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:25:27,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:25:27,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:25:27,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941376973] [2024-06-21 21:25:27,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941376973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:25:27,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:25:27,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:25:27,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788727435] [2024-06-21 21:25:27,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:25:27,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:25:27,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:25:27,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:25:27,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:25:27,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:25:27,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 424 transitions, 7276 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:25:27,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:25:27,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:25:27,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:25:29,311 INFO L124 PetriNetUnfolderBase]: 5607/9408 cut-off events. [2024-06-21 21:25:29,311 INFO L125 PetriNetUnfolderBase]: For 327910/327912 co-relation queries the response was YES. [2024-06-21 21:25:29,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63026 conditions, 9408 events. 5607/9408 cut-off events. For 327910/327912 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 68234 event pairs, 2373 based on Foata normal form. 4/9410 useless extension candidates. Maximal degree in co-relation 62921. Up to 8803 conditions per place. [2024-06-21 21:25:29,433 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 414 selfloop transitions, 17 changer transitions 0/436 dead transitions. [2024-06-21 21:25:29,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 436 transitions, 8170 flow [2024-06-21 21:25:29,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:25:29,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:25:29,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-21 21:25:29,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-21 21:25:29,435 INFO L175 Difference]: Start difference. First operand has 223 places, 424 transitions, 7276 flow. Second operand 6 states and 100 transitions. [2024-06-21 21:25:29,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 436 transitions, 8170 flow [2024-06-21 21:25:30,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 436 transitions, 8109 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-21 21:25:30,078 INFO L231 Difference]: Finished difference. Result has 227 places, 424 transitions, 7255 flow [2024-06-21 21:25:30,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7215, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7255, PETRI_PLACES=227, PETRI_TRANSITIONS=424} [2024-06-21 21:25:30,079 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 184 predicate places. [2024-06-21 21:25:30,079 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 424 transitions, 7255 flow [2024-06-21 21:25:30,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:25:30,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:25:30,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:25:30,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 21:25:30,080 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:25:30,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:25:30,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1440404694, now seen corresponding path program 1 times [2024-06-21 21:25:30,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:25:30,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361398579] [2024-06-21 21:25:30,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:25:30,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:25:30,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:25:32,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:25:32,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:25:32,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361398579] [2024-06-21 21:25:32,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361398579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:25:32,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:25:32,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:25:32,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561957167] [2024-06-21 21:25:32,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:25:32,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:25:32,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:25:32,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:25:32,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:25:32,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:25:32,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 424 transitions, 7255 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:25:32,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:25:32,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:25:32,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:25:34,427 INFO L124 PetriNetUnfolderBase]: 5238/8862 cut-off events. [2024-06-21 21:25:34,428 INFO L125 PetriNetUnfolderBase]: For 349611/349732 co-relation queries the response was YES. [2024-06-21 21:25:34,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60360 conditions, 8862 events. 5238/8862 cut-off events. For 349611/349732 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 65198 event pairs, 2140 based on Foata normal form. 93/8820 useless extension candidates. Maximal degree in co-relation 60253. Up to 8123 conditions per place. [2024-06-21 21:25:34,530 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 389 selfloop transitions, 11 changer transitions 0/438 dead transitions. [2024-06-21 21:25:34,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 438 transitions, 8119 flow [2024-06-21 21:25:34,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:25:34,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:25:34,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-21 21:25:34,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 21:25:34,532 INFO L175 Difference]: Start difference. First operand has 227 places, 424 transitions, 7255 flow. Second operand 6 states and 102 transitions. [2024-06-21 21:25:34,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 438 transitions, 8119 flow [2024-06-21 21:25:35,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 438 transitions, 8068 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 21:25:35,163 INFO L231 Difference]: Finished difference. Result has 227 places, 426 transitions, 7267 flow [2024-06-21 21:25:35,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7204, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7267, PETRI_PLACES=227, PETRI_TRANSITIONS=426} [2024-06-21 21:25:35,164 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 184 predicate places. [2024-06-21 21:25:35,164 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 426 transitions, 7267 flow [2024-06-21 21:25:35,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:25:35,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:25:35,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:25:35,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 21:25:35,165 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:25:35,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:25:35,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1116926197, now seen corresponding path program 1 times [2024-06-21 21:25:35,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:25:35,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600557064] [2024-06-21 21:25:35,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:25:35,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:25:35,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:25:37,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:25:37,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:25:37,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600557064] [2024-06-21 21:25:37,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600557064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:25:37,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:25:37,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:25:37,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585866293] [2024-06-21 21:25:37,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:25:37,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:25:37,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:25:37,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:25:37,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:25:37,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:25:37,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 426 transitions, 7267 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:25:37,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:25:37,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:25:37,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:25:39,609 INFO L124 PetriNetUnfolderBase]: 5660/9483 cut-off events. [2024-06-21 21:25:39,609 INFO L125 PetriNetUnfolderBase]: For 352747/352776 co-relation queries the response was YES. [2024-06-21 21:25:39,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64013 conditions, 9483 events. 5660/9483 cut-off events. For 352747/352776 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 68506 event pairs, 1692 based on Foata normal form. 37/9520 useless extension candidates. Maximal degree in co-relation 63906. Up to 8498 conditions per place. [2024-06-21 21:25:39,697 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 408 selfloop transitions, 75 changer transitions 0/488 dead transitions. [2024-06-21 21:25:39,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 488 transitions, 8937 flow [2024-06-21 21:25:39,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:25:39,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:25:39,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 21:25:39,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-21 21:25:39,700 INFO L175 Difference]: Start difference. First operand has 227 places, 426 transitions, 7267 flow. Second operand 8 states and 155 transitions. [2024-06-21 21:25:39,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 488 transitions, 8937 flow [2024-06-21 21:25:40,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 488 transitions, 8890 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 21:25:40,620 INFO L231 Difference]: Finished difference. Result has 234 places, 452 transitions, 7912 flow [2024-06-21 21:25:40,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7220, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7912, PETRI_PLACES=234, PETRI_TRANSITIONS=452} [2024-06-21 21:25:40,620 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-21 21:25:40,621 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 452 transitions, 7912 flow [2024-06-21 21:25:40,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:25:40,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:25:40,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:25:40,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 21:25:40,621 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:25:40,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:25:40,622 INFO L85 PathProgramCache]: Analyzing trace with hash 894981959, now seen corresponding path program 2 times [2024-06-21 21:25:40,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:25:40,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527163705] [2024-06-21 21:25:40,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:25:40,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:25:40,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:25:42,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:25:42,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:25:42,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527163705] [2024-06-21 21:25:42,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527163705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:25:42,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:25:42,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:25:42,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169789070] [2024-06-21 21:25:42,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:25:42,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:25:42,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:25:42,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:25:42,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:25:42,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:25:42,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 452 transitions, 7912 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:25:42,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:25:42,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:25:42,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:25:44,843 INFO L124 PetriNetUnfolderBase]: 5680/9518 cut-off events. [2024-06-21 21:25:44,843 INFO L125 PetriNetUnfolderBase]: For 364972/364992 co-relation queries the response was YES. [2024-06-21 21:25:44,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65627 conditions, 9518 events. 5680/9518 cut-off events. For 364972/364992 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 68839 event pairs, 1632 based on Foata normal form. 24/9542 useless extension candidates. Maximal degree in co-relation 65516. Up to 8514 conditions per place. [2024-06-21 21:25:44,961 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 416 selfloop transitions, 74 changer transitions 0/495 dead transitions. [2024-06-21 21:25:44,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 495 transitions, 9398 flow [2024-06-21 21:25:44,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:25:44,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:25:44,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 21:25:44,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-21 21:25:44,962 INFO L175 Difference]: Start difference. First operand has 234 places, 452 transitions, 7912 flow. Second operand 8 states and 157 transitions. [2024-06-21 21:25:44,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 495 transitions, 9398 flow [2024-06-21 21:25:45,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 495 transitions, 9261 flow, removed 57 selfloop flow, removed 3 redundant places. [2024-06-21 21:25:45,689 INFO L231 Difference]: Finished difference. Result has 239 places, 459 transitions, 8054 flow [2024-06-21 21:25:45,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7805, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8054, PETRI_PLACES=239, PETRI_TRANSITIONS=459} [2024-06-21 21:25:45,690 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-21 21:25:45,690 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 459 transitions, 8054 flow [2024-06-21 21:25:45,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:25:45,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:25:45,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:25:45,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 21:25:45,691 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:25:45,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:25:45,691 INFO L85 PathProgramCache]: Analyzing trace with hash -2098947150, now seen corresponding path program 1 times [2024-06-21 21:25:45,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:25:45,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390661546] [2024-06-21 21:25:45,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:25:45,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:25:45,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:25:49,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:25:49,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:25:49,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390661546] [2024-06-21 21:25:49,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390661546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:25:49,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:25:49,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:25:49,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754125606] [2024-06-21 21:25:49,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:25:49,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:25:49,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:25:49,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:25:49,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:25:49,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:25:49,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 459 transitions, 8054 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:25:49,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:25:49,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:25:49,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:25:52,733 INFO L124 PetriNetUnfolderBase]: 5796/9754 cut-off events. [2024-06-21 21:25:52,734 INFO L125 PetriNetUnfolderBase]: For 398156/398156 co-relation queries the response was YES. [2024-06-21 21:25:52,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67107 conditions, 9754 events. 5796/9754 cut-off events. For 398156/398156 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 71291 event pairs, 1693 based on Foata normal form. 18/9771 useless extension candidates. Maximal degree in co-relation 66995. Up to 7739 conditions per place. [2024-06-21 21:25:52,829 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 308 selfloop transitions, 214 changer transitions 0/527 dead transitions. [2024-06-21 21:25:52,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 527 transitions, 9452 flow [2024-06-21 21:25:52,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 21:25:52,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 21:25:52,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 241 transitions. [2024-06-21 21:25:52,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4413919413919414 [2024-06-21 21:25:52,831 INFO L175 Difference]: Start difference. First operand has 239 places, 459 transitions, 8054 flow. Second operand 13 states and 241 transitions. [2024-06-21 21:25:52,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 527 transitions, 9452 flow [2024-06-21 21:25:53,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 527 transitions, 9370 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 21:25:53,534 INFO L231 Difference]: Finished difference. Result has 250 places, 463 transitions, 8560 flow [2024-06-21 21:25:53,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7972, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8560, PETRI_PLACES=250, PETRI_TRANSITIONS=463} [2024-06-21 21:25:53,535 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-21 21:25:53,535 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 463 transitions, 8560 flow [2024-06-21 21:25:53,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:25:53,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:25:53,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:25:53,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 21:25:53,536 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:25:53,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:25:53,536 INFO L85 PathProgramCache]: Analyzing trace with hash 895310249, now seen corresponding path program 3 times [2024-06-21 21:25:53,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:25:53,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275875878] [2024-06-21 21:25:53,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:25:53,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:25:53,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:25:55,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:25:55,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:25:55,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275875878] [2024-06-21 21:25:55,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275875878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:25:55,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:25:55,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:25:55,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4668504] [2024-06-21 21:25:55,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:25:55,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:25:55,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:25:55,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:25:55,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:25:55,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:25:55,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 463 transitions, 8560 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:25:55,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:25:55,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:25:55,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:25:58,171 INFO L124 PetriNetUnfolderBase]: 5788/9723 cut-off events. [2024-06-21 21:25:58,171 INFO L125 PetriNetUnfolderBase]: For 398842/398848 co-relation queries the response was YES. [2024-06-21 21:25:58,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67858 conditions, 9723 events. 5788/9723 cut-off events. For 398842/398848 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 70866 event pairs, 1720 based on Foata normal form. 10/9733 useless extension candidates. Maximal degree in co-relation 67744. Up to 8711 conditions per place. [2024-06-21 21:25:58,306 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 415 selfloop transitions, 72 changer transitions 0/492 dead transitions. [2024-06-21 21:25:58,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 492 transitions, 9816 flow [2024-06-21 21:25:58,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:25:58,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:25:58,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 21:25:58,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 21:25:58,307 INFO L175 Difference]: Start difference. First operand has 250 places, 463 transitions, 8560 flow. Second operand 8 states and 148 transitions. [2024-06-21 21:25:58,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 492 transitions, 9816 flow [2024-06-21 21:25:59,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 492 transitions, 9324 flow, removed 42 selfloop flow, removed 10 redundant places. [2024-06-21 21:25:59,385 INFO L231 Difference]: Finished difference. Result has 248 places, 463 transitions, 8220 flow [2024-06-21 21:25:59,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8068, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8220, PETRI_PLACES=248, PETRI_TRANSITIONS=463} [2024-06-21 21:25:59,385 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 205 predicate places. [2024-06-21 21:25:59,385 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 463 transitions, 8220 flow [2024-06-21 21:25:59,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:25:59,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:25:59,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:25:59,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 21:25:59,386 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:25:59,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:25:59,386 INFO L85 PathProgramCache]: Analyzing trace with hash -111463691, now seen corresponding path program 4 times [2024-06-21 21:25:59,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:25:59,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484168068] [2024-06-21 21:25:59,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:25:59,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:25:59,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:26:01,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:26:01,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:26:01,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484168068] [2024-06-21 21:26:01,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484168068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:26:01,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:26:01,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:26:01,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143802807] [2024-06-21 21:26:01,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:26:01,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:26:01,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:26:01,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:26:01,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:26:02,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:26:02,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 463 transitions, 8220 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:26:02,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:26:02,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:26:02,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:26:04,837 INFO L124 PetriNetUnfolderBase]: 5808/9773 cut-off events. [2024-06-21 21:26:04,837 INFO L125 PetriNetUnfolderBase]: For 400919/400937 co-relation queries the response was YES. [2024-06-21 21:26:04,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67361 conditions, 9773 events. 5808/9773 cut-off events. For 400919/400937 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 71467 event pairs, 1769 based on Foata normal form. 22/9795 useless extension candidates. Maximal degree in co-relation 67246. Up to 8727 conditions per place. [2024-06-21 21:26:04,954 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 399 selfloop transitions, 95 changer transitions 0/499 dead transitions. [2024-06-21 21:26:04,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 499 transitions, 9572 flow [2024-06-21 21:26:04,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:26:04,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:26:04,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 21:26:04,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 21:26:04,955 INFO L175 Difference]: Start difference. First operand has 248 places, 463 transitions, 8220 flow. Second operand 9 states and 161 transitions. [2024-06-21 21:26:04,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 499 transitions, 9572 flow [2024-06-21 21:26:06,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 499 transitions, 9435 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 21:26:06,009 INFO L231 Difference]: Finished difference. Result has 252 places, 467 transitions, 8363 flow [2024-06-21 21:26:06,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8089, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8363, PETRI_PLACES=252, PETRI_TRANSITIONS=467} [2024-06-21 21:26:06,009 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-21 21:26:06,009 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 467 transitions, 8363 flow [2024-06-21 21:26:06,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:26:06,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:26:06,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:26:06,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 21:26:06,010 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:26:06,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:26:06,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1010208990, now seen corresponding path program 2 times [2024-06-21 21:26:06,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:26:06,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516407884] [2024-06-21 21:26:06,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:26:06,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:26:06,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:26:09,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:26:09,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:26:09,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516407884] [2024-06-21 21:26:09,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516407884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:26:09,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:26:09,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:26:09,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393578653] [2024-06-21 21:26:09,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:26:09,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:26:09,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:26:09,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:26:09,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:26:09,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:26:09,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 467 transitions, 8363 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:26:09,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:26:09,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:26:09,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:26:12,644 INFO L124 PetriNetUnfolderBase]: 5924/10017 cut-off events. [2024-06-21 21:26:12,644 INFO L125 PetriNetUnfolderBase]: For 436664/436664 co-relation queries the response was YES. [2024-06-21 21:26:12,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68992 conditions, 10017 events. 5924/10017 cut-off events. For 436664/436664 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 74055 event pairs, 1716 based on Foata normal form. 18/10034 useless extension candidates. Maximal degree in co-relation 68876. Up to 7379 conditions per place. [2024-06-21 21:26:12,779 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 302 selfloop transitions, 230 changer transitions 0/537 dead transitions. [2024-06-21 21:26:12,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 537 transitions, 9897 flow [2024-06-21 21:26:12,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:26:12,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:26:12,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 219 transitions. [2024-06-21 21:26:12,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 21:26:12,781 INFO L175 Difference]: Start difference. First operand has 252 places, 467 transitions, 8363 flow. Second operand 12 states and 219 transitions. [2024-06-21 21:26:12,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 537 transitions, 9897 flow [2024-06-21 21:26:13,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 537 transitions, 9653 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-21 21:26:13,752 INFO L231 Difference]: Finished difference. Result has 258 places, 474 transitions, 8829 flow [2024-06-21 21:26:13,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8119, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8829, PETRI_PLACES=258, PETRI_TRANSITIONS=474} [2024-06-21 21:26:13,753 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-21 21:26:13,753 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 474 transitions, 8829 flow [2024-06-21 21:26:13,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:26:13,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:26:13,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:26:13,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 21:26:13,754 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:26:13,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:26:13,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1718003181, now seen corresponding path program 5 times [2024-06-21 21:26:13,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:26:13,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413581865] [2024-06-21 21:26:13,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:26:13,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:26:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:26:16,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:26:16,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:26:16,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413581865] [2024-06-21 21:26:16,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413581865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:26:16,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:26:16,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:26:16,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060107453] [2024-06-21 21:26:16,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:26:16,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:26:16,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:26:16,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:26:16,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:26:16,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:26:16,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 474 transitions, 8829 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:26:16,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:26:16,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:26:16,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:26:18,689 INFO L124 PetriNetUnfolderBase]: 5916/9976 cut-off events. [2024-06-21 21:26:18,689 INFO L125 PetriNetUnfolderBase]: For 409138/409144 co-relation queries the response was YES. [2024-06-21 21:26:18,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69349 conditions, 9976 events. 5916/9976 cut-off events. For 409138/409144 co-relation queries the response was YES. Maximal size of possible extension queue 658. Compared 73439 event pairs, 1805 based on Foata normal form. 10/9986 useless extension candidates. Maximal degree in co-relation 69232. Up to 8924 conditions per place. [2024-06-21 21:26:18,792 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 413 selfloop transitions, 77 changer transitions 0/495 dead transitions. [2024-06-21 21:26:18,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 495 transitions, 9973 flow [2024-06-21 21:26:18,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:26:18,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:26:18,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 21:26:18,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-21 21:26:18,794 INFO L175 Difference]: Start difference. First operand has 258 places, 474 transitions, 8829 flow. Second operand 7 states and 125 transitions. [2024-06-21 21:26:18,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 495 transitions, 9973 flow [2024-06-21 21:26:19,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 495 transitions, 9472 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-06-21 21:26:19,706 INFO L231 Difference]: Finished difference. Result has 258 places, 474 transitions, 8498 flow [2024-06-21 21:26:19,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8330, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8498, PETRI_PLACES=258, PETRI_TRANSITIONS=474} [2024-06-21 21:26:19,708 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-21 21:26:19,709 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 474 transitions, 8498 flow [2024-06-21 21:26:19,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:26:19,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:26:19,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:26:19,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 21:26:19,709 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:26:19,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:26:19,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1183081664, now seen corresponding path program 3 times [2024-06-21 21:26:19,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:26:19,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376747617] [2024-06-21 21:26:19,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:26:19,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:26:19,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:26:23,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:26:23,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:26:23,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376747617] [2024-06-21 21:26:23,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376747617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:26:23,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:26:23,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:26:23,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161751123] [2024-06-21 21:26:23,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:26:23,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:26:23,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:26:23,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:26:23,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:26:23,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:26:23,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 474 transitions, 8498 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:26:23,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:26:23,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:26:23,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:26:26,549 INFO L124 PetriNetUnfolderBase]: 6032/10191 cut-off events. [2024-06-21 21:26:26,550 INFO L125 PetriNetUnfolderBase]: For 423158/423160 co-relation queries the response was YES. [2024-06-21 21:26:26,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69473 conditions, 10191 events. 6032/10191 cut-off events. For 423158/423160 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 75601 event pairs, 1891 based on Foata normal form. 18/10209 useless extension candidates. Maximal degree in co-relation 69356. Up to 8323 conditions per place. [2024-06-21 21:26:26,682 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 303 selfloop transitions, 232 changer transitions 0/540 dead transitions. [2024-06-21 21:26:26,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 540 transitions, 10054 flow [2024-06-21 21:26:26,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:26:26,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:26:26,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 216 transitions. [2024-06-21 21:26:26,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 21:26:26,691 INFO L175 Difference]: Start difference. First operand has 258 places, 474 transitions, 8498 flow. Second operand 12 states and 216 transitions. [2024-06-21 21:26:26,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 540 transitions, 10054 flow [2024-06-21 21:26:27,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 540 transitions, 9890 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 21:26:27,600 INFO L231 Difference]: Finished difference. Result has 265 places, 481 transitions, 9020 flow [2024-06-21 21:26:27,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8334, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9020, PETRI_PLACES=265, PETRI_TRANSITIONS=481} [2024-06-21 21:26:27,601 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-21 21:26:27,601 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 481 transitions, 9020 flow [2024-06-21 21:26:27,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:26:27,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:26:27,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:26:27,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 21:26:27,601 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:26:27,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:26:27,602 INFO L85 PathProgramCache]: Analyzing trace with hash 865224320, now seen corresponding path program 4 times [2024-06-21 21:26:27,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:26:27,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240554931] [2024-06-21 21:26:27,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:26:27,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:26:27,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:26:31,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:26:31,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:26:31,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240554931] [2024-06-21 21:26:31,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240554931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:26:31,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:26:31,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:26:31,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742686594] [2024-06-21 21:26:31,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:26:31,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:26:31,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:26:31,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:26:31,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:26:31,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:26:31,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 481 transitions, 9020 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:26:31,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:26:31,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:26:31,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:26:34,767 INFO L124 PetriNetUnfolderBase]: 6261/10635 cut-off events. [2024-06-21 21:26:34,768 INFO L125 PetriNetUnfolderBase]: For 436581/436583 co-relation queries the response was YES. [2024-06-21 21:26:34,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72473 conditions, 10635 events. 6261/10635 cut-off events. For 436581/436583 co-relation queries the response was YES. Maximal size of possible extension queue 716. Compared 80199 event pairs, 1935 based on Foata normal form. 18/10652 useless extension candidates. Maximal degree in co-relation 72354. Up to 8715 conditions per place. [2024-06-21 21:26:34,907 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 299 selfloop transitions, 257 changer transitions 0/561 dead transitions. [2024-06-21 21:26:34,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 561 transitions, 10772 flow [2024-06-21 21:26:34,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 21:26:34,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 21:26:34,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 232 transitions. [2024-06-21 21:26:34,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4249084249084249 [2024-06-21 21:26:34,909 INFO L175 Difference]: Start difference. First operand has 265 places, 481 transitions, 9020 flow. Second operand 13 states and 232 transitions. [2024-06-21 21:26:34,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 561 transitions, 10772 flow [2024-06-21 21:26:36,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 561 transitions, 10219 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-21 21:26:36,083 INFO L231 Difference]: Finished difference. Result has 272 places, 497 transitions, 9409 flow [2024-06-21 21:26:36,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8485, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9409, PETRI_PLACES=272, PETRI_TRANSITIONS=497} [2024-06-21 21:26:36,092 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-21 21:26:36,093 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 497 transitions, 9409 flow [2024-06-21 21:26:36,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:26:36,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:26:36,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:26:36,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 21:26:36,093 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:26:36,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:26:36,094 INFO L85 PathProgramCache]: Analyzing trace with hash 875343650, now seen corresponding path program 5 times [2024-06-21 21:26:36,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:26:36,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447293101] [2024-06-21 21:26:36,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:26:36,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:26:36,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:26:39,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:26:39,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:26:39,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447293101] [2024-06-21 21:26:39,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447293101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:26:39,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:26:39,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:26:39,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007070359] [2024-06-21 21:26:39,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:26:39,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:26:39,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:26:39,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:26:39,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:26:39,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:26:39,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 497 transitions, 9409 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:26:39,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:26:39,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:26:39,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:26:43,058 INFO L124 PetriNetUnfolderBase]: 6275/10683 cut-off events. [2024-06-21 21:26:43,058 INFO L125 PetriNetUnfolderBase]: For 424045/424047 co-relation queries the response was YES. [2024-06-21 21:26:43,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72282 conditions, 10683 events. 6275/10683 cut-off events. For 424045/424047 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 80443 event pairs, 1943 based on Foata normal form. 12/10694 useless extension candidates. Maximal degree in co-relation 72160. Up to 6656 conditions per place. [2024-06-21 21:26:43,193 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 272 selfloop transitions, 284 changer transitions 0/561 dead transitions. [2024-06-21 21:26:43,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 561 transitions, 10945 flow [2024-06-21 21:26:43,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:26:43,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:26:43,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 218 transitions. [2024-06-21 21:26:43,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-21 21:26:43,195 INFO L175 Difference]: Start difference. First operand has 272 places, 497 transitions, 9409 flow. Second operand 12 states and 218 transitions. [2024-06-21 21:26:43,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 561 transitions, 10945 flow [2024-06-21 21:26:44,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 561 transitions, 10456 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-21 21:26:44,234 INFO L231 Difference]: Finished difference. Result has 278 places, 499 transitions, 9636 flow [2024-06-21 21:26:44,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8920, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9636, PETRI_PLACES=278, PETRI_TRANSITIONS=499} [2024-06-21 21:26:44,235 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-21 21:26:44,235 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 499 transitions, 9636 flow [2024-06-21 21:26:44,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:26:44,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:26:44,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:26:44,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 21:26:44,235 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:26:44,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:26:44,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1218543232, now seen corresponding path program 6 times [2024-06-21 21:26:44,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:26:44,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155676061] [2024-06-21 21:26:44,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:26:44,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:26:44,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:26:47,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:26:47,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:26:47,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155676061] [2024-06-21 21:26:47,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155676061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:26:47,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:26:47,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:26:47,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467270177] [2024-06-21 21:26:47,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:26:47,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:26:47,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:26:47,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:26:47,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:26:47,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:26:47,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 499 transitions, 9636 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:26:47,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:26:47,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:26:47,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:26:51,365 INFO L124 PetriNetUnfolderBase]: 6242/10609 cut-off events. [2024-06-21 21:26:51,365 INFO L125 PetriNetUnfolderBase]: For 423119/423121 co-relation queries the response was YES. [2024-06-21 21:26:51,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71581 conditions, 10609 events. 6242/10609 cut-off events. For 423119/423121 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 79973 event pairs, 1945 based on Foata normal form. 18/10626 useless extension candidates. Maximal degree in co-relation 71457. Up to 8670 conditions per place. [2024-06-21 21:26:51,493 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 314 selfloop transitions, 245 changer transitions 0/564 dead transitions. [2024-06-21 21:26:51,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 564 transitions, 10996 flow [2024-06-21 21:26:51,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 21:26:51,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 21:26:51,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 233 transitions. [2024-06-21 21:26:51,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4267399267399267 [2024-06-21 21:26:51,496 INFO L175 Difference]: Start difference. First operand has 278 places, 499 transitions, 9636 flow. Second operand 13 states and 233 transitions. [2024-06-21 21:26:51,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 564 transitions, 10996 flow [2024-06-21 21:26:52,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 564 transitions, 10328 flow, removed 36 selfloop flow, removed 9 redundant places. [2024-06-21 21:26:52,637 INFO L231 Difference]: Finished difference. Result has 281 places, 498 transitions, 9373 flow [2024-06-21 21:26:52,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8878, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9373, PETRI_PLACES=281, PETRI_TRANSITIONS=498} [2024-06-21 21:26:52,638 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-21 21:26:52,638 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 498 transitions, 9373 flow [2024-06-21 21:26:52,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:26:52,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:26:52,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:26:52,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 21:26:52,639 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:26:52,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:26:52,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1705116171, now seen corresponding path program 6 times [2024-06-21 21:26:52,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:26:52,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133294360] [2024-06-21 21:26:52,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:26:52,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:26:52,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:26:54,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:26:54,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:26:54,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133294360] [2024-06-21 21:26:55,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133294360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:26:55,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:26:55,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:26:55,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299356998] [2024-06-21 21:26:55,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:26:55,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:26:55,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:26:55,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:26:55,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:26:55,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:26:55,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 498 transitions, 9373 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:26:55,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:26:55,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:26:55,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:26:57,620 INFO L124 PetriNetUnfolderBase]: 6250/10619 cut-off events. [2024-06-21 21:26:57,621 INFO L125 PetriNetUnfolderBase]: For 409491/409511 co-relation queries the response was YES. [2024-06-21 21:26:57,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70131 conditions, 10619 events. 6250/10619 cut-off events. For 409491/409511 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 79983 event pairs, 2014 based on Foata normal form. 16/10634 useless extension candidates. Maximal degree in co-relation 70007. Up to 9417 conditions per place. [2024-06-21 21:26:57,771 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 431 selfloop transitions, 86 changer transitions 0/522 dead transitions. [2024-06-21 21:26:57,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 522 transitions, 10793 flow [2024-06-21 21:26:57,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:26:57,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:26:57,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 21:26:57,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-21 21:26:57,772 INFO L175 Difference]: Start difference. First operand has 281 places, 498 transitions, 9373 flow. Second operand 7 states and 121 transitions. [2024-06-21 21:26:57,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 522 transitions, 10793 flow [2024-06-21 21:26:58,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 522 transitions, 9723 flow, removed 31 selfloop flow, removed 16 redundant places. [2024-06-21 21:26:58,840 INFO L231 Difference]: Finished difference. Result has 273 places, 506 transitions, 8635 flow [2024-06-21 21:26:58,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8307, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8635, PETRI_PLACES=273, PETRI_TRANSITIONS=506} [2024-06-21 21:26:58,841 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-21 21:26:58,841 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 506 transitions, 8635 flow [2024-06-21 21:26:58,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:26:58,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:26:58,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:26:58,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 21:26:58,841 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:26:58,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:26:58,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1013861741, now seen corresponding path program 1 times [2024-06-21 21:26:58,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:26:58,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650431351] [2024-06-21 21:26:58,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:26:58,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:26:58,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:27:00,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:27:00,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:27:00,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650431351] [2024-06-21 21:27:00,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650431351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:27:00,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:27:00,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:27:00,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770370451] [2024-06-21 21:27:00,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:27:00,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:27:00,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:27:00,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:27:00,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:27:00,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:27:00,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 506 transitions, 8635 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:27:00,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:27:00,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:27:00,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:27:03,243 INFO L124 PetriNetUnfolderBase]: 6260/10644 cut-off events. [2024-06-21 21:27:03,243 INFO L125 PetriNetUnfolderBase]: For 398099/398099 co-relation queries the response was YES. [2024-06-21 21:27:03,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68128 conditions, 10644 events. 6260/10644 cut-off events. For 398099/398099 co-relation queries the response was YES. Maximal size of possible extension queue 716. Compared 80472 event pairs, 2714 based on Foata normal form. 2/10644 useless extension candidates. Maximal degree in co-relation 68006. Up to 9866 conditions per place. [2024-06-21 21:27:03,374 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 506 selfloop transitions, 25 changer transitions 0/536 dead transitions. [2024-06-21 21:27:03,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 536 transitions, 9951 flow [2024-06-21 21:27:03,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:27:03,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:27:03,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 21:27:03,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-21 21:27:03,376 INFO L175 Difference]: Start difference. First operand has 273 places, 506 transitions, 8635 flow. Second operand 7 states and 123 transitions. [2024-06-21 21:27:03,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 536 transitions, 9951 flow [2024-06-21 21:27:04,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 536 transitions, 9765 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-21 21:27:04,520 INFO L231 Difference]: Finished difference. Result has 277 places, 512 transitions, 8585 flow [2024-06-21 21:27:04,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8451, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8585, PETRI_PLACES=277, PETRI_TRANSITIONS=512} [2024-06-21 21:27:04,521 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-21 21:27:04,521 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 512 transitions, 8585 flow [2024-06-21 21:27:04,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:27:04,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:27:04,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:27:04,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 21:27:04,522 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:27:04,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:27:04,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1712283123, now seen corresponding path program 2 times [2024-06-21 21:27:04,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:27:04,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987327692] [2024-06-21 21:27:04,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:27:04,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:27:04,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:27:06,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:27:06,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:27:06,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987327692] [2024-06-21 21:27:06,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987327692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:27:06,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:27:06,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:27:06,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605706442] [2024-06-21 21:27:06,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:27:06,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:27:06,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:27:06,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:27:06,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:27:06,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:27:06,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 512 transitions, 8585 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:27:06,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:27:06,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:27:06,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:27:09,639 INFO L124 PetriNetUnfolderBase]: 6270/10658 cut-off events. [2024-06-21 21:27:09,639 INFO L125 PetriNetUnfolderBase]: For 396619/396619 co-relation queries the response was YES. [2024-06-21 21:27:09,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68281 conditions, 10658 events. 6270/10658 cut-off events. For 396619/396619 co-relation queries the response was YES. Maximal size of possible extension queue 716. Compared 80636 event pairs, 2714 based on Foata normal form. 2/10658 useless extension candidates. Maximal degree in co-relation 68157. Up to 9876 conditions per place. [2024-06-21 21:27:09,762 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 503 selfloop transitions, 27 changer transitions 0/535 dead transitions. [2024-06-21 21:27:09,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 535 transitions, 9853 flow [2024-06-21 21:27:09,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:27:09,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:27:09,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 21:27:09,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-21 21:27:09,763 INFO L175 Difference]: Start difference. First operand has 277 places, 512 transitions, 8585 flow. Second operand 7 states and 120 transitions. [2024-06-21 21:27:09,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 535 transitions, 9853 flow [2024-06-21 21:27:10,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 535 transitions, 9780 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-21 21:27:10,723 INFO L231 Difference]: Finished difference. Result has 281 places, 515 transitions, 8614 flow [2024-06-21 21:27:10,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8524, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8614, PETRI_PLACES=281, PETRI_TRANSITIONS=515} [2024-06-21 21:27:10,724 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-21 21:27:10,724 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 515 transitions, 8614 flow [2024-06-21 21:27:10,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:27:10,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:27:10,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:27:10,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 21:27:10,724 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:27:10,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:27:10,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1254491553, now seen corresponding path program 3 times [2024-06-21 21:27:10,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:27:10,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068401747] [2024-06-21 21:27:10,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:27:10,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:27:10,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:27:12,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:27:12,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:27:12,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068401747] [2024-06-21 21:27:12,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068401747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:27:12,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:27:12,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:27:12,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555862022] [2024-06-21 21:27:12,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:27:12,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:27:12,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:27:12,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:27:12,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:27:12,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:27:12,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 515 transitions, 8614 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:27:12,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:27:12,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:27:12,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:27:15,669 INFO L124 PetriNetUnfolderBase]: 6264/10652 cut-off events. [2024-06-21 21:27:15,670 INFO L125 PetriNetUnfolderBase]: For 405221/405223 co-relation queries the response was YES. [2024-06-21 21:27:15,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68350 conditions, 10652 events. 6264/10652 cut-off events. For 405221/405223 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 80553 event pairs, 2716 based on Foata normal form. 4/10654 useless extension candidates. Maximal degree in co-relation 68224. Up to 9871 conditions per place. [2024-06-21 21:27:15,805 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 497 selfloop transitions, 27 changer transitions 0/529 dead transitions. [2024-06-21 21:27:15,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 529 transitions, 9700 flow [2024-06-21 21:27:15,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:27:15,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:27:15,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-21 21:27:15,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-06-21 21:27:15,807 INFO L175 Difference]: Start difference. First operand has 281 places, 515 transitions, 8614 flow. Second operand 7 states and 114 transitions. [2024-06-21 21:27:15,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 529 transitions, 9700 flow [2024-06-21 21:27:16,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 529 transitions, 9632 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 21:27:16,926 INFO L231 Difference]: Finished difference. Result has 284 places, 515 transitions, 8606 flow [2024-06-21 21:27:16,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8546, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8606, PETRI_PLACES=284, PETRI_TRANSITIONS=515} [2024-06-21 21:27:16,927 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-21 21:27:16,927 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 515 transitions, 8606 flow [2024-06-21 21:27:16,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:27:16,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:27:16,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:27:16,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 21:27:16,927 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:27:16,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:27:16,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1793334771, now seen corresponding path program 1 times [2024-06-21 21:27:16,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:27:16,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908605359] [2024-06-21 21:27:16,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:27:16,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:27:16,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:27:18,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:27:18,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:27:18,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908605359] [2024-06-21 21:27:18,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908605359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:27:18,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:27:18,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:27:18,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095426001] [2024-06-21 21:27:18,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:27:18,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:27:18,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:27:18,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:27:18,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:27:19,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:27:19,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 515 transitions, 8606 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:27:19,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:27:19,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:27:19,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:27:21,919 INFO L124 PetriNetUnfolderBase]: 6334/10733 cut-off events. [2024-06-21 21:27:21,919 INFO L125 PetriNetUnfolderBase]: For 423321/423323 co-relation queries the response was YES. [2024-06-21 21:27:22,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69584 conditions, 10733 events. 6334/10733 cut-off events. For 423321/423323 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 80715 event pairs, 2000 based on Foata normal form. 6/10739 useless extension candidates. Maximal degree in co-relation 69457. Up to 9566 conditions per place. [2024-06-21 21:27:22,077 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 472 selfloop transitions, 88 changer transitions 0/565 dead transitions. [2024-06-21 21:27:22,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 565 transitions, 10416 flow [2024-06-21 21:27:22,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:27:22,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:27:22,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 21:27:22,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-21 21:27:22,079 INFO L175 Difference]: Start difference. First operand has 284 places, 515 transitions, 8606 flow. Second operand 9 states and 169 transitions. [2024-06-21 21:27:22,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 565 transitions, 10416 flow [2024-06-21 21:27:23,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 565 transitions, 10336 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 21:27:23,229 INFO L231 Difference]: Finished difference. Result has 288 places, 528 transitions, 8995 flow [2024-06-21 21:27:23,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8526, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8995, PETRI_PLACES=288, PETRI_TRANSITIONS=528} [2024-06-21 21:27:23,229 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-21 21:27:23,229 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 528 transitions, 8995 flow [2024-06-21 21:27:23,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:27:23,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:27:23,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:27:23,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 21:27:23,230 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:27:23,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:27:23,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1327480213, now seen corresponding path program 2 times [2024-06-21 21:27:23,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:27:23,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821524428] [2024-06-21 21:27:23,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:27:23,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:27:23,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:27:25,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:27:25,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:27:25,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821524428] [2024-06-21 21:27:25,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821524428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:27:25,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:27:25,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:27:25,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949496950] [2024-06-21 21:27:25,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:27:25,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:27:25,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:27:25,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:27:25,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:27:25,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:27:25,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 528 transitions, 8995 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:27:25,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:27:25,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:27:25,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:27:28,524 INFO L124 PetriNetUnfolderBase]: 6354/10761 cut-off events. [2024-06-21 21:27:28,524 INFO L125 PetriNetUnfolderBase]: For 439105/439107 co-relation queries the response was YES. [2024-06-21 21:27:28,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70612 conditions, 10761 events. 6354/10761 cut-off events. For 439105/439107 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 80880 event pairs, 2001 based on Foata normal form. 6/10767 useless extension candidates. Maximal degree in co-relation 70482. Up to 9582 conditions per place. [2024-06-21 21:27:28,665 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 468 selfloop transitions, 93 changer transitions 0/566 dead transitions. [2024-06-21 21:27:28,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 566 transitions, 10635 flow [2024-06-21 21:27:28,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:27:28,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:27:28,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 21:27:28,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 21:27:28,667 INFO L175 Difference]: Start difference. First operand has 288 places, 528 transitions, 8995 flow. Second operand 8 states and 154 transitions. [2024-06-21 21:27:28,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 566 transitions, 10635 flow [2024-06-21 21:27:29,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 566 transitions, 10515 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 21:27:29,871 INFO L231 Difference]: Finished difference. Result has 292 places, 532 transitions, 9152 flow [2024-06-21 21:27:29,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8878, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9152, PETRI_PLACES=292, PETRI_TRANSITIONS=532} [2024-06-21 21:27:29,872 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-21 21:27:29,872 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 532 transitions, 9152 flow [2024-06-21 21:27:29,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:27:29,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:27:29,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:27:29,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 21:27:29,872 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:27:29,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:27:29,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1880263623, now seen corresponding path program 3 times [2024-06-21 21:27:29,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:27:29,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106435000] [2024-06-21 21:27:29,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:27:29,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:27:29,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:27:31,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:27:31,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:27:31,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106435000] [2024-06-21 21:27:31,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106435000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:27:31,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:27:31,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:27:31,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278287889] [2024-06-21 21:27:31,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:27:31,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:27:31,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:27:31,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:27:31,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:27:31,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:27:31,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 532 transitions, 9152 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:27:31,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:27:31,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:27:31,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:27:34,700 INFO L124 PetriNetUnfolderBase]: 6342/10753 cut-off events. [2024-06-21 21:27:34,700 INFO L125 PetriNetUnfolderBase]: For 447445/447451 co-relation queries the response was YES. [2024-06-21 21:27:34,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70565 conditions, 10753 events. 6342/10753 cut-off events. For 447445/447451 co-relation queries the response was YES. Maximal size of possible extension queue 712. Compared 80853 event pairs, 1995 based on Foata normal form. 10/10763 useless extension candidates. Maximal degree in co-relation 70434. Up to 9574 conditions per place. [2024-06-21 21:27:34,839 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 466 selfloop transitions, 90 changer transitions 0/561 dead transitions. [2024-06-21 21:27:34,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 561 transitions, 10582 flow [2024-06-21 21:27:34,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:27:34,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:27:34,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 21:27:34,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 21:27:34,841 INFO L175 Difference]: Start difference. First operand has 292 places, 532 transitions, 9152 flow. Second operand 8 states and 147 transitions. [2024-06-21 21:27:34,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 561 transitions, 10582 flow [2024-06-21 21:27:36,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 561 transitions, 10396 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 21:27:36,070 INFO L231 Difference]: Finished difference. Result has 294 places, 532 transitions, 9161 flow [2024-06-21 21:27:36,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8970, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9161, PETRI_PLACES=294, PETRI_TRANSITIONS=532} [2024-06-21 21:27:36,073 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-21 21:27:36,073 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 532 transitions, 9161 flow [2024-06-21 21:27:36,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:27:36,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:27:36,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:27:36,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 21:27:36,073 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:27:36,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:27:36,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1894554375, now seen corresponding path program 1 times [2024-06-21 21:27:36,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:27:36,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506204705] [2024-06-21 21:27:36,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:27:36,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:27:36,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:27:38,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:27:38,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:27:38,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506204705] [2024-06-21 21:27:38,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506204705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:27:38,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:27:38,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:27:38,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735575007] [2024-06-21 21:27:38,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:27:38,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:27:38,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:27:38,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:27:38,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:27:38,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:27:38,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 532 transitions, 9161 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:27:38,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:27:38,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:27:38,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:27:41,304 INFO L124 PetriNetUnfolderBase]: 5958/10257 cut-off events. [2024-06-21 21:27:41,305 INFO L125 PetriNetUnfolderBase]: For 456108/456194 co-relation queries the response was YES. [2024-06-21 21:27:41,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67513 conditions, 10257 events. 5958/10257 cut-off events. For 456108/456194 co-relation queries the response was YES. Maximal size of possible extension queue 709. Compared 79006 event pairs, 2148 based on Foata normal form. 61/10204 useless extension candidates. Maximal degree in co-relation 67382. Up to 9243 conditions per place. [2024-06-21 21:27:41,450 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 487 selfloop transitions, 24 changer transitions 0/564 dead transitions. [2024-06-21 21:27:41,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 564 transitions, 10335 flow [2024-06-21 21:27:41,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:27:41,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:27:41,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 21:27:41,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-21 21:27:41,452 INFO L175 Difference]: Start difference. First operand has 294 places, 532 transitions, 9161 flow. Second operand 9 states and 154 transitions. [2024-06-21 21:27:41,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 564 transitions, 10335 flow [2024-06-21 21:27:42,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 564 transitions, 10176 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 21:27:42,803 INFO L231 Difference]: Finished difference. Result has 298 places, 537 transitions, 9139 flow [2024-06-21 21:27:42,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9002, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9139, PETRI_PLACES=298, PETRI_TRANSITIONS=537} [2024-06-21 21:27:42,804 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 255 predicate places. [2024-06-21 21:27:42,804 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 537 transitions, 9139 flow [2024-06-21 21:27:42,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:27:42,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:27:42,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:27:42,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 21:27:42,805 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:27:42,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:27:42,806 INFO L85 PathProgramCache]: Analyzing trace with hash -961165557, now seen corresponding path program 4 times [2024-06-21 21:27:42,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:27:42,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61381072] [2024-06-21 21:27:42,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:27:42,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:27:42,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:27:45,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:27:45,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:27:45,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61381072] [2024-06-21 21:27:45,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61381072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:27:45,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:27:45,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:27:45,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267290923] [2024-06-21 21:27:45,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:27:45,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:27:45,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:27:45,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:27:45,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:27:45,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:27:45,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 537 transitions, 9139 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:27:45,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:27:45,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:27:45,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:27:48,044 INFO L124 PetriNetUnfolderBase]: 6377/10792 cut-off events. [2024-06-21 21:27:48,044 INFO L125 PetriNetUnfolderBase]: For 462717/462719 co-relation queries the response was YES. [2024-06-21 21:27:48,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70971 conditions, 10792 events. 6377/10792 cut-off events. For 462717/462719 co-relation queries the response was YES. Maximal size of possible extension queue 710. Compared 80983 event pairs, 1999 based on Foata normal form. 10/10802 useless extension candidates. Maximal degree in co-relation 70838. Up to 9593 conditions per place. [2024-06-21 21:27:48,191 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 452 selfloop transitions, 119 changer transitions 0/576 dead transitions. [2024-06-21 21:27:48,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 576 transitions, 10811 flow [2024-06-21 21:27:48,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:27:48,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:27:48,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 21:27:48,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-21 21:27:48,193 INFO L175 Difference]: Start difference. First operand has 298 places, 537 transitions, 9139 flow. Second operand 9 states and 156 transitions. [2024-06-21 21:27:48,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 576 transitions, 10811 flow [2024-06-21 21:27:49,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 576 transitions, 10730 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 21:27:49,592 INFO L231 Difference]: Finished difference. Result has 302 places, 547 transitions, 9500 flow [2024-06-21 21:27:49,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9058, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9500, PETRI_PLACES=302, PETRI_TRANSITIONS=547} [2024-06-21 21:27:49,592 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-21 21:27:49,593 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 547 transitions, 9500 flow [2024-06-21 21:27:49,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:27:49,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:27:49,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:27:49,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 21:27:49,593 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:27:49,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:27:49,594 INFO L85 PathProgramCache]: Analyzing trace with hash 839944435, now seen corresponding path program 5 times [2024-06-21 21:27:49,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:27:49,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276781064] [2024-06-21 21:27:49,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:27:49,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:27:49,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:27:52,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:27:52,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:27:52,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276781064] [2024-06-21 21:27:52,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276781064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:27:52,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:27:52,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:27:52,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054916206] [2024-06-21 21:27:52,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:27:52,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:27:52,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:27:52,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:27:52,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:27:52,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:27:52,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 547 transitions, 9500 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:27:52,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:27:52,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:27:52,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:27:54,645 INFO L124 PetriNetUnfolderBase]: 6365/10782 cut-off events. [2024-06-21 21:27:54,645 INFO L125 PetriNetUnfolderBase]: For 464479/464485 co-relation queries the response was YES. [2024-06-21 21:27:54,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71355 conditions, 10782 events. 6365/10782 cut-off events. For 464479/464485 co-relation queries the response was YES. Maximal size of possible extension queue 709. Compared 81055 event pairs, 1988 based on Foata normal form. 10/10792 useless extension candidates. Maximal degree in co-relation 71220. Up to 9585 conditions per place. [2024-06-21 21:27:55,023 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 462 selfloop transitions, 101 changer transitions 0/568 dead transitions. [2024-06-21 21:27:55,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 568 transitions, 10816 flow [2024-06-21 21:27:55,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:27:55,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:27:55,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 21:27:55,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-21 21:27:55,025 INFO L175 Difference]: Start difference. First operand has 302 places, 547 transitions, 9500 flow. Second operand 7 states and 124 transitions. [2024-06-21 21:27:55,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 568 transitions, 10816 flow [2024-06-21 21:27:56,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 568 transitions, 10585 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-21 21:27:56,353 INFO L231 Difference]: Finished difference. Result has 303 places, 547 transitions, 9492 flow [2024-06-21 21:27:56,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9271, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9492, PETRI_PLACES=303, PETRI_TRANSITIONS=547} [2024-06-21 21:27:56,353 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-21 21:27:56,353 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 547 transitions, 9492 flow [2024-06-21 21:27:56,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:27:56,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:27:56,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:27:56,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 21:27:56,354 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:27:56,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:27:56,355 INFO L85 PathProgramCache]: Analyzing trace with hash -954490389, now seen corresponding path program 2 times [2024-06-21 21:27:56,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:27:56,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842056005] [2024-06-21 21:27:56,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:27:56,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:27:56,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:27:59,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:27:59,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:27:59,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842056005] [2024-06-21 21:27:59,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842056005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:27:59,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:27:59,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:27:59,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138751458] [2024-06-21 21:27:59,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:27:59,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:27:59,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:27:59,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:27:59,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:27:59,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:27:59,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 547 transitions, 9492 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:27:59,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:27:59,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:27:59,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:28:02,093 INFO L124 PetriNetUnfolderBase]: 5989/10304 cut-off events. [2024-06-21 21:28:02,093 INFO L125 PetriNetUnfolderBase]: For 478027/478113 co-relation queries the response was YES. [2024-06-21 21:28:02,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68473 conditions, 10304 events. 5989/10304 cut-off events. For 478027/478113 co-relation queries the response was YES. Maximal size of possible extension queue 708. Compared 79333 event pairs, 2148 based on Foata normal form. 61/10251 useless extension candidates. Maximal degree in co-relation 68338. Up to 9274 conditions per place. [2024-06-21 21:28:02,234 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 487 selfloop transitions, 26 changer transitions 0/569 dead transitions. [2024-06-21 21:28:02,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 569 transitions, 10642 flow [2024-06-21 21:28:02,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:28:02,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:28:02,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 21:28:02,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-21 21:28:02,236 INFO L175 Difference]: Start difference. First operand has 303 places, 547 transitions, 9492 flow. Second operand 7 states and 122 transitions. [2024-06-21 21:28:02,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 569 transitions, 10642 flow [2024-06-21 21:28:03,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 569 transitions, 10429 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 21:28:03,448 INFO L231 Difference]: Finished difference. Result has 303 places, 549 transitions, 9401 flow [2024-06-21 21:28:03,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9279, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9401, PETRI_PLACES=303, PETRI_TRANSITIONS=549} [2024-06-21 21:28:03,449 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-21 21:28:03,449 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 549 transitions, 9401 flow [2024-06-21 21:28:03,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:28:03,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:28:03,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:28:03,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 21:28:03,450 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:28:03,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:28:03,450 INFO L85 PathProgramCache]: Analyzing trace with hash 913325641, now seen corresponding path program 6 times [2024-06-21 21:28:03,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:28:03,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351592993] [2024-06-21 21:28:03,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:28:03,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:28:03,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:28:05,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:28:05,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:28:05,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351592993] [2024-06-21 21:28:05,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351592993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:28:05,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:28:05,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:28:05,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161516425] [2024-06-21 21:28:05,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:28:05,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:28:05,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:28:05,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:28:05,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:28:05,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:28:05,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 549 transitions, 9401 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:28:05,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:28:05,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:28:05,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:28:08,731 INFO L124 PetriNetUnfolderBase]: 6353/10759 cut-off events. [2024-06-21 21:28:08,731 INFO L125 PetriNetUnfolderBase]: For 455638/455640 co-relation queries the response was YES. [2024-06-21 21:28:08,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70606 conditions, 10759 events. 6353/10759 cut-off events. For 455638/455640 co-relation queries the response was YES. Maximal size of possible extension queue 707. Compared 80698 event pairs, 2025 based on Foata normal form. 4/10763 useless extension candidates. Maximal degree in co-relation 70471. Up to 9805 conditions per place. [2024-06-21 21:28:08,853 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 495 selfloop transitions, 69 changer transitions 0/569 dead transitions. [2024-06-21 21:28:08,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 569 transitions, 10622 flow [2024-06-21 21:28:08,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:28:08,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:28:08,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 21:28:08,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-21 21:28:08,855 INFO L175 Difference]: Start difference. First operand has 303 places, 549 transitions, 9401 flow. Second operand 7 states and 121 transitions. [2024-06-21 21:28:08,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 569 transitions, 10622 flow [2024-06-21 21:28:10,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 569 transitions, 10494 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-21 21:28:10,034 INFO L231 Difference]: Finished difference. Result has 305 places, 549 transitions, 9421 flow [2024-06-21 21:28:10,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9273, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9421, PETRI_PLACES=305, PETRI_TRANSITIONS=549} [2024-06-21 21:28:10,035 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-21 21:28:10,035 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 549 transitions, 9421 flow [2024-06-21 21:28:10,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:28:10,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:28:10,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:28:10,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 21:28:10,035 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:28:10,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:28:10,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1541175379, now seen corresponding path program 7 times [2024-06-21 21:28:10,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:28:10,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587002313] [2024-06-21 21:28:10,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:28:10,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:28:10,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:28:12,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:28:12,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:28:12,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587002313] [2024-06-21 21:28:12,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587002313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:28:12,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:28:12,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:28:12,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925453133] [2024-06-21 21:28:12,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:28:12,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:28:12,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:28:12,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:28:12,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:28:12,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:28:12,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 549 transitions, 9421 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:28:12,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:28:12,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:28:12,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:28:15,193 INFO L124 PetriNetUnfolderBase]: 6363/10756 cut-off events. [2024-06-21 21:28:15,194 INFO L125 PetriNetUnfolderBase]: For 465973/465975 co-relation queries the response was YES. [2024-06-21 21:28:15,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70986 conditions, 10756 events. 6363/10756 cut-off events. For 465973/465975 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 80505 event pairs, 2037 based on Foata normal form. 2/10757 useless extension candidates. Maximal degree in co-relation 70850. Up to 9510 conditions per place. [2024-06-21 21:28:15,344 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 436 selfloop transitions, 131 changer transitions 0/572 dead transitions. [2024-06-21 21:28:15,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 572 transitions, 10787 flow [2024-06-21 21:28:15,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:28:15,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:28:15,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 21:28:15,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-21 21:28:15,346 INFO L175 Difference]: Start difference. First operand has 305 places, 549 transitions, 9421 flow. Second operand 7 states and 125 transitions. [2024-06-21 21:28:15,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 572 transitions, 10787 flow [2024-06-21 21:28:16,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 572 transitions, 10544 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 21:28:16,426 INFO L231 Difference]: Finished difference. Result has 305 places, 552 transitions, 9486 flow [2024-06-21 21:28:16,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9178, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9486, PETRI_PLACES=305, PETRI_TRANSITIONS=552} [2024-06-21 21:28:16,427 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-21 21:28:16,427 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 552 transitions, 9486 flow [2024-06-21 21:28:16,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:28:16,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:28:16,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:28:16,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 21:28:16,427 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:28:16,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:28:16,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1858978961, now seen corresponding path program 8 times [2024-06-21 21:28:16,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:28:16,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568050555] [2024-06-21 21:28:16,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:28:16,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:28:16,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:28:18,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:28:18,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:28:18,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568050555] [2024-06-21 21:28:18,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568050555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:28:18,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:28:18,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:28:18,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630433161] [2024-06-21 21:28:18,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:28:18,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:28:18,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:28:18,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:28:18,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:28:18,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:28:18,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 552 transitions, 9486 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:28:18,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:28:18,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:28:18,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:28:21,669 INFO L124 PetriNetUnfolderBase]: 6367/10781 cut-off events. [2024-06-21 21:28:21,670 INFO L125 PetriNetUnfolderBase]: For 477469/477487 co-relation queries the response was YES. [2024-06-21 21:28:21,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71337 conditions, 10781 events. 6367/10781 cut-off events. For 477469/477487 co-relation queries the response was YES. Maximal size of possible extension queue 707. Compared 80947 event pairs, 2003 based on Foata normal form. 14/10794 useless extension candidates. Maximal degree in co-relation 71200. Up to 9511 conditions per place. [2024-06-21 21:28:21,788 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 456 selfloop transitions, 109 changer transitions 0/570 dead transitions. [2024-06-21 21:28:21,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 570 transitions, 10834 flow [2024-06-21 21:28:21,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:28:21,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:28:21,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 21:28:21,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-21 21:28:21,790 INFO L175 Difference]: Start difference. First operand has 305 places, 552 transitions, 9486 flow. Second operand 7 states and 120 transitions. [2024-06-21 21:28:21,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 570 transitions, 10834 flow [2024-06-21 21:28:22,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 570 transitions, 10613 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 21:28:22,841 INFO L231 Difference]: Finished difference. Result has 308 places, 555 transitions, 9539 flow [2024-06-21 21:28:22,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9268, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9539, PETRI_PLACES=308, PETRI_TRANSITIONS=555} [2024-06-21 21:28:22,844 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-21 21:28:22,844 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 555 transitions, 9539 flow [2024-06-21 21:28:22,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:28:22,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:28:22,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:28:22,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 21:28:22,845 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:28:22,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:28:22,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1313274229, now seen corresponding path program 9 times [2024-06-21 21:28:22,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:28:22,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118774010] [2024-06-21 21:28:22,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:28:22,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:28:22,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:28:24,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:28:24,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:28:24,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118774010] [2024-06-21 21:28:24,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118774010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:28:24,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:28:24,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:28:24,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717330426] [2024-06-21 21:28:24,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:28:24,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:28:24,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:28:24,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:28:24,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:28:24,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:28:24,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 555 transitions, 9539 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:28:24,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:28:25,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:28:25,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:28:27,801 INFO L124 PetriNetUnfolderBase]: 6357/10765 cut-off events. [2024-06-21 21:28:27,801 INFO L125 PetriNetUnfolderBase]: For 482068/482086 co-relation queries the response was YES. [2024-06-21 21:28:27,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71276 conditions, 10765 events. 6357/10765 cut-off events. For 482068/482086 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 80739 event pairs, 2003 based on Foata normal form. 12/10776 useless extension candidates. Maximal degree in co-relation 71138. Up to 9503 conditions per place. [2024-06-21 21:28:27,952 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 444 selfloop transitions, 120 changer transitions 0/569 dead transitions. [2024-06-21 21:28:27,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 569 transitions, 10713 flow [2024-06-21 21:28:27,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:28:27,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:28:27,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 21:28:27,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-21 21:28:27,954 INFO L175 Difference]: Start difference. First operand has 308 places, 555 transitions, 9539 flow. Second operand 7 states and 118 transitions. [2024-06-21 21:28:27,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 569 transitions, 10713 flow [2024-06-21 21:28:29,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 569 transitions, 10467 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 21:28:29,138 INFO L231 Difference]: Finished difference. Result has 311 places, 555 transitions, 9539 flow [2024-06-21 21:28:29,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9293, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9539, PETRI_PLACES=311, PETRI_TRANSITIONS=555} [2024-06-21 21:28:29,139 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-21 21:28:29,139 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 555 transitions, 9539 flow [2024-06-21 21:28:29,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:28:29,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:28:29,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:28:29,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 21:28:29,140 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:28:29,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:28:29,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1305169651, now seen corresponding path program 3 times [2024-06-21 21:28:29,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:28:29,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334692260] [2024-06-21 21:28:29,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:28:29,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:28:29,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:28:32,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:28:32,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:28:32,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334692260] [2024-06-21 21:28:32,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334692260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:28:32,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:28:32,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:28:32,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543419580] [2024-06-21 21:28:32,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:28:32,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:28:32,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:28:32,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:28:32,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:28:32,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:28:32,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 555 transitions, 9539 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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) [2024-06-21 21:28:32,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:28:32,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:28:32,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:28:35,014 INFO L124 PetriNetUnfolderBase]: 5985/10303 cut-off events. [2024-06-21 21:28:35,014 INFO L125 PetriNetUnfolderBase]: For 514344/514433 co-relation queries the response was YES. [2024-06-21 21:28:35,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68758 conditions, 10303 events. 5985/10303 cut-off events. For 514344/514433 co-relation queries the response was YES. Maximal size of possible extension queue 705. Compared 79260 event pairs, 2138 based on Foata normal form. 66/10266 useless extension candidates. Maximal degree in co-relation 68619. Up to 9262 conditions per place. [2024-06-21 21:28:35,146 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 485 selfloop transitions, 28 changer transitions 0/571 dead transitions. [2024-06-21 21:28:35,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 571 transitions, 10671 flow [2024-06-21 21:28:35,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:28:35,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:28:35,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 21:28:35,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-21 21:28:35,148 INFO L175 Difference]: Start difference. First operand has 311 places, 555 transitions, 9539 flow. Second operand 7 states and 117 transitions. [2024-06-21 21:28:35,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 571 transitions, 10671 flow [2024-06-21 21:28:36,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 571 transitions, 10336 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 21:28:36,342 INFO L231 Difference]: Finished difference. Result has 310 places, 557 transitions, 9331 flow [2024-06-21 21:28:36,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9204, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9331, PETRI_PLACES=310, PETRI_TRANSITIONS=557} [2024-06-21 21:28:36,342 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-21 21:28:36,342 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 557 transitions, 9331 flow [2024-06-21 21:28:36,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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) [2024-06-21 21:28:36,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:28:36,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:28:36,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 21:28:36,343 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:28:36,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:28:36,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1249392343, now seen corresponding path program 4 times [2024-06-21 21:28:36,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:28:36,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491064460] [2024-06-21 21:28:36,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:28:36,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:28:36,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:28:39,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:28:39,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:28:39,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491064460] [2024-06-21 21:28:39,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491064460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:28:39,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:28:39,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:28:39,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049223829] [2024-06-21 21:28:39,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:28:39,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:28:39,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:28:39,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:28:39,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:28:39,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:28:39,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 557 transitions, 9331 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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) [2024-06-21 21:28:39,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:28:39,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:28:39,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:28:41,852 INFO L124 PetriNetUnfolderBase]: 5980/10296 cut-off events. [2024-06-21 21:28:41,852 INFO L125 PetriNetUnfolderBase]: For 521054/521143 co-relation queries the response was YES. [2024-06-21 21:28:41,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68340 conditions, 10296 events. 5980/10296 cut-off events. For 521054/521143 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 79194 event pairs, 2134 based on Foata normal form. 66/10259 useless extension candidates. Maximal degree in co-relation 68200. Up to 9229 conditions per place. [2024-06-21 21:28:42,005 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 480 selfloop transitions, 35 changer transitions 0/573 dead transitions. [2024-06-21 21:28:42,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 573 transitions, 10469 flow [2024-06-21 21:28:42,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:28:42,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:28:42,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 21:28:42,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-21 21:28:42,007 INFO L175 Difference]: Start difference. First operand has 310 places, 557 transitions, 9331 flow. Second operand 7 states and 117 transitions. [2024-06-21 21:28:42,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 573 transitions, 10469 flow [2024-06-21 21:28:43,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 573 transitions, 10358 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 21:28:43,248 INFO L231 Difference]: Finished difference. Result has 312 places, 559 transitions, 9365 flow [2024-06-21 21:28:43,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9220, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9365, PETRI_PLACES=312, PETRI_TRANSITIONS=559} [2024-06-21 21:28:43,248 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-21 21:28:43,249 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 559 transitions, 9365 flow [2024-06-21 21:28:43,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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) [2024-06-21 21:28:43,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:28:43,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:28:43,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 21:28:43,249 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:28:43,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:28:43,249 INFO L85 PathProgramCache]: Analyzing trace with hash 920952137, now seen corresponding path program 1 times [2024-06-21 21:28:43,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:28:43,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958424462] [2024-06-21 21:28:43,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:28:43,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:28:43,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:28:45,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:28:45,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:28:45,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958424462] [2024-06-21 21:28:45,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958424462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:28:45,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:28:45,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:28:45,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580972296] [2024-06-21 21:28:45,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:28:45,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:28:45,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:28:45,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:28:45,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:28:45,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:28:45,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 559 transitions, 9365 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:28:45,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:28:45,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:28:45,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:28:48,709 INFO L124 PetriNetUnfolderBase]: 6370/10792 cut-off events. [2024-06-21 21:28:48,709 INFO L125 PetriNetUnfolderBase]: For 516665/516665 co-relation queries the response was YES. [2024-06-21 21:28:48,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71403 conditions, 10792 events. 6370/10792 cut-off events. For 516665/516665 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 81423 event pairs, 2735 based on Foata normal form. 2/10788 useless extension candidates. Maximal degree in co-relation 71262. Up to 10048 conditions per place. [2024-06-21 21:28:48,851 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 564 selfloop transitions, 18 changer transitions 0/587 dead transitions. [2024-06-21 21:28:48,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 587 transitions, 10661 flow [2024-06-21 21:28:48,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:28:48,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:28:48,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 21:28:48,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 21:28:48,853 INFO L175 Difference]: Start difference. First operand has 312 places, 559 transitions, 9365 flow. Second operand 8 states and 132 transitions. [2024-06-21 21:28:48,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 587 transitions, 10661 flow [2024-06-21 21:28:50,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 587 transitions, 10532 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 21:28:50,092 INFO L231 Difference]: Finished difference. Result has 315 places, 562 transitions, 9322 flow [2024-06-21 21:28:50,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9236, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9322, PETRI_PLACES=315, PETRI_TRANSITIONS=562} [2024-06-21 21:28:50,092 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-21 21:28:50,093 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 562 transitions, 9322 flow [2024-06-21 21:28:50,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:28:50,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:28:50,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:28:50,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 21:28:50,093 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:28:50,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:28:50,093 INFO L85 PathProgramCache]: Analyzing trace with hash 921072107, now seen corresponding path program 2 times [2024-06-21 21:28:50,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:28:50,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210099674] [2024-06-21 21:28:50,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:28:50,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:28:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:28:52,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:28:52,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:28:52,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210099674] [2024-06-21 21:28:52,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210099674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:28:52,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:28:52,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:28:52,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503018461] [2024-06-21 21:28:52,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:28:52,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:28:52,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:28:52,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:28:52,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:28:52,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:28:52,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 562 transitions, 9322 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:28:52,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:28:52,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:28:52,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:28:55,382 INFO L124 PetriNetUnfolderBase]: 6380/10808 cut-off events. [2024-06-21 21:28:55,383 INFO L125 PetriNetUnfolderBase]: For 528111/528111 co-relation queries the response was YES. [2024-06-21 21:28:55,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72123 conditions, 10808 events. 6380/10808 cut-off events. For 528111/528111 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 81452 event pairs, 2714 based on Foata normal form. 2/10804 useless extension candidates. Maximal degree in co-relation 71981. Up to 9997 conditions per place. [2024-06-21 21:28:55,538 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 552 selfloop transitions, 37 changer transitions 0/594 dead transitions. [2024-06-21 21:28:55,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 594 transitions, 10816 flow [2024-06-21 21:28:55,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:28:55,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:28:55,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 21:28:55,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 21:28:55,539 INFO L175 Difference]: Start difference. First operand has 315 places, 562 transitions, 9322 flow. Second operand 8 states and 138 transitions. [2024-06-21 21:28:55,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 594 transitions, 10816 flow [2024-06-21 21:28:56,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 594 transitions, 10752 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 21:28:56,969 INFO L231 Difference]: Finished difference. Result has 317 places, 568 transitions, 9432 flow [2024-06-21 21:28:56,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9258, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9432, PETRI_PLACES=317, PETRI_TRANSITIONS=568} [2024-06-21 21:28:56,970 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-21 21:28:56,970 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 568 transitions, 9432 flow [2024-06-21 21:28:56,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:28:56,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:28:56,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:28:56,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 21:28:56,971 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:28:56,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:28:56,971 INFO L85 PathProgramCache]: Analyzing trace with hash 925713737, now seen corresponding path program 3 times [2024-06-21 21:28:56,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:28:56,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500440430] [2024-06-21 21:28:56,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:28:56,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:28:56,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:28:59,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:28:59,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:28:59,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500440430] [2024-06-21 21:28:59,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500440430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:28:59,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:28:59,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:28:59,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125062141] [2024-06-21 21:28:59,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:28:59,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:28:59,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:28:59,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:28:59,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:28:59,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:28:59,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 568 transitions, 9432 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:28:59,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:28:59,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:28:59,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:02,431 INFO L124 PetriNetUnfolderBase]: 6390/10826 cut-off events. [2024-06-21 21:29:02,432 INFO L125 PetriNetUnfolderBase]: For 543959/543959 co-relation queries the response was YES. [2024-06-21 21:29:02,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73037 conditions, 10826 events. 6390/10826 cut-off events. For 543959/543959 co-relation queries the response was YES. Maximal size of possible extension queue 717. Compared 81679 event pairs, 2716 based on Foata normal form. 2/10822 useless extension candidates. Maximal degree in co-relation 72894. Up to 10007 conditions per place. [2024-06-21 21:29:02,560 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 549 selfloop transitions, 39 changer transitions 0/593 dead transitions. [2024-06-21 21:29:02,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 593 transitions, 10870 flow [2024-06-21 21:29:02,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:29:02,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:29:02,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 21:29:02,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 21:29:02,562 INFO L175 Difference]: Start difference. First operand has 317 places, 568 transitions, 9432 flow. Second operand 8 states and 135 transitions. [2024-06-21 21:29:02,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 593 transitions, 10870 flow [2024-06-21 21:29:03,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 593 transitions, 10785 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-21 21:29:03,853 INFO L231 Difference]: Finished difference. Result has 321 places, 571 transitions, 9481 flow [2024-06-21 21:29:03,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9357, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9481, PETRI_PLACES=321, PETRI_TRANSITIONS=571} [2024-06-21 21:29:03,854 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-21 21:29:03,854 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 571 transitions, 9481 flow [2024-06-21 21:29:03,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:03,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:03,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:03,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 21:29:03,854 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:29:03,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:03,855 INFO L85 PathProgramCache]: Analyzing trace with hash 925720681, now seen corresponding path program 1 times [2024-06-21 21:29:03,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:03,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024718189] [2024-06-21 21:29:03,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:03,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:03,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:06,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:06,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:06,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024718189] [2024-06-21 21:29:06,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024718189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:06,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:06,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:29:06,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744618240] [2024-06-21 21:29:06,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:06,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:29:06,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:06,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:29:06,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:29:06,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:29:06,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 571 transitions, 9481 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:06,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:06,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:29:06,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:09,117 INFO L124 PetriNetUnfolderBase]: 6398/10838 cut-off events. [2024-06-21 21:29:09,117 INFO L125 PetriNetUnfolderBase]: For 556922/556922 co-relation queries the response was YES. [2024-06-21 21:29:09,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73364 conditions, 10838 events. 6398/10838 cut-off events. For 556922/556922 co-relation queries the response was YES. Maximal size of possible extension queue 718. Compared 81747 event pairs, 2720 based on Foata normal form. 2/10834 useless extension candidates. Maximal degree in co-relation 73219. Up to 10090 conditions per place. [2024-06-21 21:29:09,267 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 568 selfloop transitions, 19 changer transitions 0/592 dead transitions. [2024-06-21 21:29:09,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 592 transitions, 10759 flow [2024-06-21 21:29:09,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:29:09,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:29:09,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 21:29:09,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-21 21:29:09,268 INFO L175 Difference]: Start difference. First operand has 321 places, 571 transitions, 9481 flow. Second operand 7 states and 116 transitions. [2024-06-21 21:29:09,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 592 transitions, 10759 flow [2024-06-21 21:29:10,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 592 transitions, 10673 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 21:29:10,894 INFO L231 Difference]: Finished difference. Result has 323 places, 573 transitions, 9480 flow [2024-06-21 21:29:10,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9395, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9480, PETRI_PLACES=323, PETRI_TRANSITIONS=573} [2024-06-21 21:29:10,895 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 280 predicate places. [2024-06-21 21:29:10,895 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 573 transitions, 9480 flow [2024-06-21 21:29:10,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:10,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:10,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:10,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 21:29:10,895 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:29:10,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:10,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1859431871, now seen corresponding path program 2 times [2024-06-21 21:29:10,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:10,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278625919] [2024-06-21 21:29:10,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:10,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:10,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:13,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:13,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:13,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278625919] [2024-06-21 21:29:13,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278625919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:13,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:13,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:29:13,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663111246] [2024-06-21 21:29:13,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:13,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:29:13,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:13,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:29:13,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:29:13,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:29:13,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 573 transitions, 9480 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:13,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:13,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:29:13,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:16,579 INFO L124 PetriNetUnfolderBase]: 6406/10851 cut-off events. [2024-06-21 21:29:16,579 INFO L125 PetriNetUnfolderBase]: For 571184/571186 co-relation queries the response was YES. [2024-06-21 21:29:16,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73677 conditions, 10851 events. 6406/10851 cut-off events. For 571184/571186 co-relation queries the response was YES. Maximal size of possible extension queue 719. Compared 81935 event pairs, 2721 based on Foata normal form. 4/10849 useless extension candidates. Maximal degree in co-relation 73531. Up to 10102 conditions per place. [2024-06-21 21:29:16,714 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 565 selfloop transitions, 19 changer transitions 0/589 dead transitions. [2024-06-21 21:29:16,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 589 transitions, 10734 flow [2024-06-21 21:29:16,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:29:16,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:29:16,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-21 21:29:16,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-21 21:29:16,716 INFO L175 Difference]: Start difference. First operand has 323 places, 573 transitions, 9480 flow. Second operand 7 states and 111 transitions. [2024-06-21 21:29:16,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 589 transitions, 10734 flow [2024-06-21 21:29:18,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 589 transitions, 10665 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 21:29:18,414 INFO L231 Difference]: Finished difference. Result has 325 places, 575 transitions, 9500 flow [2024-06-21 21:29:18,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9411, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9500, PETRI_PLACES=325, PETRI_TRANSITIONS=575} [2024-06-21 21:29:18,415 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-21 21:29:18,415 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 575 transitions, 9500 flow [2024-06-21 21:29:18,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:18,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:18,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:18,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 21:29:18,415 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:29:18,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:18,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1313266293, now seen corresponding path program 4 times [2024-06-21 21:29:18,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:18,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814682600] [2024-06-21 21:29:18,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:18,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:18,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:20,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:20,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:20,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814682600] [2024-06-21 21:29:20,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814682600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:20,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:20,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:29:20,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800859726] [2024-06-21 21:29:20,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:20,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:29:20,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:20,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:29:20,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:29:20,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:29:20,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 575 transitions, 9500 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:20,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:20,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:29:20,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:23,923 INFO L124 PetriNetUnfolderBase]: 6400/10843 cut-off events. [2024-06-21 21:29:23,923 INFO L125 PetriNetUnfolderBase]: For 580112/580112 co-relation queries the response was YES. [2024-06-21 21:29:24,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73736 conditions, 10843 events. 6400/10843 cut-off events. For 580112/580112 co-relation queries the response was YES. Maximal size of possible extension queue 718. Compared 81768 event pairs, 2729 based on Foata normal form. 2/10838 useless extension candidates. Maximal degree in co-relation 73589. Up to 10026 conditions per place. [2024-06-21 21:29:24,090 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 547 selfloop transitions, 39 changer transitions 0/591 dead transitions. [2024-06-21 21:29:24,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 591 transitions, 10724 flow [2024-06-21 21:29:24,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:29:24,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:29:24,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 21:29:24,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-21 21:29:24,092 INFO L175 Difference]: Start difference. First operand has 325 places, 575 transitions, 9500 flow. Second operand 8 states and 129 transitions. [2024-06-21 21:29:24,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 591 transitions, 10724 flow [2024-06-21 21:29:25,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 591 transitions, 10633 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 21:29:25,822 INFO L231 Difference]: Finished difference. Result has 328 places, 575 transitions, 9493 flow [2024-06-21 21:29:25,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9409, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9493, PETRI_PLACES=328, PETRI_TRANSITIONS=575} [2024-06-21 21:29:25,822 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-21 21:29:25,823 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 575 transitions, 9493 flow [2024-06-21 21:29:25,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:25,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:25,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:25,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 21:29:25,823 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:29:25,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:25,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1304688469, now seen corresponding path program 3 times [2024-06-21 21:29:25,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:25,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061943664] [2024-06-21 21:29:25,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:25,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:28,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:28,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:28,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061943664] [2024-06-21 21:29:28,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061943664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:28,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:28,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:29:28,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718214749] [2024-06-21 21:29:28,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:28,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:29:28,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:28,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:29:28,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:29:28,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:29:28,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 575 transitions, 9493 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:28,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:28,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:29:28,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:31,199 INFO L124 PetriNetUnfolderBase]: 6395/10836 cut-off events. [2024-06-21 21:29:31,199 INFO L125 PetriNetUnfolderBase]: For 587739/587741 co-relation queries the response was YES. [2024-06-21 21:29:31,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73695 conditions, 10836 events. 6395/10836 cut-off events. For 587739/587741 co-relation queries the response was YES. Maximal size of possible extension queue 717. Compared 81786 event pairs, 2718 based on Foata normal form. 4/10834 useless extension candidates. Maximal degree in co-relation 73547. Up to 10067 conditions per place. [2024-06-21 21:29:31,328 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 562 selfloop transitions, 24 changer transitions 0/591 dead transitions. [2024-06-21 21:29:31,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 591 transitions, 10753 flow [2024-06-21 21:29:31,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:29:31,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:29:31,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-21 21:29:31,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-21 21:29:31,329 INFO L175 Difference]: Start difference. First operand has 328 places, 575 transitions, 9493 flow. Second operand 7 states and 111 transitions. [2024-06-21 21:29:31,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 591 transitions, 10753 flow [2024-06-21 21:29:32,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 591 transitions, 10635 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 21:29:32,960 INFO L231 Difference]: Finished difference. Result has 327 places, 577 transitions, 9478 flow [2024-06-21 21:29:32,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9375, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9478, PETRI_PLACES=327, PETRI_TRANSITIONS=577} [2024-06-21 21:29:32,961 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 284 predicate places. [2024-06-21 21:29:32,961 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 577 transitions, 9478 flow [2024-06-21 21:29:32,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:32,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:32,961 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] [2024-06-21 21:29:32,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 21:29:32,961 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:29:32,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:32,962 INFO L85 PathProgramCache]: Analyzing trace with hash 992063398, now seen corresponding path program 1 times [2024-06-21 21:29:32,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:32,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681769438] [2024-06-21 21:29:32,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:32,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:32,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:35,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:35,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:35,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681769438] [2024-06-21 21:29:35,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681769438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:35,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:35,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:29:35,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406707870] [2024-06-21 21:29:35,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:35,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:29:35,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:35,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:29:35,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:29:35,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:29:35,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 577 transitions, 9478 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:35,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:35,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:29:35,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:38,234 INFO L124 PetriNetUnfolderBase]: 6745/11391 cut-off events. [2024-06-21 21:29:38,235 INFO L125 PetriNetUnfolderBase]: For 779392/779406 co-relation queries the response was YES. [2024-06-21 21:29:38,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79749 conditions, 11391 events. 6745/11391 cut-off events. For 779392/779406 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 86222 event pairs, 2158 based on Foata normal form. 46/11435 useless extension candidates. Maximal degree in co-relation 79600. Up to 9703 conditions per place. [2024-06-21 21:29:38,400 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 511 selfloop transitions, 124 changer transitions 0/640 dead transitions. [2024-06-21 21:29:38,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 640 transitions, 11312 flow [2024-06-21 21:29:38,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:29:38,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:29:38,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 21:29:38,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-21 21:29:38,402 INFO L175 Difference]: Start difference. First operand has 327 places, 577 transitions, 9478 flow. Second operand 9 states and 179 transitions. [2024-06-21 21:29:38,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 640 transitions, 11312 flow [2024-06-21 21:29:40,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 640 transitions, 11225 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 21:29:40,511 INFO L231 Difference]: Finished difference. Result has 332 places, 589 transitions, 9890 flow [2024-06-21 21:29:40,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9391, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9890, PETRI_PLACES=332, PETRI_TRANSITIONS=589} [2024-06-21 21:29:40,512 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-21 21:29:40,512 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 589 transitions, 9890 flow [2024-06-21 21:29:40,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:40,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:40,512 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] [2024-06-21 21:29:40,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 21:29:40,513 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:29:40,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:40,513 INFO L85 PathProgramCache]: Analyzing trace with hash -375552278, now seen corresponding path program 2 times [2024-06-21 21:29:40,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:40,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441892884] [2024-06-21 21:29:40,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:40,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:40,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:42,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:42,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:42,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441892884] [2024-06-21 21:29:42,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441892884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:42,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:42,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:29:42,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676821341] [2024-06-21 21:29:42,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:42,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:29:42,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:42,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:29:42,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:29:42,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:29:42,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 589 transitions, 9890 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:42,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:42,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:29:42,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:45,062 INFO L124 PetriNetUnfolderBase]: 6653/11255 cut-off events. [2024-06-21 21:29:45,063 INFO L125 PetriNetUnfolderBase]: For 714377/714391 co-relation queries the response was YES. [2024-06-21 21:29:45,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77282 conditions, 11255 events. 6653/11255 cut-off events. For 714377/714391 co-relation queries the response was YES. Maximal size of possible extension queue 745. Compared 85080 event pairs, 2201 based on Foata normal form. 54/11307 useless extension candidates. Maximal degree in co-relation 77131. Up to 9881 conditions per place. [2024-06-21 21:29:45,236 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 508 selfloop transitions, 116 changer transitions 0/629 dead transitions. [2024-06-21 21:29:45,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 629 transitions, 11294 flow [2024-06-21 21:29:45,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:29:45,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:29:45,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 21:29:45,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 21:29:45,238 INFO L175 Difference]: Start difference. First operand has 332 places, 589 transitions, 9890 flow. Second operand 9 states and 168 transitions. [2024-06-21 21:29:45,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 629 transitions, 11294 flow [2024-06-21 21:29:47,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 629 transitions, 11082 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 21:29:47,575 INFO L231 Difference]: Finished difference. Result has 336 places, 589 transitions, 9920 flow [2024-06-21 21:29:47,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9678, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9920, PETRI_PLACES=336, PETRI_TRANSITIONS=589} [2024-06-21 21:29:47,575 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-21 21:29:47,576 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 589 transitions, 9920 flow [2024-06-21 21:29:47,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:47,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:47,576 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] [2024-06-21 21:29:47,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 21:29:47,576 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:29:47,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:47,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1942056660, now seen corresponding path program 3 times [2024-06-21 21:29:47,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:47,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908664678] [2024-06-21 21:29:47,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:47,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:47,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:49,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:49,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:49,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908664678] [2024-06-21 21:29:49,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908664678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:49,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:49,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:29:49,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390162824] [2024-06-21 21:29:49,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:49,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:29:49,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:49,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:29:49,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:29:49,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:29:49,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 589 transitions, 9920 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:49,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:49,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:29:49,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:52,749 INFO L124 PetriNetUnfolderBase]: 6911/11672 cut-off events. [2024-06-21 21:29:52,749 INFO L125 PetriNetUnfolderBase]: For 771652/771666 co-relation queries the response was YES. [2024-06-21 21:29:52,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81703 conditions, 11672 events. 6911/11672 cut-off events. For 771652/771666 co-relation queries the response was YES. Maximal size of possible extension queue 770. Compared 88698 event pairs, 1858 based on Foata normal form. 46/11716 useless extension candidates. Maximal degree in co-relation 81550. Up to 9433 conditions per place. [2024-06-21 21:29:52,909 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 500 selfloop transitions, 141 changer transitions 0/646 dead transitions. [2024-06-21 21:29:52,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 646 transitions, 11723 flow [2024-06-21 21:29:52,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:29:52,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:29:52,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 21:29:52,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-21 21:29:52,911 INFO L175 Difference]: Start difference. First operand has 336 places, 589 transitions, 9920 flow. Second operand 9 states and 175 transitions. [2024-06-21 21:29:52,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 646 transitions, 11723 flow [2024-06-21 21:29:55,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 646 transitions, 11536 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 21:29:55,174 INFO L231 Difference]: Finished difference. Result has 340 places, 597 transitions, 10241 flow [2024-06-21 21:29:55,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9733, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10241, PETRI_PLACES=340, PETRI_TRANSITIONS=597} [2024-06-21 21:29:55,174 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-21 21:29:55,175 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 597 transitions, 10241 flow [2024-06-21 21:29:55,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:55,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:55,175 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] [2024-06-21 21:29:55,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 21:29:55,175 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:29:55,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:55,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1074732454, now seen corresponding path program 4 times [2024-06-21 21:29:55,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:55,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743201051] [2024-06-21 21:29:55,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:55,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:55,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:57,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:57,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:57,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743201051] [2024-06-21 21:29:57,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743201051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:57,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:57,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:29:57,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610927216] [2024-06-21 21:29:57,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:57,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:29:57,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:57,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:29:57,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:29:57,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:29:57,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 597 transitions, 10241 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:57,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:57,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:29:57,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:01,124 INFO L124 PetriNetUnfolderBase]: 6967/11756 cut-off events. [2024-06-21 21:30:01,124 INFO L125 PetriNetUnfolderBase]: For 748428/748444 co-relation queries the response was YES. [2024-06-21 21:30:01,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83436 conditions, 11756 events. 6967/11756 cut-off events. For 748428/748444 co-relation queries the response was YES. Maximal size of possible extension queue 776. Compared 89237 event pairs, 2054 based on Foata normal form. 32/11788 useless extension candidates. Maximal degree in co-relation 83281. Up to 10009 conditions per place. [2024-06-21 21:30:01,314 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 528 selfloop transitions, 116 changer transitions 0/649 dead transitions. [2024-06-21 21:30:01,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 649 transitions, 11939 flow [2024-06-21 21:30:01,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:30:01,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:30:01,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 21:30:01,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-21 21:30:01,315 INFO L175 Difference]: Start difference. First operand has 340 places, 597 transitions, 10241 flow. Second operand 9 states and 178 transitions. [2024-06-21 21:30:01,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 649 transitions, 11939 flow [2024-06-21 21:30:03,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 649 transitions, 11729 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-21 21:30:03,610 INFO L231 Difference]: Finished difference. Result has 346 places, 600 transitions, 10356 flow [2024-06-21 21:30:03,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10031, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10356, PETRI_PLACES=346, PETRI_TRANSITIONS=600} [2024-06-21 21:30:03,611 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-21 21:30:03,611 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 600 transitions, 10356 flow [2024-06-21 21:30:03,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:03,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:03,611 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] [2024-06-21 21:30:03,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 21:30:03,612 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:30:03,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:03,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1084255654, now seen corresponding path program 5 times [2024-06-21 21:30:03,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:03,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016690226] [2024-06-21 21:30:03,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:03,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:03,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:05,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:05,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:05,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016690226] [2024-06-21 21:30:05,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016690226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:05,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:05,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:30:05,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660138542] [2024-06-21 21:30:05,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:05,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:30:05,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:05,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:30:05,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:30:05,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:30:05,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 600 transitions, 10356 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:05,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:05,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:30:05,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:09,126 INFO L124 PetriNetUnfolderBase]: 7039/11866 cut-off events. [2024-06-21 21:30:09,126 INFO L125 PetriNetUnfolderBase]: For 776409/776425 co-relation queries the response was YES. [2024-06-21 21:30:09,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84769 conditions, 11866 events. 7039/11866 cut-off events. For 776409/776425 co-relation queries the response was YES. Maximal size of possible extension queue 784. Compared 90095 event pairs, 2169 based on Foata normal form. 36/11902 useless extension candidates. Maximal degree in co-relation 84611. Up to 10479 conditions per place. [2024-06-21 21:30:09,605 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 532 selfloop transitions, 104 changer transitions 0/641 dead transitions. [2024-06-21 21:30:09,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 641 transitions, 11823 flow [2024-06-21 21:30:09,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:30:09,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:30:09,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 21:30:09,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-21 21:30:09,607 INFO L175 Difference]: Start difference. First operand has 346 places, 600 transitions, 10356 flow. Second operand 9 states and 169 transitions. [2024-06-21 21:30:09,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 641 transitions, 11823 flow [2024-06-21 21:30:11,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 641 transitions, 11640 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 21:30:11,867 INFO L231 Difference]: Finished difference. Result has 349 places, 602 transitions, 10442 flow [2024-06-21 21:30:11,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10175, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10442, PETRI_PLACES=349, PETRI_TRANSITIONS=602} [2024-06-21 21:30:11,868 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-21 21:30:11,868 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 602 transitions, 10442 flow [2024-06-21 21:30:11,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:11,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:11,869 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] [2024-06-21 21:30:11,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 21:30:11,869 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:30:11,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:11,872 INFO L85 PathProgramCache]: Analyzing trace with hash -2048444492, now seen corresponding path program 6 times [2024-06-21 21:30:11,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:11,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392954663] [2024-06-21 21:30:11,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:11,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:11,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:14,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:14,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:14,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392954663] [2024-06-21 21:30:14,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392954663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:14,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:14,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:30:14,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480539842] [2024-06-21 21:30:14,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:14,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:30:14,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:14,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:30:14,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:30:14,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:30:14,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 602 transitions, 10442 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:14,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:14,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:30:14,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:17,839 INFO L124 PetriNetUnfolderBase]: 6980/11769 cut-off events. [2024-06-21 21:30:17,840 INFO L125 PetriNetUnfolderBase]: For 735744/735750 co-relation queries the response was YES. [2024-06-21 21:30:17,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82639 conditions, 11769 events. 6980/11769 cut-off events. For 735744/735750 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 89261 event pairs, 2116 based on Foata normal form. 26/11795 useless extension candidates. Maximal degree in co-relation 82481. Up to 10474 conditions per place. [2024-06-21 21:30:18,028 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 530 selfloop transitions, 100 changer transitions 0/635 dead transitions. [2024-06-21 21:30:18,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 635 transitions, 11832 flow [2024-06-21 21:30:18,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:30:18,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:30:18,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 21:30:18,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 21:30:18,030 INFO L175 Difference]: Start difference. First operand has 349 places, 602 transitions, 10442 flow. Second operand 9 states and 161 transitions. [2024-06-21 21:30:18,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 635 transitions, 11832 flow [2024-06-21 21:30:20,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 635 transitions, 11614 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 21:30:20,754 INFO L231 Difference]: Finished difference. Result has 351 places, 602 transitions, 10430 flow [2024-06-21 21:30:20,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10224, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10430, PETRI_PLACES=351, PETRI_TRANSITIONS=602} [2024-06-21 21:30:20,755 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 308 predicate places. [2024-06-21 21:30:20,755 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 602 transitions, 10430 flow [2024-06-21 21:30:20,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:20,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:20,756 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] [2024-06-21 21:30:20,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 21:30:20,756 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:30:20,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:20,756 INFO L85 PathProgramCache]: Analyzing trace with hash 380923790, now seen corresponding path program 1 times [2024-06-21 21:30:20,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:20,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192229096] [2024-06-21 21:30:20,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:20,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:20,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:23,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:23,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:23,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192229096] [2024-06-21 21:30:23,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192229096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:23,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:23,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:30:23,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408490234] [2024-06-21 21:30:23,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:23,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:30:23,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:23,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:30:23,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:30:23,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:30:23,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 602 transitions, 10430 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:23,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:23,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:30:23,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:26,863 INFO L124 PetriNetUnfolderBase]: 7032/11838 cut-off events. [2024-06-21 21:30:26,863 INFO L125 PetriNetUnfolderBase]: For 713559/713561 co-relation queries the response was YES. [2024-06-21 21:30:27,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83423 conditions, 11838 events. 7032/11838 cut-off events. For 713559/713561 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 89769 event pairs, 2124 based on Foata normal form. 6/11844 useless extension candidates. Maximal degree in co-relation 83264. Up to 10173 conditions per place. [2024-06-21 21:30:27,048 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 506 selfloop transitions, 140 changer transitions 0/651 dead transitions. [2024-06-21 21:30:27,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 651 transitions, 12476 flow [2024-06-21 21:30:27,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:30:27,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:30:27,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 21:30:27,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-21 21:30:27,050 INFO L175 Difference]: Start difference. First operand has 351 places, 602 transitions, 10430 flow. Second operand 9 states and 176 transitions. [2024-06-21 21:30:27,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 651 transitions, 12476 flow [2024-06-21 21:30:29,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 651 transitions, 12266 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 21:30:29,260 INFO L231 Difference]: Finished difference. Result has 353 places, 610 transitions, 10620 flow [2024-06-21 21:30:29,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10220, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10620, PETRI_PLACES=353, PETRI_TRANSITIONS=610} [2024-06-21 21:30:29,261 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-21 21:30:29,261 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 610 transitions, 10620 flow [2024-06-21 21:30:29,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:29,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:29,261 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] [2024-06-21 21:30:29,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 21:30:29,261 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:30:29,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:29,262 INFO L85 PathProgramCache]: Analyzing trace with hash -746512340, now seen corresponding path program 2 times [2024-06-21 21:30:29,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:29,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264429029] [2024-06-21 21:30:29,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:29,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:29,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:31,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:31,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:31,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264429029] [2024-06-21 21:30:31,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264429029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:31,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:31,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:30:31,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485357847] [2024-06-21 21:30:31,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:31,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:30:31,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:31,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:30:31,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:30:31,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:30:31,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 610 transitions, 10620 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:31,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:31,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:30:31,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:35,432 INFO L124 PetriNetUnfolderBase]: 7052/11870 cut-off events. [2024-06-21 21:30:35,433 INFO L125 PetriNetUnfolderBase]: For 728588/728590 co-relation queries the response was YES. [2024-06-21 21:30:35,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83951 conditions, 11870 events. 7052/11870 cut-off events. For 728588/728590 co-relation queries the response was YES. Maximal size of possible extension queue 793. Compared 89938 event pairs, 2122 based on Foata normal form. 6/11876 useless extension candidates. Maximal degree in co-relation 83791. Up to 10189 conditions per place. [2024-06-21 21:30:35,595 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 504 selfloop transitions, 143 changer transitions 0/652 dead transitions. [2024-06-21 21:30:35,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 652 transitions, 12619 flow [2024-06-21 21:30:35,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:30:35,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:30:35,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 21:30:35,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-21 21:30:35,597 INFO L175 Difference]: Start difference. First operand has 353 places, 610 transitions, 10620 flow. Second operand 9 states and 173 transitions. [2024-06-21 21:30:35,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 652 transitions, 12619 flow [2024-06-21 21:30:37,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 652 transitions, 12393 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 21:30:38,001 INFO L231 Difference]: Finished difference. Result has 357 places, 614 transitions, 10751 flow [2024-06-21 21:30:38,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10405, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10751, PETRI_PLACES=357, PETRI_TRANSITIONS=614} [2024-06-21 21:30:38,002 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 314 predicate places. [2024-06-21 21:30:38,002 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 614 transitions, 10751 flow [2024-06-21 21:30:38,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:38,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:38,002 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] [2024-06-21 21:30:38,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 21:30:38,002 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:30:38,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:38,003 INFO L85 PathProgramCache]: Analyzing trace with hash -716338338, now seen corresponding path program 3 times [2024-06-21 21:30:38,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:38,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568739194] [2024-06-21 21:30:38,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:38,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:38,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:40,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:40,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:40,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568739194] [2024-06-21 21:30:40,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568739194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:40,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:40,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:30:40,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113653330] [2024-06-21 21:30:40,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:40,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:30:40,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:40,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:30:40,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:30:40,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:30:40,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 614 transitions, 10751 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:40,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:40,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:30:40,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:43,914 INFO L124 PetriNetUnfolderBase]: 7040/11861 cut-off events. [2024-06-21 21:30:43,914 INFO L125 PetriNetUnfolderBase]: For 735335/735337 co-relation queries the response was YES. [2024-06-21 21:30:44,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83743 conditions, 11861 events. 7040/11861 cut-off events. For 735335/735337 co-relation queries the response was YES. Maximal size of possible extension queue 792. Compared 90099 event pairs, 2126 based on Foata normal form. 6/11867 useless extension candidates. Maximal degree in co-relation 83582. Up to 10181 conditions per place. [2024-06-21 21:30:44,117 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 492 selfloop transitions, 149 changer transitions 0/646 dead transitions. [2024-06-21 21:30:44,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 646 transitions, 12495 flow [2024-06-21 21:30:44,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:30:44,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:30:44,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 21:30:44,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 21:30:44,119 INFO L175 Difference]: Start difference. First operand has 357 places, 614 transitions, 10751 flow. Second operand 9 states and 165 transitions. [2024-06-21 21:30:44,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 646 transitions, 12495 flow [2024-06-21 21:30:46,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 646 transitions, 12222 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 21:30:46,868 INFO L231 Difference]: Finished difference. Result has 360 places, 614 transitions, 10783 flow [2024-06-21 21:30:46,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10478, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10783, PETRI_PLACES=360, PETRI_TRANSITIONS=614} [2024-06-21 21:30:46,869 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-21 21:30:46,869 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 614 transitions, 10783 flow [2024-06-21 21:30:46,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:46,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:46,870 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] [2024-06-21 21:30:46,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 21:30:46,870 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:30:46,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:46,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1398358120, now seen corresponding path program 1 times [2024-06-21 21:30:46,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:46,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419996994] [2024-06-21 21:30:46,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:46,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:46,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:50,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:50,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:50,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419996994] [2024-06-21 21:30:50,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419996994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:50,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:50,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:30:50,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653531741] [2024-06-21 21:30:50,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:50,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:30:50,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:50,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:30:50,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:30:50,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:30:50,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 614 transitions, 10783 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:50,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:50,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:30:50,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:53,802 INFO L124 PetriNetUnfolderBase]: 7146/12017 cut-off events. [2024-06-21 21:30:53,802 INFO L125 PetriNetUnfolderBase]: For 810363/810369 co-relation queries the response was YES. [2024-06-21 21:30:53,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85818 conditions, 12017 events. 7146/12017 cut-off events. For 810363/810369 co-relation queries the response was YES. Maximal size of possible extension queue 796. Compared 91095 event pairs, 2119 based on Foata normal form. 18/12035 useless extension candidates. Maximal degree in co-relation 85656. Up to 10141 conditions per place. [2024-06-21 21:30:53,975 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 544 selfloop transitions, 106 changer transitions 0/655 dead transitions. [2024-06-21 21:30:53,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 655 transitions, 12501 flow [2024-06-21 21:30:53,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:30:53,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:30:53,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-21 21:30:53,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-21 21:30:53,977 INFO L175 Difference]: Start difference. First operand has 360 places, 614 transitions, 10783 flow. Second operand 10 states and 176 transitions. [2024-06-21 21:30:53,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 655 transitions, 12501 flow [2024-06-21 21:30:56,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 655 transitions, 12204 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 21:30:56,662 INFO L231 Difference]: Finished difference. Result has 364 places, 618 transitions, 10847 flow [2024-06-21 21:30:56,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10486, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10847, PETRI_PLACES=364, PETRI_TRANSITIONS=618} [2024-06-21 21:30:56,669 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-21 21:30:56,669 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 618 transitions, 10847 flow [2024-06-21 21:30:56,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:56,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:56,670 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] [2024-06-21 21:30:56,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 21:30:56,670 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:30:56,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:56,670 INFO L85 PathProgramCache]: Analyzing trace with hash 150161010, now seen corresponding path program 7 times [2024-06-21 21:30:56,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:56,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869156257] [2024-06-21 21:30:56,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:56,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:56,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:59,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:59,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:59,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869156257] [2024-06-21 21:30:59,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869156257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:59,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:59,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:30:59,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077227055] [2024-06-21 21:30:59,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:59,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:30:59,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:59,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:30:59,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:30:59,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:30:59,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 618 transitions, 10847 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:59,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:59,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:30:59,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:02,961 INFO L124 PetriNetUnfolderBase]: 7202/12133 cut-off events. [2024-06-21 21:31:02,961 INFO L125 PetriNetUnfolderBase]: For 849667/849681 co-relation queries the response was YES. [2024-06-21 21:31:03,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86951 conditions, 12133 events. 7202/12133 cut-off events. For 849667/849681 co-relation queries the response was YES. Maximal size of possible extension queue 803. Compared 92451 event pairs, 1820 based on Foata normal form. 30/12161 useless extension candidates. Maximal degree in co-relation 86787. Up to 9744 conditions per place. [2024-06-21 21:31:03,143 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 494 selfloop transitions, 165 changer transitions 0/664 dead transitions. [2024-06-21 21:31:03,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 664 transitions, 12573 flow [2024-06-21 21:31:03,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:31:03,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:31:03,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-21 21:31:03,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-21 21:31:03,145 INFO L175 Difference]: Start difference. First operand has 364 places, 618 transitions, 10847 flow. Second operand 10 states and 181 transitions. [2024-06-21 21:31:03,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 664 transitions, 12573 flow [2024-06-21 21:31:05,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 664 transitions, 12407 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 21:31:05,549 INFO L231 Difference]: Finished difference. Result has 369 places, 620 transitions, 11087 flow [2024-06-21 21:31:05,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10681, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11087, PETRI_PLACES=369, PETRI_TRANSITIONS=620} [2024-06-21 21:31:05,550 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-21 21:31:05,550 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 620 transitions, 11087 flow [2024-06-21 21:31:05,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:05,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:05,551 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] [2024-06-21 21:31:05,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 21:31:05,551 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:05,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:05,551 INFO L85 PathProgramCache]: Analyzing trace with hash 19432254, now seen corresponding path program 8 times [2024-06-21 21:31:05,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:05,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316605609] [2024-06-21 21:31:05,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:05,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:05,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:08,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:08,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:08,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316605609] [2024-06-21 21:31:08,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316605609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:08,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:08,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:31:08,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962629484] [2024-06-21 21:31:08,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:08,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:31:08,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:08,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:31:08,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:31:08,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:31:08,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 620 transitions, 11087 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:08,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:08,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:31:08,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:12,459 INFO L124 PetriNetUnfolderBase]: 7482/12553 cut-off events. [2024-06-21 21:31:12,460 INFO L125 PetriNetUnfolderBase]: For 891168/891180 co-relation queries the response was YES. [2024-06-21 21:31:12,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91597 conditions, 12553 events. 7482/12553 cut-off events. For 891168/891180 co-relation queries the response was YES. Maximal size of possible extension queue 836. Compared 95488 event pairs, 2259 based on Foata normal form. 27/12580 useless extension candidates. Maximal degree in co-relation 91431. Up to 11108 conditions per place. [2024-06-21 21:31:12,708 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 559 selfloop transitions, 117 changer transitions 0/681 dead transitions. [2024-06-21 21:31:12,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 681 transitions, 13299 flow [2024-06-21 21:31:12,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:31:12,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:31:12,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 183 transitions. [2024-06-21 21:31:12,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961038961038961 [2024-06-21 21:31:12,710 INFO L175 Difference]: Start difference. First operand has 369 places, 620 transitions, 11087 flow. Second operand 11 states and 183 transitions. [2024-06-21 21:31:12,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 681 transitions, 13299 flow [2024-06-21 21:31:15,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 681 transitions, 12922 flow, removed 23 selfloop flow, removed 10 redundant places. [2024-06-21 21:31:15,726 INFO L231 Difference]: Finished difference. Result has 374 places, 648 transitions, 11841 flow [2024-06-21 21:31:15,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10755, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11841, PETRI_PLACES=374, PETRI_TRANSITIONS=648} [2024-06-21 21:31:15,726 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 331 predicate places. [2024-06-21 21:31:15,726 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 648 transitions, 11841 flow [2024-06-21 21:31:15,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:15,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:15,727 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] [2024-06-21 21:31:15,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 21:31:15,727 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:15,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:15,728 INFO L85 PathProgramCache]: Analyzing trace with hash -22949714, now seen corresponding path program 9 times [2024-06-21 21:31:15,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:15,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415377435] [2024-06-21 21:31:15,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:15,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:15,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:18,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:18,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:18,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415377435] [2024-06-21 21:31:18,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415377435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:18,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:18,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:31:18,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253366671] [2024-06-21 21:31:18,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:18,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:31:18,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:18,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:31:18,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:31:18,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:31:18,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 648 transitions, 11841 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:18,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:18,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:31:18,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:21,673 INFO L124 PetriNetUnfolderBase]: 7436/12483 cut-off events. [2024-06-21 21:31:21,674 INFO L125 PetriNetUnfolderBase]: For 772971/772977 co-relation queries the response was YES. [2024-06-21 21:31:21,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88412 conditions, 12483 events. 7436/12483 cut-off events. For 772971/772977 co-relation queries the response was YES. Maximal size of possible extension queue 836. Compared 95088 event pairs, 2182 based on Foata normal form. 26/12509 useless extension candidates. Maximal degree in co-relation 88244. Up to 11002 conditions per place. [2024-06-21 21:31:21,844 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 543 selfloop transitions, 126 changer transitions 0/674 dead transitions. [2024-06-21 21:31:21,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 674 transitions, 13289 flow [2024-06-21 21:31:21,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:31:21,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:31:21,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 21:31:21,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 21:31:21,845 INFO L175 Difference]: Start difference. First operand has 374 places, 648 transitions, 11841 flow. Second operand 8 states and 139 transitions. [2024-06-21 21:31:21,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 674 transitions, 13289 flow [2024-06-21 21:31:24,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 674 transitions, 13084 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 21:31:24,134 INFO L231 Difference]: Finished difference. Result has 376 places, 648 transitions, 11900 flow [2024-06-21 21:31:24,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11636, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11900, PETRI_PLACES=376, PETRI_TRANSITIONS=648} [2024-06-21 21:31:24,134 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 333 predicate places. [2024-06-21 21:31:24,135 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 648 transitions, 11900 flow [2024-06-21 21:31:24,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:24,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:24,135 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] [2024-06-21 21:31:24,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 21:31:24,135 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:24,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:24,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1137802088, now seen corresponding path program 4 times [2024-06-21 21:31:24,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:24,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505221686] [2024-06-21 21:31:24,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:24,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:24,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:27,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:27,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:27,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505221686] [2024-06-21 21:31:27,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505221686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:27,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:27,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:31:27,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532716395] [2024-06-21 21:31:27,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:27,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:31:27,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:27,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:31:27,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:31:27,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:31:27,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 648 transitions, 11900 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:27,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:27,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:31:27,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:30,829 INFO L124 PetriNetUnfolderBase]: 7592/12678 cut-off events. [2024-06-21 21:31:30,830 INFO L125 PetriNetUnfolderBase]: For 806876/806876 co-relation queries the response was YES. [2024-06-21 21:31:30,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90833 conditions, 12678 events. 7592/12678 cut-off events. For 806876/806876 co-relation queries the response was YES. Maximal size of possible extension queue 857. Compared 96126 event pairs, 2217 based on Foata normal form. 12/12689 useless extension candidates. Maximal degree in co-relation 90664. Up to 10351 conditions per place. [2024-06-21 21:31:31,033 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 372 selfloop transitions, 332 changer transitions 0/709 dead transitions. [2024-06-21 21:31:31,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 709 transitions, 14199 flow [2024-06-21 21:31:31,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:31:31,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:31:31,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 195 transitions. [2024-06-21 21:31:31,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42207792207792205 [2024-06-21 21:31:31,035 INFO L175 Difference]: Start difference. First operand has 376 places, 648 transitions, 11900 flow. Second operand 11 states and 195 transitions. [2024-06-21 21:31:31,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 709 transitions, 14199 flow [2024-06-21 21:31:33,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 709 transitions, 13873 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 21:31:33,845 INFO L231 Difference]: Finished difference. Result has 380 places, 670 transitions, 12650 flow [2024-06-21 21:31:33,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11578, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=314, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12650, PETRI_PLACES=380, PETRI_TRANSITIONS=670} [2024-06-21 21:31:33,845 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 337 predicate places. [2024-06-21 21:31:33,846 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 670 transitions, 12650 flow [2024-06-21 21:31:33,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:33,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:33,846 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] [2024-06-21 21:31:33,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 21:31:33,846 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:33,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:33,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1204914764, now seen corresponding path program 5 times [2024-06-21 21:31:33,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:33,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023332497] [2024-06-21 21:31:33,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:33,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:33,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:37,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:37,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:37,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023332497] [2024-06-21 21:31:37,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023332497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:37,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:37,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:31:37,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428122118] [2024-06-21 21:31:37,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:37,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:31:37,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:37,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:31:37,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:31:37,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:31:37,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 670 transitions, 12650 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:37,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:37,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:31:37,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:40,885 INFO L124 PetriNetUnfolderBase]: 7600/12688 cut-off events. [2024-06-21 21:31:40,886 INFO L125 PetriNetUnfolderBase]: For 789067/789067 co-relation queries the response was YES. [2024-06-21 21:31:41,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92661 conditions, 12688 events. 7600/12688 cut-off events. For 789067/789067 co-relation queries the response was YES. Maximal size of possible extension queue 859. Compared 96119 event pairs, 2215 based on Foata normal form. 8/12695 useless extension candidates. Maximal degree in co-relation 92491. Up to 10359 conditions per place. [2024-06-21 21:31:41,081 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 376 selfloop transitions, 328 changer transitions 0/709 dead transitions. [2024-06-21 21:31:41,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 709 transitions, 14683 flow [2024-06-21 21:31:41,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:31:41,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:31:41,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-21 21:31:41,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-21 21:31:41,083 INFO L175 Difference]: Start difference. First operand has 380 places, 670 transitions, 12650 flow. Second operand 10 states and 181 transitions. [2024-06-21 21:31:41,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 709 transitions, 14683 flow [2024-06-21 21:31:44,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 709 transitions, 14081 flow, removed 98 selfloop flow, removed 8 redundant places. [2024-06-21 21:31:44,322 INFO L231 Difference]: Finished difference. Result has 382 places, 674 transitions, 12813 flow [2024-06-21 21:31:44,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12078, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=324, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12813, PETRI_PLACES=382, PETRI_TRANSITIONS=674} [2024-06-21 21:31:44,323 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-21 21:31:44,323 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 674 transitions, 12813 flow [2024-06-21 21:31:44,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:44,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:44,324 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] [2024-06-21 21:31:44,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 21:31:44,324 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:44,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:44,324 INFO L85 PathProgramCache]: Analyzing trace with hash 268475496, now seen corresponding path program 6 times [2024-06-21 21:31:44,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:44,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082137229] [2024-06-21 21:31:44,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:44,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:44,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:47,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:47,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:47,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082137229] [2024-06-21 21:31:47,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082137229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:47,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:47,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:31:47,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602844459] [2024-06-21 21:31:47,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:47,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:31:47,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:47,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:31:47,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:31:47,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:31:47,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 674 transitions, 12813 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:47,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:47,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:31:47,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:51,397 INFO L124 PetriNetUnfolderBase]: 7588/12699 cut-off events. [2024-06-21 21:31:51,397 INFO L125 PetriNetUnfolderBase]: For 755017/755017 co-relation queries the response was YES. [2024-06-21 21:31:51,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91147 conditions, 12699 events. 7588/12699 cut-off events. For 755017/755017 co-relation queries the response was YES. Maximal size of possible extension queue 861. Compared 96576 event pairs, 2284 based on Foata normal form. 4/12702 useless extension candidates. Maximal degree in co-relation 90977. Up to 10351 conditions per place. [2024-06-21 21:31:51,580 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 401 selfloop transitions, 292 changer transitions 0/698 dead transitions. [2024-06-21 21:31:51,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 698 transitions, 14483 flow [2024-06-21 21:31:51,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:31:51,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:31:51,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 21:31:51,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 21:31:51,582 INFO L175 Difference]: Start difference. First operand has 382 places, 674 transitions, 12813 flow. Second operand 8 states and 144 transitions. [2024-06-21 21:31:51,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 698 transitions, 14483 flow [2024-06-21 21:31:54,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 698 transitions, 13798 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-21 21:31:54,670 INFO L231 Difference]: Finished difference. Result has 382 places, 674 transitions, 12727 flow [2024-06-21 21:31:54,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12130, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=292, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12727, PETRI_PLACES=382, PETRI_TRANSITIONS=674} [2024-06-21 21:31:54,671 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-21 21:31:54,671 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 674 transitions, 12727 flow [2024-06-21 21:31:54,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:54,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:54,672 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] [2024-06-21 21:31:54,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 21:31:54,672 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:54,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:54,672 INFO L85 PathProgramCache]: Analyzing trace with hash 30556728, now seen corresponding path program 2 times [2024-06-21 21:31:54,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:54,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794662060] [2024-06-21 21:31:54,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:54,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:54,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:58,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:58,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:58,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794662060] [2024-06-21 21:31:58,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794662060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:58,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:58,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:31:58,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618517251] [2024-06-21 21:31:58,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:58,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:31:58,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:58,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:31:58,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:31:58,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:31:58,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 674 transitions, 12727 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:58,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:58,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:31:58,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:02,719 INFO L124 PetriNetUnfolderBase]: 7707/12884 cut-off events. [2024-06-21 21:32:02,719 INFO L125 PetriNetUnfolderBase]: For 824015/824021 co-relation queries the response was YES. [2024-06-21 21:32:02,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93429 conditions, 12884 events. 7707/12884 cut-off events. For 824015/824021 co-relation queries the response was YES. Maximal size of possible extension queue 871. Compared 98025 event pairs, 2149 based on Foata normal form. 18/12902 useless extension candidates. Maximal degree in co-relation 93259. Up to 10345 conditions per place. [2024-06-21 21:32:03,005 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 578 selfloop transitions, 124 changer transitions 0/707 dead transitions. [2024-06-21 21:32:03,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 707 transitions, 14545 flow [2024-06-21 21:32:03,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:32:03,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:32:03,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 21:32:03,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 21:32:03,006 INFO L175 Difference]: Start difference. First operand has 382 places, 674 transitions, 12727 flow. Second operand 8 states and 141 transitions. [2024-06-21 21:32:03,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 707 transitions, 14545 flow [2024-06-21 21:32:05,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 707 transitions, 13889 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 21:32:05,827 INFO L231 Difference]: Finished difference. Result has 381 places, 678 transitions, 12526 flow [2024-06-21 21:32:05,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12073, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12526, PETRI_PLACES=381, PETRI_TRANSITIONS=678} [2024-06-21 21:32:05,827 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 338 predicate places. [2024-06-21 21:32:05,827 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 678 transitions, 12526 flow [2024-06-21 21:32:05,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:32:05,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:05,828 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] [2024-06-21 21:32:05,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 21:32:05,828 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:32:05,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:05,828 INFO L85 PathProgramCache]: Analyzing trace with hash 2060918996, now seen corresponding path program 10 times [2024-06-21 21:32:05,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:05,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719251318] [2024-06-21 21:32:05,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:05,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:05,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:09,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:09,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:09,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719251318] [2024-06-21 21:32:09,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719251318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:09,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:09,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:09,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681278375] [2024-06-21 21:32:09,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:09,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:09,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:09,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:09,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:09,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:32:09,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 678 transitions, 12526 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:32:09,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:09,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:32:09,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:13,475 INFO L124 PetriNetUnfolderBase]: 7753/12970 cut-off events. [2024-06-21 21:32:13,475 INFO L125 PetriNetUnfolderBase]: For 840982/841006 co-relation queries the response was YES. [2024-06-21 21:32:13,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93659 conditions, 12970 events. 7753/12970 cut-off events. For 840982/841006 co-relation queries the response was YES. Maximal size of possible extension queue 875. Compared 98859 event pairs, 2202 based on Foata normal form. 32/13002 useless extension candidates. Maximal degree in co-relation 93488. Up to 11485 conditions per place. [2024-06-21 21:32:13,830 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 567 selfloop transitions, 128 changer transitions 0/700 dead transitions. [2024-06-21 21:32:13,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 700 transitions, 14064 flow [2024-06-21 21:32:13,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:32:13,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:32:13,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 21:32:13,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 21:32:13,841 INFO L175 Difference]: Start difference. First operand has 381 places, 678 transitions, 12526 flow. Second operand 8 states and 135 transitions. [2024-06-21 21:32:13,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 700 transitions, 14064 flow [2024-06-21 21:32:16,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 700 transitions, 13864 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-21 21:32:16,958 INFO L231 Difference]: Finished difference. Result has 384 places, 680 transitions, 12656 flow [2024-06-21 21:32:16,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12328, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12656, PETRI_PLACES=384, PETRI_TRANSITIONS=680} [2024-06-21 21:32:16,958 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-21 21:32:16,958 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 680 transitions, 12656 flow [2024-06-21 21:32:16,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:32:16,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:16,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:16,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 21:32:16,959 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:32:16,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:16,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1528907156, now seen corresponding path program 7 times [2024-06-21 21:32:16,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:16,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080144394] [2024-06-21 21:32:16,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:16,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:19,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:19,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:19,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080144394] [2024-06-21 21:32:19,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080144394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:19,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:19,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:19,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578314201] [2024-06-21 21:32:19,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:19,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:19,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:19,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:19,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:19,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:32:19,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 680 transitions, 12656 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:32:19,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:19,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:32:19,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:23,956 INFO L124 PetriNetUnfolderBase]: 7815/13012 cut-off events. [2024-06-21 21:32:23,956 INFO L125 PetriNetUnfolderBase]: For 808992/808998 co-relation queries the response was YES. [2024-06-21 21:32:24,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94853 conditions, 13012 events. 7815/13012 cut-off events. For 808992/808998 co-relation queries the response was YES. Maximal size of possible extension queue 883. Compared 98743 event pairs, 2349 based on Foata normal form. 6/13018 useless extension candidates. Maximal degree in co-relation 94681. Up to 11332 conditions per place. [2024-06-21 21:32:24,136 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 472 selfloop transitions, 260 changer transitions 0/737 dead transitions. [2024-06-21 21:32:24,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 737 transitions, 15048 flow [2024-06-21 21:32:24,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:32:24,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:32:24,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-21 21:32:24,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 21:32:24,138 INFO L175 Difference]: Start difference. First operand has 384 places, 680 transitions, 12656 flow. Second operand 10 states and 175 transitions. [2024-06-21 21:32:24,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 737 transitions, 15048 flow [2024-06-21 21:32:27,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 737 transitions, 14748 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 21:32:27,022 INFO L231 Difference]: Finished difference. Result has 388 places, 701 transitions, 13288 flow [2024-06-21 21:32:27,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12356, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13288, PETRI_PLACES=388, PETRI_TRANSITIONS=701} [2024-06-21 21:32:27,022 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 345 predicate places. [2024-06-21 21:32:27,022 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 701 transitions, 13288 flow [2024-06-21 21:32:27,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:32:27,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:27,023 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] [2024-06-21 21:32:27,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 21:32:27,023 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:32:27,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:27,023 INFO L85 PathProgramCache]: Analyzing trace with hash 227461190, now seen corresponding path program 8 times [2024-06-21 21:32:27,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:27,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933301019] [2024-06-21 21:32:27,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:27,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:27,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:29,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:29,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:29,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933301019] [2024-06-21 21:32:29,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933301019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:29,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:29,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:29,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111659713] [2024-06-21 21:32:29,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:29,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:29,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:29,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:29,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:29,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:32:29,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 701 transitions, 13288 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:32:29,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:29,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:32:29,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand